顔写真

コミヤ アツキ
小宮 敦樹
Atsuki Komiya
所属
流体科学研究所 複雑流動研究部門 伝熱制御研究分野
職名
教授
学位
  • 博士(工学)(東北大学)

  • 修士(工学)(東北大学)

経歴 8

  • 2019年4月 ~ 継続中
    東北大学 流体科学研究所 教授

  • 2011年4月 ~ 2019年3月
    東北大学 流体科学研究所 准教授

  • 2008年4月 ~ 2011年3月
    東北大学 流体科学研究所 講師

  • 2007年4月 ~ 2008年3月
    東北大学 流体科学研究所 助教

  • 2004年4月 ~ 2007年3月
    東北大学 流体科学研究所 助手

  • 2003年10月 ~ 2004年3月
    宇宙航空研究開発機構 宇宙科学研究本部ISS科学プロジェクト室 宇宙航空プロジェクト研究員

  • 2002年4月 ~ 2003年9月
    宇宙開発事業団 宇宙環境利用研究システム 宇宙開発特別研究員

  • 2000年1月 ~ 2002年3月
    日本学術振興会 特別研究員(DC2)

︎全件表示 ︎最初の5件までを表示

学歴 3

  • 東北大学 大学院工学研究科 機械知能工学専攻

    1999年4月 ~ 2002年3月

  • 東北大学 大学院工学研究科 機械知能工学専攻

    1997年4月 ~ 1999年3月

  • 東北大学 工学部 機械知能工学科

    1993年4月 ~ 1997年3月

委員歴 55

  • 一般社団法人日本機械学会 JTST エディタ

    2020年4月 ~ 継続中

  • 公益社団法人日本伝熱学会 特定推進研究企画委員会 幹事

    2019年5月 ~ 継続中

  • Engineered Science Energy & Environment Editorial Board

    2019年2月 ~ 継続中

  • Journal of Flow Visualization and Image Processing Editor

    2018年2月 ~ 継続中

  • 文部科学省科学技術・学術政策研究所科学技術動向研究センター 専門調査員

    2014年4月 ~ 継続中

  • Transactions of the JSME (in Japanese), Mechanical Engineering Journal, Mechanical Engineering Letters, Bio, Medical, Sports and Human Engineering Associate Editor

    2014年4月 ~ 継続中

  • 公益社団法人日本伝熱学会 協議員

    2021年5月 ~ 2023年5月

  • 公益社団法人日本伝熱学会 学生会委員長

    2021年5月 ~ 2023年5月

  • 一般社団法人日本機械学会 医工学テクノロジー推進会議運営委員

    2013年4月 ~ 2023年3月

  • 一般社団法人日本機械学会 商議員

    2021年3月 ~ 2023年2月

  • 公益社団法人日本伝熱学会東北支部 副支部長

    2020年5月 ~ 2022年5月

  • 公益社団法人日本伝熱学会 協議員

    2017年5月 ~ 2020年5月

  • 公益社団法人日本伝熱学会 企画部会委員

    2012年4月 ~ 2020年5月

  • 一般社団法人日本機械学会 交通・物流部門代議員

    2018年4月 ~ 2020年3月

  • 一般社団法人日本機械学会 年次大会実行委員

    2018年4月 ~ 2019年10月

  • 一般社団法人日本機械学会 熱工学部門総務幹事

    2017年4月 ~ 2018年3月

  • 日本機械学会東北支部熱工学部門 代議員

    2016年4月 ~ 2018年3月

  • 一般社団法人日本機械学会 代議員

    2016年4月 ~ 2018年3月

  • 公益社団法人日本伝熱学会 学生会委員

    2004年4月 ~ 2017年5月

  • 日本機械学会熱工学部門 部門幹事

    2016年4月 ~ 2017年3月

  • 日本機械学会熱工学部門部門賞委員会 幹事

    2016年4月 ~ 2017年3月

  • 一般社団法人日本機械学会 熱工学部門幹事

    2016年4月 ~ 2017年3月

  • 一般社団法人日本機械学会 熱工学部門部門賞委員会幹事

    2016年4月 ~ 2017年3月

  • 日本熱物性学会 評議員

    2015年1月 ~ 2017年1月

  • 日本熱物性学会 評議員

    2015年1月 ~ 2017年1月

  • 日本伝熱学会 協議員

    2014年5月 ~ 2016年5月

  • Heat Transfer Society of Japan 学生委員会幹事

    2014年5月 ~ 2016年5月

  • 公益社団法人日本伝熱学会 学生会委員会幹事

    2014年5月 ~ 2016年5月

  • 公益社団法人日本伝熱学会 協議員

    2012年5月 ~ 2016年5月

  • Transactions of the JSME (in Japanese), Mechanical Engineering Journal, Mechanical Engineering Letters, Bio, Medical, Sports and Human Engineering Associate Editor

    2015年4月 ~ 2016年3月

  • 日本機械学会 医工学テクノロジー推進会議運営委員

    2014年4月 ~ 2015年3月

  • Transactions of the JSME (in Japanese), Mechanical Engineering Journal, Mechanical Engineering Letters, Bio, Medical, Sports and Human Engineering Associate Editor

    2014年4月 ~ 2015年3月

  • 日本機械学会 研究分科会委員

    2013年4月 ~ 2015年3月

  • 日本機械学会 高度物理刺激と生体応答に関する研究分科会委員

    2013年4月 ~ 2015年3月

  • 一般社団法人日本機械学会 研究分科会委員

    2013年4月 ~ 2015年3月

  • 一般社団法人日本機械学会 高度物理刺激と生体応答に関する研究分科会委員

    2013年4月 ~ 2015年3月

  • 公益社団法人日本伝熱学会 広報委員会委員長

    2012年5月 ~ 2014年5月

  • 日本伝熱学会 協議員

    2012年5月 ~ 2014年5月

  • 日本伝熱学会 広報委員会委員長

    2012年5月 ~ 2014年5月

  • 日本機械学会 医工学テクノロジー推進会議運営委員

    2013年4月 ~ 2014年3月

  • 日本機械学会 産業・化学機械と安全部門代議員

    2012年4月 ~ 2014年3月

  • 一般社団法人日本機械学会 産業・化学機械と安全部門代議員

    2012年4月 ~ 2014年3月

  • 日本機械学会 校閲委員

    2012年4月 ~ 2013年3月

  • 一般社団法人日本機械学会 校閲委員

    2011年4月 ~ 2013年3月

  • 東北大学工明会 理事

    2011年4月 ~ 2012年3月

  • 日本機械学会 校閲委員

    2011年4月 ~ 2012年3月

  • The Japan Society for Aeronautical and Space Sciences 北部支部支部幹事

    2005年3月 ~ 2012年3月

  • 日本航空宇宙学会 北部支部支部幹事

    2005年3月 ~ 2012年3月

  • 公益社団法人日本伝熱学会 広報委員会委員

    2008年5月 ~ 2011年5月

  • 公益社団法人日本伝熱学会 評議員

    2009年5月 ~ 2010年5月

  • 日本伝熱学会 広報委員会

    2008年4月 ~ 2010年3月

  • 日本機械学会 校閲委員

    2008年4月 ~ 2009年3月

  • 一般社団法人日本機械学会 校閲委員

    2007年4月 ~ 2009年3月

  • 日本機械学会 校閲委員

    2007年4月 ~ 2008年3月

  • Heat Transfer Society of Japan 学生委員

    2004年4月 ~

︎全件表示 ︎最初の5件までを表示

所属学協会 4

  • 日本冷凍空調学会

  • 日本熱物性学会

  • 日本伝熱学会

  • 日本機械学会

研究キーワード 4

  • 伝熱促進

  • 物性測定

  • 位相シフト技術

  • 光学計測

研究分野 1

  • ものづくり技術(機械・電気電子・化学工学) / 熱工学 /

受賞 9

  1. 講演論文表彰

    2020年10月 日本機械学会熱工学部門

  2. 熱工学部門一般表彰 貢献表彰

    2019年10月 一般社団法人 日本機械学会 熱工学分野における研究や熱工学部門に関連する事業への顕著な貢献

  3. 第55期(2016年度)学術賞

    2017年5月 公益社団法人日本伝熱学会 直交型位相シフト干渉計を用いた多次元計測による濃度場・流動場同時計測手法の開発と高精度物性評価

  4. 論文賞

    2015年11月 一般社団法人静電気学会 水中ストリーマの進展開始電圧に及ぼす放電パラメータの影響

  5. 第52期(2013年度)貢献賞

    2013年5月 公益社団法人日本伝熱学会 伝熱シンポジウム,広報委員,国際伝熱会議準備委員での多彩な活躍

  6. 平成24年度科学技術分野の文部科学大臣表彰 若手科学者賞

    2012年4月 文部科学省 複雑環境におけるタンパク質物資輸送高精度計測の研究

  7. 第28期(2007年度)日本熱物性学会賞 奨励賞

    2007年10月 日本熱物性学会 タンパク質拡散現象に及ぼす広域緩衝液の影響評価に関する研究

  8. 第39期(2000年度)奨励賞

    2001年5月 社団法人日本伝熱学会 Rapid yet accurate measurement of mass diffusion coefficients by phase shifting interferometer

  9. 第40期(2001年度)学生委員会ベストプレゼンテーション賞

    2001年5月 社団法人日本伝熱学会 微小重力場における非定常拡散場の計測

︎全件表示 ︎最初の5件までを表示

論文 249

  1. Controlling instability waves on vertical natural convection using a buoyant impinging jet

    Takuma Koizumi, Takuma Kogawa, Juan F. Torres, Yuki Kanda, Atsuki Komiya

    International Communications in Heat and Mass Transfer 148 107033-107033 2023年11月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.icheatmasstransfer.2023.107033  

    ISSN:0735-1933

  2. Optical visualization of heat transfer in supercritical carbon dioxide under near-critical, liquid-like, and gas-like conditions 国際誌 国際共著 査読有り

    Yuki Kanda, Haruki Ito, Lin Chen, Atsuki Komiya

    Physics of Fluids 35 (6) 067108 2023年6月5日

    出版者・発行元:AIP Publishing

    DOI: 10.1063/5.0149005  

    ISSN:1070-6631

    eISSN:1089-7666

    詳細を見る 詳細を閉じる

    Heat transfer in supercritical carbon dioxide (sCO2) is experimentally visualized, and a measurement method is proposed for evaluating the transport phenomena in near-critical, liquid-like, and gas-like conditions. There are various uses for sCO2 in engineering applications, such as abstraction, material processing, and soil remediation. However, the heat and mass transfer under supercritical conditions have not been fully revealed, and innovative measurement techniques with higher spatial and temporal resolutions are required. This study focuses on the evaluation of heat transfer in sCO2 using a high-speed phase-shifting interferometer. The density distribution of sCO2 under different temperature and pressure conditions is successfully visualized with the proposed interferometer. Characteristics of the density field patterns are observed near the critical point and in liquid-like and gas-like conditions. It is demonstrated that the sensitivity of the density (i.e., refractive index) to temperature changes is different for each condition. The transient heat transfer under gas-like condition is evaluated by the interferometer, and numerical simulations with 3D model are performed to evaluate the experimental results. Finally, the interference fringes pattern obtained by the interferometer is shown to be qualitatively in good agreement with the numerical temperature field change. Additionally, transient variations of optical path length difference obtained in the experiment, which means apparent temperature distribution, were compared with numerical simulations. Experimental results are quantitatively in good agreement with the numerical results under a thermal diffusivity of order 10−8 m2/s, confirming the feasibility of the proposed measurement technique for the transient heat transfer in sCO2.

  3. A study of temperature distribution using a combination of near-infrared laser, gold nanorods, and surface cooling 査読有り

    Akiyoshi Obonai, Takuma Kogawa, Yuki Kanda, Oluwatobi S. Oluwafemi, Tetsuya Kodama, Atsuki Komiya

    Applied Thermal Engineering 120579-120579 2023年4月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.applthermaleng.2023.120579  

    ISSN:1359-4311

  4. High-performance polymer-based regenerative elastocaloric cooler 査読有り

    Gael Sebald, Giulia Lombardi, Gildas Coativy, Jacques Jay, Laurent Lebrun, Atsuki Komiya

    Applied Thermal Engineering 223 120016-120016 2023年3月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.applthermaleng.2023.120016  

    ISSN:1359-4311

  5. NIR-II window absorbing graphene oxide-coated gold nanorods and graphene quantum dot-coupled gold nanorods for photothermal cancer therapy

    Thabang C. Lebepe, Sundararajan Parani, Rodney Maluleke, Vuyelwa Ncapayi, Olanrewaju A. Aladesuyi, Atsuki Komiya, Tetsuya Kodama, Oluwatobi S. Oluwafemi

    Nanotechnology Reviews 12 (1) 2023年1月1日

    出版者・発行元:Walter de Gruyter GmbH

    DOI: 10.1515/ntrev-2022-0541  

    eISSN:2191-9097

    詳細を見る 詳細を閉じる

    Abstract The graphene-based materials have been used as a potential coating material for nanoparticles due to their excellent passivation. Herein, we report for the first time the colloidal stability, photothermal profile, thermal stability, cytotoxicity, and photo-cytotoxicity of graphene quantum dots (GQDs) coupled with the second infrared window (NIR-II) absorbing gold nanorods (AuNRs/GQDs) and compare it to graphene oxide (GO)-coated NIR-II absorbing AuNRs (AuNRs/GO). The composites were achieved by electrostatic interaction of the GO or GQDs with AuNRs. The results revealed that (i) AuNRs/GQDs were more stable in the aqueous phosphate buffer and cell culture media than AuNRs/GO and AuNRs; (ii) GO enhanced the photothermal efficiency of the AuNRs, whereas GQDs reduced it; (iii) GQDs enhanced the photothermal stability of AuNRs than GO; (iv) both AuNRs/GO and AuNRs/GQDs were biocompatible with mouse colon carcinoma (C26) cell lines and malignant fibrous histiocytoma‐like, expressing a fusion of the luciferase and enhanced green fluorescent protein genes (KM-Luc/GFP) cell lines; and (v) photo-cytotoxicity of AuNRs/GO and AuNRs/GQDs conducted against C26 cell lines showed significantly improved cell death compared to laser irradiation alone; however, AuNRs/GO exhibited high photo-toxicity than AuNRs/GQDs. This study shows that AuNRs/GO and AuNRs/GQDs composites possess unique properties to improve AuNRs and be utilised in photothermal applications.

  6. Scaling Up Thermodiffusive Separation through a Microchannel 査読有り

    Booklet of 23rd Australasian Fluid Mechanics Conference (23AFMC) 438 2022年12月

  7. Experimental visualization on ionic liquids interfacial absorption process of CO2 by pixelated-array masked phase-shifting interferometry 査読有り

    Lin Chen, Qixian Wu, Qiaoge Zhang, Yongchang Feng, Yuki Kanda, Atsuki Komiya

    Energy Reports 8 62-71 2022年12月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.egyr.2022.10.196  

    ISSN:2352-4847

  8. Preliminary measurements of transient boundary heat transfer process under supercritical pressures using pixelated phase-shifting interferometry 査読有り

    Yizhi Zhang, Lin Chen, Qixian Wu, Dong Yang, Yuki Kanda, Jinguang Zang, Atsuki Komiya, Yanping Huang

    International Communications in Heat and Mass Transfer 138 106396-106396 2022年11月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.icheatmasstransfer.2022.106396  

    ISSN:0735-1933

  9. Quantitative visualization of injection jet flow behaviors of transcritical and supercritical processes by pixelated phase-shifting interferometer 査読有り

    Dong Yang, Lin Chen, Yuki Kanda, Atsuki Komiya, Haisheng Chen

    Experimental Thermal and Fluid Science 139 110729-110729 2022年11月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.expthermflusci.2022.110729  

    ISSN:0894-1777

  10. Supercritical fluid remediation for soil contaminants: Mechanisms, parameter optimization and pilot systems 査読有り

    Lin Chen, Jahongir Hasanov, Jiaxiang Chen, Yongchang Feng, Yuki Kanda, Atsuki Komiya

    The Journal of Supercritical Fluids 189 105718-105718 2022年10月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.supflu.2022.105718  

    ISSN:0896-8446

  11. Low-energy activation of large convective heat transfer via flow resonance triggered by impinging jet 査読有り

    Juan F. Torres, Naoto Ogasawara, Takuma Koizumi, Yuki Kanda, Atsuki Komiya

    International Journal of Heat and Mass Transfer 195 123036-123036 2022年10月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.ijheatmasstransfer.2022.123036  

    ISSN:0017-9310

  12. Quantitative visualization of the thermal boundary layer of forced convection on a heated or cooled flat plate with 30 degrees of leading edge using a Mach-Zehnder interferometer 査読有り

    Jun Liu, Atsuki Komiya

    Journal of Flow Control, Measurement & Visualization 10 (04) 99-116 2022年9月

    出版者・発行元:Scientific Research Publishing, Inc.

    DOI: 10.4236/jfcmv.2022.104007  

    ISSN:2329-3322

    eISSN:2329-3330

  13. Evaluation of Heat Transfer Mechanism in Natural Convection Boundary Layer Perturbated by a Local Mixed Convection Regime 査読有り

    Takuma Koizumi, Juan F. Torres, Yuki Kanda, Atsuki Komiya

    Proceedings of 12th Australasian Heat and Mass Transfer Conference (12AHMTC) 61 2022年6月

  14. Effect of fluid flow on heat transfer in elastocaloric cooling systems 国際共著 査読有り

    Xuen Sze Way, Gael Sebald, Yuki Kanda, Atsuki Komiya

    Proceedings of the 32nd International Symposium on Transport Phenomena (ISTP-32) 187 2022年3月

  15. Evaluation of the interaction between neighboring microchannels in boiling heat transfer 査読有り

    Kazuya Murakami, Yuki Kanda, Atsuki Komiya

    Proceedings of the 32nd International Symposium on Transport Phenomena (ISTP-32) 132 2022年3月

  16. Experimental evaluation of membrane pore pattern on the protein diffusion 国際共著 査読有り

    Ruiyao Zhu, Ryo Watanabe, Yuki Kanda, Juan Felipe Torres Alvarez, Sébastien Livi, Atsuki Komiya

    Proceedings of the 32nd International Symposium on Transport Phenomena (ISTP-32) 134 2022年3月

  17. Evaluation of convective and radiative heat transfer for the therapeutic development using near-indrared laser and gold nanorod 国際共著 査読有り

    Akiyoshi Obonai, Yuki Kanda, Oluwatobi Oluwafemi, Tetsuya Kodama, Atsuki Komiya

    Proceedings of the 32nd International Symposium on Transport Phenomena (ISTP32) 131 2022年3月

  18. Asymptotic analysis of boundary thermal-wave process near the liquid–gas critical point 国際共著 査読有り

    Lin Chen, Rui Zhang, Yuki Kanda, Dipankar N. Basu, Atsuki Komiya, Haisheng Chen

    Physics of Fluids 34 (3) 036102-036102 2022年3月

    出版者・発行元:None

    DOI: 10.1063/5.0086516  

    ISSN:1070-6631

    eISSN:1089-7666

  19. Estimation of radiative thermal conductivity of glass wool using high precision GHP apparatus 査読有り

    Fuhui GUO, Takuma KOGAWA, Atsuki KOMIYA, Shigenao MARUYAMA

    Transactions of the JSME (in Japanese) 88 (908) 21-00340 2022年

    出版者・発行元:Japan Society of Mechanical Engineers

    DOI: 10.1299/transjsme.21-00340  

    eISSN:2187-9761

  20. Multi-objective Bayesian topology optimization of a lattice-structured heat sink in natural convection 査読有り

    Koji Shimoyama, Atsuki Komiya

    Structural and Multidisciplinary Optimization 65 (1) 2022年1月

    出版者・発行元:None

    DOI: 10.1007/s00158-021-03092-x  

    ISSN:1615-147X

    eISSN:1615-1488

  21. Measurement of transient transport process of different molecules across mixed fiber (CA-CN) membrane by pixelated-array masked phase-shifting interferometer 国際共著 査読有り

    Lin Chen, Qiaoge Zhang, Qixian Wu, Dong Yang, Gang Zeng, Yizhi Zhang, Atsuki Komiya

    Experimental Thermal and Fluid Science 130 110490-110490 2022年1月

    出版者・発行元:None

    DOI: 10.1016/j.expthermflusci.2021.110490  

    ISSN:0894-1777

  22. High Grashof number turbulent natural convection on an infinite vertical wall 国際共著 査読有り

    Junhao Ke, N. Williamson, S.W. Armfield, A. Komiya, S.E. Norris

    Journal of Fluid Mechanics 929 A15 2021年12月25日

    出版者・発行元:None

    DOI: 10.1017/jfm.2021.839  

    ISSN:0022-1120

    eISSN:1469-7645

  23. Graphene Oxide-Gold Nanorods Nanocomposite-Porphyrin Conjugate as Promising Tool for Cancer Phototherapy Performance 国際共著 査読有り

    Thabang Calvin Lebepe, Sundararajan Parani, Vuyelwa Ncapayi, Rodney Maluleke, Grace It Mwad Mbaz, Olufunto Tolulope Fanoro, Jose Rajendran Varghese, Atsuki Komiya, Tetsuya Kodama, Oluwatobi Samuel Oluwafemi

    Pharmaceuticals 14 (12) 1295-1295 2021年12月11日

    出版者・発行元:None

    DOI: 10.3390/ph14121295  

    eISSN:1424-8247

  24. Numerical analysis of gas production from large-scale methane hydrate sediments with fractures 査読有り

    Yongchang Feng, Lin Chen, Yuki Kanda, Anna Suzuki, Atsuki Komiya, Shigenao Maruyama

    Energy 236 121485-121485 2021年12月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.energy.2021.121485  

    ISSN:0360-5442

  25. Measurement of dynamic wetting using phase-shifting imaging ellipsometer: comparison of pure solvent and nanoparticle suspension on film thickness profile, apparent contact angle, and precursor film length 査読有り

    Eita Shoji, Takahiro Kaneko, Tatsuya Yonemura, Masaki Kubo, Takao Tsukada, Atsuki Komiya

    Experiments in Fluids 62 (10) 2021年10月

    出版者・発行元:None

    DOI: 10.1007/s00348-021-03296-3  

    ISSN:0723-4864

    eISSN:1432-1114

  26. Effect of gas radiation-depended natural convection on the transition of spatially developing boundary layers 査読有り

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    International Journal of Heat and Mass Transfer 177 121580-121580 2021年10月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.ijheatmasstransfer.2021.121580  

    ISSN:0017-9310

    詳細を見る 詳細を閉じる

    In this study, the effect of natural convection affected by gas radiation on a spatially developing boundary layer was investigated through large-eddy simulations to evaluate the interaction between natural convection and thermal radiation in an open environment, wherein Tollmien–Schlichting instabilities dominate. The gas radiation was calculated using the discrete ordinate method considering gray gas as the medium, and the effect of the absorption coefficient of the medium on the boundary layer has been discussed. With gray gas medium with small and large absorption coefficient values, a turbulent boundary layer was observed, while with intermediate absorption coefficient values, little turbulence was observed. As the gas heated due to radiation, the thermal boundary layer thickness increased. With the thickening of the thermal boundary layer, the magnitude of the velocity gradient at the inflection point decreased, stabilizing the flow and damping the thermal boundary layer fluctuations owing to the Tollmien–Schlichting mechanism. The transition to turbulence of the boundary layer could be reduced when the fluid far from the heated wall was heated through thermal radiation and the shear stress at the infection point decreased. These results provide insights for the control of turbulence for natural convection.

  27. Dynamic imaging and analysis of transient mass transfer process using pixelated-array masked phase-shifting interferometry 国際共著 査読有り

    Qixian Wu, Lin Chen, Atsuki Komiya

    International Journal of Heat and Mass Transfer 174 121339-121339 2021年8月

    出版者・発行元:None

    DOI: 10.1016/j.ijheatmasstransfer.2021.121339  

    ISSN:0017-9310

  28. Resonance-driven heat transfer enhancement in a natural convection boundary layer perturbed by a moderate impinging jet 国際共著 査読有り

    Naoto Ogasawara, Juan F. Torres, Yuki Kanda, Takuma Kogawa, Atsuki Komiya

    Physical Review Fluids 6 (6) L061501 2021年6月17日

    出版者・発行元:None

    DOI: 10.1103/physrevfluids.6.l061501  

    eISSN:2469-990X

  29. Numerical investigation on hot water injection process along fractures of methane hydrate reservoirs 国際共著 査読有り

    Yongchang Feng, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 42 (3) 663-667 2021年3月

  30. Numerical Simulation of Laminar-Turbulent Transition in Magnetohydrodynamic Convection in an Electromagnetically Levitated Molten Droplet of Cu-Co Alloys Under a Static Magnetic Field 査読有り

    Eita Shoji, Koki Tanada, Ryuji Takahashi, Shosei Isogai, Rikuto Suzuki, Masaki Kubo, Takao Tsukada, Atsuki Komiya, Hiroyuki Fukuyama

    Metallurgical and Materials Transactions B 52 (2) 896-902 2021年2月16日

    出版者・発行元:Springer Science and Business Media LLC

    DOI: 10.1007/s11663-021-02063-3  

    ISSN:1073-5615

    eISSN:1543-1916

  31. Three-dimensional coupled photon and bioheat transport simulation for laser induced photothermal therapy 査読有り

    Takuma Kogawa, Yousuke Nakamura, Soma Taniguchi, Hisashi Nakajima, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama, Atsushi Sakurai

    Heat Transfer Research 52 (5) 45-62 2021年

    出版者・発行元:Begell House

    DOI: 10.1615/heattransres.2021036835  

    ISSN:1064-2285

    詳細を見る 詳細を閉じる

    Recently, selective heating techniques by laser therapy have been proposed. Among them, laser therapy adopting metallic nanoparticles has garnered att ention. By injecting metallic nanoparticles inside a tissue, high absorption can be achieved by the local surface plasmonic resonance at the surface of the nanoparticle. In particular, gold nanorods exhibit signifi cantly high resonance against laser and their eff ectiveness has been investigated experimentally. However, the modeling of laser therapy by gold nanorods is limited, and a quantitative numerical simulation is required to further investigate the possibility of eff ective heating by gold nanorods. To investigate the eff ectiveness of selective heating by laser therapy with gold nanorods, a three-dimensional calculation of laser therapy is performed in this study. To model the thermal conduction and propagation of laser inside a tissue, the Pennes bio-heat transfer equation is applied. The radiative heat transfer is calculated using the radiation element method. The dispersion eff ect of gold nanorod injection is considered. Comparing the thermal damage between gold nanorod injection and noninjection cases, the performance of selective heating by gold nanorods is evaluated. Furthermore, the eff ect of gold nanorod injection location on the thermal damage is discussed. Numerical calculation results indicate that gold nanorod injection enables selective heating against the target as well as noninvasive heating on the tissue surface. Furthermore, the heating depth can be controlled by changing the injection location appropriately.

  32. Numerical Investigation for the Temperature Dependency of Coke Degradation by CO<sub>2</sub> Gasification Reaction in a Blast Furnace 査読有り

    Yui Numazawa, Yohsuke Matsushita, Hideyuki Aoki, Atsuki Komiya

    ISIJ International 60 (12) 2686-2694 2020年12月15日

    出版者・発行元:Iron and Steel Institute of Japan

    DOI: 10.2355/isijinternational.isijint-2020-198  

    ISSN:0915-1559

    eISSN:1347-5460

  33. A review analysis of gas hydrate tests: engineering progress and policy trend 査読有り

    Lin Chen, Sukru Merey, Ingo Pecher, Junnosuke Okajima, Atsuki Komiya, Juan Diaz-Naveas, Shouding Li, Shigenao Maruyama, Sain Kalachand, Bjørn Kvamme, Richard Coffin

    Environmental Geotechnics 1-17 2020年12月10日

    出版者・発行元:Thomas Telford Ltd.

    DOI: 10.1680/jenge.19.00208  

    eISSN:2051-803X

  34. Optical Method for Simultaneous High-Resolution Measurement of Heat and Fluid Flow: The Case of Rayleigh-Bénard Convection 査読有り

    Juan F. Torres, Yongling Zhao, Shuqi Xu, Zhengyu Li, Atsuki Komiya

    Physical Review Applied 14 (5) 2020年11月17日

    出版者・発行元:American Physical Society (APS)

    DOI: 10.1103/physrevapplied.14.054038  

    eISSN:2331-7019

  35. Law of the wall for a temporally evolving vertical natural convection boundary layer 査読有り

    Junhao Ke, Nicholas Williamson, S.teven W. Armfield, Stuat E. Norris, Atsuki Komiya

    Journal of Fluid Mechanics 902 A31 2020年11月10日

    出版者・発行元:Cambridge University Press (CUP)

    DOI: 10.1017/jfm.2020.621  

    ISSN:0022-1120

    eISSN:1469-7645

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    <title>Abstract</title> <fig position="anchor"> <graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" position="float" xlink:href="S0022112020006217_figAb.png" /> </fig>

  36. 高精度GHPを用いた多孔質断熱材の熱伝導率高精度計測とその要素分類 査読有り

    郭 福会, 古川琢磨, 小柳秀太, 大澤啓志, 小宮敦樹, 圓山重直

    日本機械学会論文集 86 (892) 20-00201 2020年11月

    出版者・発行元:None

    DOI: 10.1299/transjsme.20-00201  

    eISSN:2187-9761

  37. Investigation of Convective Boiling Phenomena in Layered-parallel Microchannels 査読有り

    Yusuke Nishimura, Yuki Kanda, Junnosuke Okajima, Atsuki Komiya

    Proceedings of the 31st International Symposium on Transport Phenomena (ISTP-31) ISTP15 2020年10月

  38. Numerical investigation on gas production from Shenhu (China): Influence of layer inclination and horizontal inhomogeneities 査読有り

    Lin Chen, Yongchang Feng, Sukru Merey, Koorthedath Pullayikodi Lijith, Devendra N. Singh, Atsuki Komiya, Shigenao Maruyama

    Journal of Natural Gas Science and Engineering 82 103509-103509 2020年10月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.jngse.2020.103509  

    ISSN:1875-5100

  39. Output density quantification of electricity generation by flowing deionized water on graphene 査読有り

    Kei Kuriya, Kotaro Ochiai, Golap Kalita, Masaki Tanemura, Atsuki Komiya, Gota Kikugawa, Taku Ohara, Ichiro Yamashita, Fumio S. Ohuchi, M. Meyyappan, Seiji Samukawa, Katsuyoshi Washio, Takeru Okada

    Applied Physics Letters 117 (12) 123905-123905 2020年9月21日

    出版者・発行元:AIP Publishing

    DOI: 10.1063/5.0018862  

    ISSN:0003-6951

    eISSN:1077-3118

  40. Simulation of gas production from hydrate reservoir (AT1) of Eastern Nankai Trough Japan 査読有り

    Yongchang Feng, Lin Chen, Sukru Merey, K P Lijith, Devendra N Singh, Atsuki Komiya, Shigenao Maruyama

    Environmental Geotechnics 1-9 2020年4月1日

    出版者・発行元:Thomas Telford Ltd.

    DOI: 10.1680/jenge.19.00177  

    eISSN:2051-803X

  41. Visualization of methane hydrate decomposition interface and analyses of decomposition rate and interfacial configuration 査読有り

    Yuki Kanda, Junnosuke Okajima, Shigenao Maruyama, Atsuki Komiya

    Physics of Fluids 32 (4) 047105-047105 2020年4月1日

    出版者・発行元:AIP Publishing

    DOI: 10.1063/5.0002641  

    ISSN:1070-6631

    eISSN:1089-7666

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    © 2020 Author(s). Composed of methane gas and cage-like water molecules, methane hydrate is expected to have innovative engineering applications, such as gas transportation. In this study, a methane hydrate decomposition interface is visualized qualitatively, and the decomposition rate is discussed. To clarify the decomposition mechanism, consideration is given to the dynamic decomposition interface and the variation of the decomposition rate. In the present experiment, methane hydrate is formed around a water droplet and decomposed by depressurization in the gas phase, the dynamic variation of the decomposition interface is observed precisely using a high-resolution camera, and three different depressurization conditions are used to confirm the interfacial change. It is found that the decomposition rate and dynamic shape change of the decomposition interface depend on the difference between the equilibrium pressure and that of the gas phase. In addition, the decomposition time is discussed using the decomposition model, and it is estimated that the present experimental decomposition rate corresponds to a lower activation energy for decomposition compared with that of the model by other authors. It is assumed that the decomposition proceeds under nearly reaction-limited conditions. Additionally, the interfacial deformation and collapse are observed in the case of pressure reduction near the equilibrium pressure, and validation is provided by a numerical simulation considering the heat and mass transfer near the interface. The numerical results suggest that the decomposition is affected by the interfacial configuration and the nearby temperature and concentration distributions.

  42. Evaluation of forced convective boiling heat transfer with layered parallel microchannels 査読有り

    Yusuke NISHIMURA, Junnosuke OKAJIMA, Takuya OOUCHI, Atsuki KOMIYA

    Journal of Thermal Science and Technology 15 (1) JTST0006-JTST0006 2020年

    出版者・発行元:Japan Society of Mechanical Engineers

    DOI: 10.1299/jtst.2020jtst0006  

    eISSN:1880-5566

  43. Regenerative cooling using elastocaloric rubber: Analytical model and experiments 査読有り

    Sebald, G., Komiya, A., Jay, J., Coativy, G., Lebrun, L.

    Journal of Applied Physics 127 (9) 2020年

    DOI: 10.1063/1.5132361  

  44. Evaluation of rate-determining step of methane hydrate decomposition by measurement of transient heat and mass transfer near solid–gas interface 査読有り

    Kanda, Y., Komatsu, H., Okajima, J., Maruyama, S., Komiya, A.

    International Journal of Heat and Mass Transfer 149 119191 2020年

    DOI: 10.1016/j.ijheatmasstransfer.2019.119191  

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    © 2019 The transient heat and mass transfer near a methane hydrate decomposition interface were quantitatively measured to evaluate the rate-determining factors of dissociation with high spatiotemporal resolution. In this study, we proposed a measurement system for the dissociation phenomenon near the hydrate interface, and the rate-determining step of the dissociation phenomenon was discussed in terms of the experimental results and numerical simulation using a dissociation model. The hydrate was generated around a water-like film under temperature of 274 K and pressure of 4.8 MPa of mixed gas comprising methane and helium in a temperature and pressure controlled system. A high-speed phase-shifting interferometer was used to measure the interfacial transient heat and mass transfer. In the present study, transient variations in the optical path length difference caused by the variation in the density field near the hydrate interface were visualized with temporal and spatial resolutions of 1 ms and 3.88 μm/pixel, respectively. The measured values were compared with the results of numerical simulations, assuming that the mass flux of methane was a function of the activation energy of dissociation. The comparison showed that the experimentally measured values exhibited similar tendency as the values estimated using the activation energy of approximately 60,000 J/mol. This result was also confirmed from the interface shape variation of the hydrate. Finally, the dissociation phenomenon of the hydrate was estimated as the rate-determining step of the reaction by using our special interferometer system.

  45. Evaluation of the Relations between Hindered Diffusion Process of Protein and Membrane Structure 査読有り

    Atsuki Komiya, Ryo Watanabe, Hani Alkitabi Aldaftari, Shuichi Moriya, Sébastien Livi

    Extended Abstracts of The Second Pacific Rim Thermal Engineering Conference PRTEC-24440 2019年12月

  46. Novel measurement method of total emissivity by using guarded hot plate method 査読有り

    Shuta Koyanagi, Junnosuke Okajima, Shigenao Maruyama, Atsuki Komiya

    Proceedings of the 30th International Symposium on Transport Phenomena S1-ISTP148 2019年11月

  47. Visualization of methane hydrate decomposition surface and analyses of methane dissociation rate and interface configuration 査読有り

    Yuki Kanda, Junnosuke Okajima, Shigenao Maruyama, Atsuki Komiya

    Proceedings of the 30th International Symposium on Transport Phenomena S1-ISTP139 2019年11月

  48. High-.speed Interferometric Measurement of Interfacial Heat Transfer with Arbaa Prism 査読有り

    Yuki Kanda, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 12th Asian Thermophysical Properties Conference 2019年10月

  49. Thermo-fluid Dynamic Design Exploration of a Double Pipe Heat Exchanger 査読有り

    Tomohiro Hirano, Mitsuo Yoshimura, Koji Shimoyama, Atsuki Komiya

    Proceedings of the ASME-JSME-KSME 2019 Joint Fluids Engineering Conference AJKFLUIDS2019-4998 2019年7月

  50. プラズマファインバブルの生成と計測 査読有り

    佐藤 岳彦, 金澤 誠司, 大谷 清伸, 小宮 敦樹, 金子 俊郎, 中嶋 智樹, ティンガリー マーク, ファーラット モハメッド, 上原 聡司, 熊谷 諒, 宮原 高志, 大泉 雅伸, 中谷 達行, 落合 史朗, 宮崎 孝道, 藤田 英理

    混相流 33 (4) 382-389 2019年

    出版者・発行元:日本混相流学会

    DOI: 10.3811/jjmf.2019.T016  

    ISSN:0914-2843

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    <p>Fine bubbles generated by plasma in water that we named as "Plasma Fine Bubbles," have high potential to generate long-life ultrafine bubbles due to electrical charges. It is shown that the residual bubbles formed by collapse of streamer gas channels which show a similar process of cavitation bubbles in various points such as growth, shrink, collapse, rebound, and fragmentation. There are also introductions about ultrafine bubbles measured by a dynamic laser scattering method, amount of electrical charge of plasma fine bubbles estimated by analyzing their movements under application of an intense electric field strength, evidence of hydrogen gas generation in laser/spark induced bubbles and a distinguishing method for between gas bubbles and solid particles.</p>

  51. The effect of contact force during radiofrequency catheter ablation using a vibrating catheter: New cooling method for catheter ablation 国際誌 査読有り

    Yu, K., Yamashita, T., Shingyochi, S., Matsumoto, K., Komiya, A., Ohta, M.

    Technology and Health Care 27 (6) 589-601 2019年

    DOI: 10.3233/THC-191639  

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    BACKGROUND: A new cooling method is proposed for preventing electrode-tissue overheating during cardiac catheter ablation using a vibrating catheter. Previous work has shown that vibration that results from increased flow velocity around the catheter can have a cooling effect on the electrode. OBJECTIVE: Contact force has been shown to be an important factor that affects cooling and lesion formation, because contact force determines the ratio of power delivery between blood and tissue. In this study, the effect of contact force on electrode cooling and tissue heating was investigated during the operation of an electrode cooled by vibration. METHODS: Using PVA-H or myocardium ablation tissue models under conditions of no flow, electrode and tissue temperatures and lesion sizes were measured at various vibrational frequencies and contact force conditions. RESULTS: The experiments showed that the catheter vibration still decreases the electrode temperature over a contact force range of 2-30 gf. The lesion size was increased with increasing contact force at each vibrational frequency. CONCLUSIONS: Increasing contact force can increase lesion size with cooling by vibration remaining effective.

  52. Formation of fine bubbles by plasma in water 査読有り

    Sato, T., Uehara, S., Kumagai, R., Miyahara, T., Oizumi, M., Nakatani, T., Ochiai, S., Miyazaki, T., Fujita, H., Kanazawa, S., Ohtani, K., Komiya, A., Kaneko, T., Nakajima, T., Tinguely, M., Farhat, M.

    International Journal of Plasma Environmental Science and Technology 12 (2) 2019年

  53. Three-step phase-shifting imaging ellipsometry to measure nanofilm thickness profiles 査読有り

    Shoji, E., Komiya, A., Okajima, J., Kubo, M., Tsukada, T.

    Optics and Lasers in Engineering 112 145-150 2019年

    DOI: 10.1016/j.optlaseng.2018.09.005  

  54. Numerical analysis of gas production from layered methane hydrate reservoirs by depressurization 査読有り

    Feng, Y., Chen, L., Suzuki, A., Kogawa, T., Okajima, J., Komiya, A., Maruyama, S.

    Energy 166 1106-1119 2019年

    DOI: 10.1016/j.energy.2018.10.184  

    ISSN:0360-5442

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    Many natural methane hydrate (MH) reservoirs are heterogeneous and are characterized by a layered structure. In this study, we numerically investigate gas production from a multi-layered hydrate reservoir by depressurization through a single vertical and a single horizontal well. This layered MH reservoir is constructed based on field test data at the AT1 site of the Eastern Nankai Trough in Japan, and involves three hydrate-bearing layers (HBLs): Upper HBL-1, middle HBL-2, and lower HBL-3. The simulation results indicate that the horizontal well shows a better gas production performance in comparison to the vertical well. Over a production duration of two years, the average gas production rate by using the horizontal well reached 7.3 × 104 ST m3/d, which is 5.7 times higher than that by using the vertical well. However, the gas-to-water ratio for both the vertical and horizontal well cases is low in absolute terms. Sensitivity analysis of gas production by the horizontal well indicates that both the very higher and lower levels of permeability in HBL-2 and hydrate saturation in HBL-3 are unfavorable for long-term gas production. In addition, decrease of vertical permeability in HBL-1 and HBL-3 can lead to lower gas production efficiency.

  55. Experimental evaluation of thermal radiation effects on natural convection with a Rayleigh number of 10<sup>8</sup>–10<sup>9</sup> by using an interferometer 査読有り

    Kogawa, T., Shoji, E., Okajima, J., Komiya, A., Maruyama, S.

    International Journal of Heat and Mass Transfer 132 1239-1249 2019年

    DOI: 10.1016/j.ijheatmasstransfer.2018.11.162  

    ISSN:0017-9310

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    In this study, the radiation effects on the temperature field and perturbation of the thermal boundary layer of natural convection for gas were evaluated by an interferometer. The natural convection investigated in this study was that of a cavity, which had differentially heated vertical walls, surrounded by adiabatic walls. The target Rayleigh number was of the order of 108–109. By using the interferometer adopted in a phase-shifting technique, surface and gas radiation effects were evaluated. To compare the experimental results, a numerical calculation was also conducted using a large-eddy simulation coupled with radiative heat transfer. By varying the emissivity of the adiabatic walls while maintaining the emissivity of the isothermal walls, the surface radiation effect on the natural convection was analyzed. To neglect the gas radiation effect, air was used as the working fluid. When the adiabatic walls were black-body surfaces, the temperature difference around the adiabatic walls was higher than that of the reflective surface as a result of the optical path difference. From this result, the high temperature difference due to the surface radiation effect was confirmed. To investigate the gas radiation effect on natural convection, trifluoromethane gas, which has significant radiative absorption, was used as a working fluid. By evaluating the interference fringe by the interferometer, the wave motion of the thermal boundary layer around the heated and adiabatic walls was visualized. Comparing the numerical calculation results (when varying the calculation conditions) revealed that the wave motion and turbulence boundary layer around the heated and adiabatic walls were caused by the gas radiation effect.

  56. Thermo-fluid dynamic design optimization of a concentric tube heat exchanger 査読有り

    Hirano, T., Yoshimura, M., Shimoyama, K., Komiya, A.

    Journal of Fluid Science and Technology 14 (2) JFST0011 2019年

    DOI: 10.1299/JFST.2019JFST0011  

  57. Radiative control through greenhouse covering materials using pigmented coatings 査読有り

    Aldaftari, H.A., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Quantitative Spectroscopy and Radiative Transfer 231 29-36 2019年

    DOI: 10.1016/j.jqsrt.2019.04.009  

  58. Numerical analysis of gas production from reservoir-scale methane hydrate by depressurization with a horizontal well: The effect of permeability anisotropy 査読有り

    Feng, Y., Chen, L., Suzuki, A., Kogawa, T., Okajima, J., Komiya, A., Maruyama, S.

    Marine and Petroleum Geology 102 817-828 2019年

    DOI: 10.1016/j.marpetgeo.2019.01.041  

    ISSN:0264-8172

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    Methane hydrate (MH) is regarded as one of the potential and substantial energy resources. The permeability of hydrate-bearing layer (HBL) can potentially influence heat and mass transfer during hydrate dissociation by depressurization. In this study, a reservoir-scale MH model was constructed to investigate the effect of permeability anisotropy on gas production behaviors by depressurization with a horizontal well. The numerical results indicate that permeability anisotropy can initially negatively influence the hydrate dissociation and gas production, but later promote the process. Meanwhile, permeability anisotropy can lead to an increase of ratio of gas phase to total production and gas-to-water ratio during long-term gas production. Moreover, permeability anisotropy can enhance the horizontal flow and the dissociation reaction in the top part of the HBL for a long period, but also leads to an increase of accumulated free gas in the reservoir. Furthermore, the comparison of horizontal well production and vertical well production indicates that the horizontal well can increase the gas production by one order of magnitude than that of vertical well during a production period of 360 days, and permeability anisotropy appears to have less effect on gas production in the initial short stage when using the vertical well.

  59. Enhancement of gas production from methane hydrate reservoirs by the combination of hydraulic fracturing and depressurization method 査読有り

    Feng, Y., Chen, L., Suzuki, A., Kogawa, T., Okajima, J., Komiya, A., Maruyama, S.

    Energy Conversion and Management 184 194-204 2019年

    DOI: 10.1016/j.enconman.2019.01.050  

    ISSN:0196-8904

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    The combination of hydraulic fracturing and depressurization method has been proposed to enhance gas production efficiency from methane hydrate (MH) reservoirs. To evaluate the efficacy of this method, we construct a fractured MH reservoir model and investigate by means of numerical simulation the gas production behaviors under two different temperature conditions. The simulation results indicate that the combination of hydraulic fracturing and depressurization method is more efficient for gas production than the single depressurization method. For the high-temperature reservoir, the hydrate dissociation and gas production during the early depressurization stage can be significantly enhanced after fracturing, and the effect of increasing the size and permeability of the fractured zone on gas production rate is more remarkable in the early depressurization stage than in the late depressurization stage. For the low-temperature reservoir, while the improvement in hydrate dissociation and gas production by fracturing is dramatic during the entire depressurization period, the increment in total gas production is very low in absolute terms. In addition, gas production from low-temperature reservoir is very sensitive to initial temperature, and increasing the reservoir temperature can enhance the benefits of fracturing.

  60. Effects of concentration of participating media on turbulent natural convection in cubic cavity 査読有り

    Kogawa, T., Chen, L., Okajima, J., Sakurai, A., Komiya, A., Maruyama, S.

    Applied Thermal Engineering 131 141-149 2018年2月

    出版者・発行元:Elsevier Ltd

    DOI: 10.1016/j.applthermaleng.2017.11.135  

    ISSN:1359-4311

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    To use and understand the large-scale natural convection in the building and systems, heat transfer analysis of the natural convection with radiation is important. The radiation effect is influenced by concentration of the participating media in the considered system. In this study, an effects of concentration of participating media on turbulent natural convection inside a cubic cavity were investigated. The turbulence effect was modeled by large eddy simulation. Further, the radiative heat transfer was calculated by the radiation element method using the ray emission model. In addition, the gas radiation was modeled by the full-spectrum k-distribution method. By varying the partial pressures of H2O and CO2, the effect of the participating media were evaluated. From the calculation, gas radiation effects affected the flow instability and restrained the temperature stratification when the concentration of the participating media was higher. However, the convective heat transfer have not been affected by the significant flow instability by the radiation effects.

  61. Oceanic methane hydrate utilization system design and reservoir scale numerical modeling,海洋可燃冰采掘利用系统设计及储层尺度的数值模拟 査読有り

    Chen, L., Feng, Y., Yamada, H., Kanda, Y., Okajima, J., Komiya, A., Maruyama, S.

    Kexue Tongbao/Chinese Science Bulletin 63 (31) 3241-3250 2018年

    DOI: 10.1360/N972018-00038  

    ISSN:0023-074X

    eISSN:2095-9419

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    © 2018, Science Press. All right reserved. In recent years, the exploration and utilization of methane hydrate from permafrost and off-coast regions has become a very hot topic. Aiming at its potential as a vast energy resources in future use, the current study is focused on the low emission extraction and utilization system for oceanic methane hydrate and its economic and technological feasibility. In this study, recent real extraction tests in both China and Japan in 2017 are firstly discussed and compared, where the challenges in production period and production rate are explained. In those tests, depressurization method is used to dissociate the methane hydrate for gas production form the unconsolidated reservoir layers below the seabed. Based on the conditions of Japan, a systematic utilization system is proposed for oceanic methane hydratewhich is consisted of extraction system, power generation system, Carbon Capture and Sequestration (CCS) system and hot fluid injection system. Vertical well systems are adopted in this design and the strategic warming up process is used before depressurization extraction, so as to obtain optimal production rate of methane gas. The inclusion of CCS makes it possible to utilize methane hydrate with very low carbon emission. It is estimated that the electricity price obtained by this system can be comparable with the current civil electric price in Japan if the production rate is around 1.0×10 5 m 3 /d. Also in this study, the real extraction scenarios and possible strategies of Nankai Trough in Japan and Shenhu Area in China are re-visited and discussed by numerical models. It is found that the only depressurization or thermal stimulation method have the problems of wellbore deformation, pressure problem and energy efficiency problems, while combined strategic modes show the possibility of long-term continuous production. For the basic dissociation parameter analysis, the conditions near the equilibrium curve show higher production rate, which is due to higher initial reservoir temperature. Such results indicate the importance of heat supply inside the reservoir layer as the methane hydrate dissociation is endothermic. It is shown that with the increase of reservoir pressure, such temperature effects become more critical as the optimal initial temperature increases according to equilibrium curve. This results support the system design with strategic warming-up process in a sister well during methane hydrate extraction. In addition, the effects of reservoir layer thermal management, hot reservoir fluid flow effects on the dissociation behaviors are analyzed in this study. For vertical well analysis, the production rates under different permeability parameters show the same trend with real production, which in turn help confirm the in-lab permeability tests. Horizontal well simulation show the importance of overburden and under burden. If the confining layers are less permeable, the production rate becomes higher due to the limited intrusive water flow from the confining layers. In sum, this study summarized the advantages and disadvantages of oceanic methane hydrate extraction/utilization methods and put forward a low-carbon emission system. It is hoped that this study will contribute to the future development of both production prediction and real extraction tests.

  62. Construction and simulation of reservoir scale layered model for production and utilization of methane hydrate: The case of Nankai Trough Japan 査読有り

    Chen, L., Feng, Y., Kogawa, T., Okajima, J., Komiya, A., Maruyama, S.

    Energy 143 128-140 2018年

    出版者・発行元:Elsevier Ltd

    DOI: 10.1016/j.energy.2017.10.108  

    ISSN:0360-5442

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    This study is focused on the utilization of oceanic methane hydrate as an energy resource under the real production situations of Nankai Trough, Japan. Due to the complex geological conditions and the sensitive thermal-mechanical properties of methane hydrate bearing layers, it is very difficult to extract and utilize the methane hydrate stably and economically. The current status of development in Japan and major challenges from real reservoir-scale analysis are discussed. Low-carbon emission process is discussed and shown into detail with careful numerical modeling procedures. The numerical model is constructed based on the geological conditions of Nankai Trough of Japan. Numerical model is also scaled-up from single thin-layer to thick multi-layer model for real reservoir conditions, based on the recent geological survey data. In the current study, the production behaviors, boundary conditions and reservoir parameter effects are discussed into detail. The predicted production rate level in this simulation agrees with recent real tests. It is found that proper selection of layer models and production strategy is very important for large-scale simulation and prediction. Combined methods and strategic production design are recommended in future real tests.

  63. Precise Measurement of CO2 Absorption Process into Alkanolamine at Gas-liquid Interface 査読有り

    Atsuki Komiya, Toru Saito

    Proceedings of the 29th International Symposium on Transport Phenomena (ISTP-29) paper179 2018年

  64. Visualization of heat and mass transfer near the formation and dissociation interface of CO2 hydrate with high-speed phase-shifting interferometer 査読有り

    Yuki Kanda, Eita Shoji, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    International Heat Transfer Conference 2018-August 8767-8774 2018年

    ISSN:2377-424X

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    © 2018 International Heat Transfer Conference. All rights reserved. In this study, transient heat and mass transfer during CO2 hydrate formation and dissociation processes is visualized quantitatively by a high-speed phase-shifting interferometer. CO2 hydrate has an attractive potential to be used as CO2 capture and storage (CCS) and secondary refrigerant due to the enormous dissociation enthalpy. However, gas hydrate dissociation mechanism including CO2 hydrate has not been well understood due to the complex phase-change and heat and mass transportation at the reaction interface. This study aims to measure CO2 hydrate formation and dissociation process with transient heat and mass transfer in the vicinity of solid-gas interface quantitatively. CO2 hydrate is formed on a liquid film with the pressurized CO2 gas. The experiment is conducted in the temperature controlled pressure vessel with two quartz windows. The dissociation is caused by decreasing the pressure. The transient density distribution in the vicinity of solid-gas interface during the formation and dissociation is measured quantitatively by using the high-speed phase-shifting interferometer. The simulation is performed with the two-dimensional (2D) diffusive equation in the gas phases to validate experimental results. Finally, the CO2 mass concentration and the effect of heat transfer in the gas phase on the formation and dissociation are discussed.

  65. Numerical Study of the Effect of Over/Underburden Permeability on Methane Hydrate Dissociation by Depressurization 査読有り

    Yongchang Feng, Lin Chen, Hikaru Yamada, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 16th International Heat Transfer Conference (IHTC-16) IHTC16-23460 2018年

  66. Experimental Study of Natural Convection in a Cavity: Precise Visualization Method of Temperature Field 査読有り

    Menghua Duan, Lin Chen, Yongchang Feng, Junnosuke Okajima, Atsuki Komiya

    Proceedings of the 16th International Heat Transfer Conference (IHTC-16) IHTC16-22825 2018年

  67. Production behavior and numerical analysis for 2017 methane hydrate extraction test of Shenhu, South China Sea 査読有り

    Chen, L., Feng, Y., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Natural Gas Science and Engineering 53 55-66 2018年

    DOI: 10.1016/j.jngse.2018.02.029  

  68. Report on Microgravity Experiments of Dynamic Surface Deformation Effects on Marangoni Instability in High-Prandtl-Number Liquid Bridges 査読有り

    Yano, T., Nishino, K., Matsumoto, S., Ueno, I., Komiya, A., Kamotani, Y., Imaishi, N.

    Microgravity Science and Technology 30 (5) 1-12 2018年

    出版者・発行元:Springer Netherlands

    DOI: 10.1007/s12217-018-9614-9  

    ISSN:1875-0494 0938-0108

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    This paper reports an overview and some important results of microgravity experiments called Dynamic Surf, which have been conducted on board the International Space Station from 2013 to 2016. The present project mainly focuses on the relations between the Marangoni instability in a high-Prandtl-number (Pr= 67 and 112) liquid bridge and the dynamic free surface deformation (DSD) as well as the interfacial heat transfer. The dynamic free surface deformations of large-scale liquid bridges (say, for diameters greater than 10 mm) are measured with good accuracy by an optical imaging technique. It is found that there are two causes of the dynamic free surface deformation in the present study: the first is the time-dependent flow behavior inside the liquid bridge due to the Marangoni instability, and the second is the external disturbance due to the residual acceleration of gravity, i.e., g-jitter. The axial distributions of DSD along the free surface are measured for several conditions. The critical parameters for the onset of oscillatory Marangoni convection are also measured for various aspect ratios (i.e., relative height to the diameter) of the liquid bridge and various thermal boundary conditions. The characteristics of DSD and the onset conditions of instability are discussed in this paper.

  69. Propagation and branching process of negative streamers in water 査読有り

    Kumagai, R., Kanazawa, S., Ohtani, K., Komiya, A., Kaneko, T., Nakajima, T., Sato, T.

    Journal of Applied Physics 124 (16) 163301 2018年

    DOI: 10.1063/1.5025376  

  70. Visualization of the flow pattern in methane hydrate reservoir model 査読有り

    Yamada, H., Chen, L., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Fluid Science and Technology 13 (4) JFST0028 2018年

    DOI: 10.1299/jfst.2018jfst0028  

  71. Measurement of concentration dependency of diffusion coefficient in ethanol-water solution under different storage condition 査読有り

    Komiya, A., Sato, K., Okajima, J.

    Journal of Fluid Science and Technology 13 (4) JFST0030 2018年

    DOI: 10.1299/jfst.2018jfst0030  

  72. Measurement of Temperature Difference and Transient Flow of Natural Convection Influenced by Thermal Radiation 査読有り

    Takuma Kogawa, Eita Shoji, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 11th Pacific Symposium on Flow Visualization and Image Processing (PSFVIP11) PSFVIP11-083 2017年12月1日

  73. Reflections on the Stability Conditions and Energy Conversion of Supercritical Fluids Based Natural Circulation Loops 査読有り

    Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 7th International Conference on Power and Energy System (ICPES 2017) E104-A 2017年11月1日

  74. Energy System Analysis of a Low CO2 Emission Power Plant Utilizing Oceanic Methene Hydrate with CCS 査読有り

    Tsutomu Watanabe, Lin Chen, Hirotoshi Sasaki, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 7th International Conference on Power and Energy System (ICPES 2017) E105-A 2017年11月1日

  75. Effects of Production Strategy and Operation Parameters on Reservoir Scale Methane Hydrate Dissociation Flows 査読有り

    Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Extend Abstracts of the Ninth JSME-KSME Thermal and Fluids Engineering Conference (TFEC9) TFEC9-1023 2017年10月27日

  76. Radiative Transfer of Pigment Films for Transmission Control 査読有り

    Hani Alkitabi Aldaftari, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Extend Abstracts of the Ninth JSME-KSME Thermal and Fluids Engineering Conference (TFEC9) TFEC9-1452 2017年10月27日

  77. Study on Active Control of Protein Transport Phenomena by Membrane 査読有り

    Atsuki Komiya, Sebastien Livi

    Proceedings of the 28th International Symposium on Transport Phenomena (ISTP-28) paper 54 2017年9月22日

  78. Study on Methane Hydrate as a Future Energy Resource: Low Emission Extraction and Power Generation 査読有り

    Lin Chen, Hikaru Yamada, Yuki Kanda, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 2016 International Conference on New Energy and Future Energy System FES1301 2017年8月19日

  79. Large Scale Numerical Simulation of Methane Hydrate Utilization System with Low Carbon Emission Design 査読有り

    Lin Chen, Yongchang Feng, Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Sigenao Maruyama

    Proceedings of The 12th International Green Energy Conference (IGEC-XII) IGEC2017-080 2017年7月31日

  80. Visualization of inception, propagation and collapse process of underwater positive streamer 査読有り

    Takehiko Sato, Ryo Kumagai, Tomoyuki Nakajima, Kiyonobu Ohtani, Atsuki Komiya, Seiji Kanazawa, Toshiro Kaneko

    Proceedings of the 31st International Symposium on Shock Waves (ISSW31) 2017年7月9日

  81. Simultaneous Measurement of Mass Diffusion Coefficient and Its Concentration Dependency of Ethanol – Water Solution 査読有り

    Kengo Sato, Atsuki Komiya, Junnosuke Okajima, Shigenao Maruyama

    Proceedings of 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHFT9) OC.133 2017年6月12日

  82. Visualization study of supercritical fluid convection and heat transfer in weightlessness by interferometry: A brief review 査読有り

    Bi-Li Deng, Yuki Kanda, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Microgravity Science and Technology 29 (4) 275-295 2017年5月10日

    出版者・発行元:Springer Science and Business Media LLC

    DOI: 10.1007/s12217-017-9546-9  

    ISSN:0938-0108

    eISSN:1875-0494

  83. Coherent regime and far-to-near-field transition for radiative heat transfer 査読有り

    Tsurimaki, Y., Chapuis, P.-O., Okajima, J., Komiya, A., Maruyama, S., Vaillon, R.

    Journal of Quantitative Spectroscopy and Radiative Transfer 187 310-321 2017年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2016.08.006  

    ISSN:0022-4073

    eISSN:1879-1352

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    Radiative heat transfer between two semi-infinite parallel media is analyzed in the transition zone between the near-field and the classical macroscopic, i.e. incoherent far field, regimes of thermal radiation, first for model gray materials and then for real metallic (Al) and dielectric (SiC) materials. The presence of a minimum in the flux-distance curve is observed for the propagative component of the radiative heat transfer coefficient, and in some cases for the total coefficient, i.e. the sum of the propagative and evanescent components. At best this reduction can reach 15% below the far-field limit in the case of aluminum. The far-to-near-field regime taking place for the distance range between the near-field and.the classical macroscopic regime involves a coherent far-field regime. One of its limits can be practically defined by the distance at which the incoherent far-field regime breaks down. This separation distance below which the standard theory of incoherent thermal radiation cannot be applied anymore is found to be larger than the usual estimate based on Wien's law and varies as a function of temperature. The aforementioned effects are due to coherence, which is present despite the broadband spectral nature of thermal radiation, and has a stronger impact for reflective materials. (C) 2016 Elsevier Ltd. All rights reserved.

  84. Influence of radiation effect on turbulent natural convection in cubic cavity at normal temperature atmospheric gas 査読有り

    Kogawa, T., Okajima, J., Sakurai, A., Komiya, A., Maruyama, S.

    International Journal of Heat and Mass Transfer 104 456-466 2017年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.ijheatmasstransfer.2016.08.059  

    ISSN:0017-9310

    eISSN:1879-2189

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    The turbulence structure, boundary layer, and heat transfer of turbulent natural convection, including radiation effects inside the cubic cavity, were investigated in this study. Large eddy simulation was conducted, and Vreman model was adopted for the dynamic subgrid-scale model. To calculate the radiative heat flux efficiently, a coupled calculation method, using the radiation element method by ray emission model, was constructed. To separate the radiation effects of the gas and surface radiations, four calculation conditions have been analyzed; non-radiation, gas radiation, surface radiation, and combined radiation. Observing the vortices structure using the Q value revealed that the surface radiation effect was more dominant for the flow instability than the gas radiation effect. An evaluation of the boundary layers for both the gas and surface radiation effects showed that the flow circulation inside the cubic cavity was enhanced. The surface radiation was dominant in the generation of the shear stress by the turbulent flow. The total heat transfer, which includes the convective and radiative heat transfers, have been investigated. The surface radiation affected on the radiative heat transfer significantly as compared to the gas radiation. The radiation effects changed the radiative heat transfers, while the convective heat transfers of all the calculation conditions were similar. (C) 2016 Elsevier Ltd. All rights reserved.

  85. Development of a guard-heated thermistor probe for the accurate measurement of surface temperature 査読有り

    Okabe, T., Okajima, J., Komiya, A., Maruyama, S.

    International Journal of Heat and Mass Transfer 108 (B) 2283-2292 2017年

    出版者・発行元:Elsevier Ltd

    DOI: 10.1016/j.ijheatmasstransfer.2017.01.072  

    ISSN:0017-9310

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    It is difficult to accurately measure the absolute value of the surface temperature of a material through ordinary methods such as with a thermocouple or a thermistor. This is due to heat loss along the electrical lead wires of the component, which causes conduction error and can ultimately influence the results. In this paper, we propose a thermistor probe that utilizes a guard heater. The goal of this design is to obtain an accurate measurement of the surface temperature of a material at a higher temperature than the ambient temperature. The probe consists of two thermistors, each with a diameter of 0.43 mm. One thermistor was utilized for the temperature sensor, while the other was used with the guard heater to minimize heat loss, and inserted into a fluorinated ethylene propylene (FEP) tube. The guard heater was placed above a half-exposed thermistor, and operated as both a sensor and a heater in order to minimize the temperature difference between the two thermistors. To evaluate the minimization of heat loss along the thermistor's lead wires in a surface temperature measurement, experiments were conducted with the surface of an aluminum block heated to 35.00 �C in two scenarios. Measurements were taken using a guard-heated thermistor probe with and without guard heating. The experimental results showed that the surface temperature was measured as 34.98 �C in the scenario where guard heating was utilized, and 34.79 �C in the scenario where it was not utilized. Therefore, the results experimentally demonstrated that the guard heater allowed the thermistor probe to provide a more accurate measurement of the surface temperature, regardless of the contact method. In addition, a two-dimensional axisymmetric heat conduction analysis was also conducted. The purpose was to quantitatively evaluate the amount of heat that passes through the lead wires of a thermistor while it is measuring the surface temperature of a heated material. The calculation results confirmed that a guard heater successfully minimized heat loss through the lead wires. The minimized heat loss was −0.016 mW, which was one-sixth of the loss measured in the scenario without guard heating.

  86. Investigation on the dissociation flow of methane hydrate cores: Numerical modeling and experimental verification 査読有り

    Chen, L., Yamada, H., Kanda, Y., Okajima, J., Komiya, A., Maruyama, S.

    Chemical Engineering Science 163 31-43 2017年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.ces.2017.01.032  

    ISSN:0009-2509

    eISSN:1873-4405

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    Methane hydrate has become one of the important topics in recent years as there are more and more reports on possible actual production systems. The most challenging problem for stable methane hydrate production from sea beds or under permafrost regions lies in the complex flow and transportation process, which usually occurs inside the unconsolidated porous layers. The current study is focused on laboratory-scale explorations of the basic dissociation behaviors of methane hydrate. A high-pressure experimental system for the methane hydrate synthesis and dissociation process has been established in this study. The experimental system is specially designed to form and store the methane hydrate under high pressure and low temperature conditions. The mixing of sand with the formed methane hydrate makes it possible to control the initial saturation for dissociation in the current study. A numerical simulation model for core-scale dissociation flow has also been set up, and good agreement with the experimental data was found. It is found that the dissociation on a core scale is more heat-transfer controlled. Through comparisons with previous experimental and numerical results, it is known that the operation strategy will significantly affect the dissociation parameter behaviors. The effects of the initial temperature and permeability on the dissociation process are also shown in this study. Future considerations of core-scale models and reservoir-scale production strategies are also discussed in detail. (C) 2017 Elsevier Ltd. All rights reserved.

  87. A novel treatment for metastatic lymph nodes using lymphatic delivery and photothermal therapy 査読有り

    Oladipo, A.O., Oluwafemi, O.S., Songca, S.P., Sukhbaatar, A., Mori, S., Okajima, J., Komiya, A., Maruyama, S., Kodama, T.

    Scientific Reports 7 45459 2017年

    出版者・発行元:Nature Publishing Group

    DOI: 10.1038/srep45459  

    ISSN:2045-2322

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    Systemic delivery of an anti-cancer agent often leads to only a small fraction of the administered dose accumulating in target sites. Delivering anti-cancer agents through the lymphatic network can achieve more efficient drug delivery for the treatment of lymph node metastasis. We show for the first time that polymeric gold nanorods (PAuNRs) can be delivered efficiently from an accessory axillary lymph node to a tumor-containing proper axillary lymph node, enabling effective treatment of lymph node metastasis. In a mouse model of metastasis, lymphatic spread of tumor was inhibited by lymphatic-delivered PAuNRs and near-infrared laser irradiation, with the skin temperature controlled by cooling. Unlike intravenous injection, lymphatic injection delivered PAuNRs at a high concentration within a short period. The results show that lymphatic administration has the potential to deliver anti-cancer agents to metastatic lymph nodes for inhibition of tumor growth and could be developed into a new therapeutic method.

  88. Experimental study of methane hydrate dissociation and gas production behaviors under depressurization 査読有り

    Yamada, H., Chen, L., Lacaille, G., Shoji, E., Okajima, J., Komiya, A., Maruyama, S.

    International Journal of Mechanical Engineering and Robotics Research 6 (2) 140-146 2017年

    DOI: 10.18178/ijmerr.6.2.140-146  

  89. Production strategy for oceanic methane hydrate extraction and power generation with Carbon Capture and Storage (CCS) 査読有り

    Chen, L., Sasaki, H., Watanabe, T., Okajima, J., Komiya, A., Maruyama, S.

    Energy 126 (1) 256-272 2017年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.energy.2017.03.029  

    ISSN:0360-5442

    eISSN:1873-6785

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    Methane hydrate (MH) is one well-known promising energy resources, which has been proved to exist widely around the world and in large amount. Though there are several proposals for efficient utilization system of MH, challenges still remains in the production enhancement. In this study, a new strategic production model is proposed for oceanic MH extraction and offshore power generation with Carbon Capture and Storage (CCS). The batch type design is facilitated with vertical well system and warm-up process, which is executed before and during the continuous gas extraction from MH reservoir. The system includes a methane gas extraction system, power generation system and CO2/H2O injection system. The re-injection of hot water/CO2 sustains the sensitive heat for the dissociation extraction process in a typical strategic production lifecycle. Numerical simulation shows that this design is possible to enhance the long-term gas production. Thermal balance and sensitive heat supply are proved to be of special importance for production rate. The analysis of power generation and CCS system show a general efficiency of 40% for this design. The selection of amine use, the effect of injection conditions and the feasibility of the proposed extraction/generation system are also discussed into detail in this study. (C) 2017 Elsevier Ltd. All rights reserved.

  90. Treatment of tumor in lymph nodes using near-infrared laser light-activated thermosensitive liposome-encapsulated doxorubicin and gold nanorods 査読有り

    Matsuki, D., Adewale, O., Horie, S., Okajima, J., Komiya, A., Oluwafemi, O., Maruyama, S., Mori, S., Kodama, T.

    Journal of Biophotonics 10 (12) 1676-1682 2017年

    出版者・発行元:WILEY-V C H VERLAG GMBH

    DOI: 10.1002/jbio.201600241  

    ISSN:1864-063X

    eISSN:1864-0648

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    Tumor metastasis to lymph nodes is an important contributory factor for cancer-related deaths despite recent developments in cancer therapy. In this study, we demonstrate that tumor in the proper axillary lymph node (PALN) of the mouse can be treated by the application of external laser light to trigger the unloading of doxorubicin (DOX) encapsulated in thermosensitive liposomes (TSLs) administered together with gold nanorods (GNRs). GNRs + DOX-TSLs were injected into a mouse lymph node containing cancer cells (malignant fibrous histiocytoma-like cells) and intranodal DOX release was activated using near-infrared (NIR) laser irradiation. The temperature changes arising from the laser-irradiated GNRs triggered the release of DOX from the TSLs. A greater degree of inhibition of tumor growth was found in the co-therapy group compared to the other groups. The treatment effect was achieved by a combination of chemotherapy and NIR-activated hyperthermia. In vivo bioluminescence imaging and histological analysis confirmed tumor necrosis in response to combined treatment. This work presents a theranostic approach with excellent treatment results that has the potential to be developed into an alternative to surgery for the treatment of breast cancer metastasis. [GRAPHICS] .

  91. Measurement of transient heat transfer in vicinity of gas–liquid interface using high-speed phase-shifting interferometer 査読有り

    Yuki Kanda, Eita Shoji, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    International Communications in Heat and Mass Transfer 89 57-63 2017年

    DOI: 10.1016/j.icheatmasstransfer.2017.09.020  

    ISSN:0735-1933

  92. Estimation and measurement of permeability inside methane hydrate mimicking porous media 査読有り

    Guillaume Lacaille, Hikaru Yamada, Eita Shoji, Lin Chen, Hiroki Gonome, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Journal of Fluid Science and Technology 11 (4) 1-12 2016年12月28日

    DOI: 10.1299/jfst.2016jfst0031  

  93. Influence of Non-gray Participating Media and Wall Surface on Turbulent Natural Convection Heat Transfer in Cubic Cavity 査読有り

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of 20th Australasian Fluid Mechanics Conference 2016年12月6日

  94. Design and Feasibility Analysis of Microscale Bumped Channel With Supersonic Flow for Electronics Cooling 査読有り

    Yuya Takahashi, Lin Chen, Junnosuke Okajima, Yuka Iga, Atsuki Komiya, Wu-Shung Fu, Shigenao Maruyama

    JOURNAL OF MICROELECTROMECHANICAL SYSTEMS 25 (6) 1033-1040 2016年12月

    出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

    DOI: 10.1109/JMEMS.2016.2613942  

    ISSN:1057-7157

    eISSN:1941-0158

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    In this paper, microchannel heat sink cooling device utilizing supersonic gas flow with isentropic expansion has been designed and analyzed. The objective is to study the feasibility of the supersonic microchannel with bumped section design for electronics cooling. Numerical simulations on the designed microchannel flows and heat transfer analysis have been conducted (in conjunction with a supersonic air flow inside a heated fin array) and compared with experimental results in this paper. The performance of the designed microchannel is also compared with traditional Laval nozzles for the feasibility analysis. Under 350 and 330 K inlet temperature conditions, the calculated Nu number is found higher than pure through channel flows. The supersonic expanding flow is successfully generated with lower heat transfer temperatures and a simpler geometric shape. The design of 100-300 mu m is found to have highest heat transfer for integrated microchannel width selection. For electronics cooling tests, the newly designed supersonic channel is found sufficient for a cooling capacity around 1.4 MW/m(2). In addition, the supersonic flow and heat transfer characteristics are also discussed into detail in this paper. [2016-0037]

  95. Investigation of Effect of Skin Structure and Temperature Distribution in Body on Non-invasive Measurement of Effective Thermal Conductivity of Human Skin 査読有り

    Takahiro Okabe, Junnosuke Okajima, Taku Fujimura, Atsuki Komiya, Setsuya Aiba, Shigenao Maruyama

    Proceedings of the Fourth International Forum on Heat Transfer 2016年11月

  96. Visualization of CO2 Absorption Process in the Vicinity of Gas-Liquid Interface 査読有り

    Toru Saito, Atsuki Komiya, Junnosuke Okajima, Shigenao Maruyama

    Proceedings of the Fourth International Forum on Heat Transfer 2016年11月

  97. Interferometric measurement and numerical comparisons of supersonic heat transfer flows in microchannel 査読有り

    Yuya Takahashi, Lin Chen, Junnosuke Okajima, Yuka Iga, Atsuki Komiya, Shigenao Maruyama

    APPLIED THERMAL ENGINEERING 109 582-590 2016年10月

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.applthermaleng.2016.08.108  

    ISSN:1359-4311

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    With the fast development of electronic systems and the ever-increasing demand of thermally "smart" design in space and aeronautic engineering, the heat transfer innovations and high heat flux challenges have become a hot topic for decades. This study is aimed at the effective cooling heat transfer design by super-/sub-sonic air flow in microscale channels for high heat flux devices. The design is based on the low temperature flows with supersonic expansion in microscale, which yields a compact and simple design. By careful microelectromechanical process, microscale straight and bumped channels (with simple arc curve) are fabricated and experimentally tested in this study. The microscale flow field and density distributions under new designs are visualized quantitatively by an advanced phase-shifting interferometer system, which results are then compared carefully with numerical simulations. In this study, large differences between the two designs in density distribution and temperature changes (around 50 K) are found. The high heat flux potential for supersonic microchannel flows is realized and discussion into detail. It is confirmed that the bump design contributes significantly to the heat transfer enhancement, which shows potential for future application in novel system designs. (C) 2016 Elsevier Ltd. All rights reserved.

  98. Visualization of Transient Mass Transfer During Methane Hydrate Dissociation Using High-Speed Phase-Shifting Interferometer, 査読有り

    Y. Kanda, E. Shoji, J. Okajima, A. Komiya, L. Chen, H. Yamada, S. Maruyama

    Proceedings of The 27th International Symposium on Transport Phenomena 2016年9月22日

  99. Experimental Evaluation of Heat and Mass Transfer in a Mimicked Methane Hydrate Reservoir 査読有り

    Guillaume Lacaille, Hikaru Yamada, Hiroki Gonome, Eita Shoji, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the First Pacific Rim Thermal Engineering Conference 2016年3月

  100. Transition from the incoherent to the coherent regime for propagative-wave based thermal radiation 査読有り

    Y. Tsurimaki, P. O. Chapuis, J. Okajima, A. Komiya, S. Maruyama, R. Vaillon

    Journal of Physics: Conference Series 676 (1) 1-3 2016年1月26日

    出版者・発行元:Institute of Physics Publishing

    DOI: 10.1088/1742-6596/676/1/012023  

    ISSN:1742-6596 1742-6588

    詳細を見る 詳細を閉じる

    The transition from the incoherent to the coherent regime for thermal radiation between bodies trough a transparent medium is discussed. The canonical case of two parallel semi-infinite planar media is used as a basis to provide an insight into the physics and quantities ruling the distance at which coherent effects have an impact on the propagative component of the net heat flux exchanged. A practical criterion is proposed to define the distance below which radiation intensity framework should not be used, but instead fluctuational electrodynamics.

  101. Study of methane hydrate as a future energy resource: low emission extraction and power generation 査読有り

    L. Chen, H. Yamada, Y. Kanda, H. Sasaki, J. Okajima, Y. Iga, A. Komiya, S. Maruyama

    2016 INTERNATIONAL CONFERENCE ON NEW ENERGY AND FUTURE ENERGY SYSTEM (NEFES 2016) 40 012074 2016年

    出版者・発行元:IOP PUBLISHING LTD

    DOI: 10.1088/1755-1315/40/1/012074  

    ISSN:1755-1307

    詳細を見る 詳細を閉じる

    With the fast increase of world energy consumption in recent years, new and sustainable energy sources are becoming more and more important. Methane Hydrate is one promising candidate for the future energy supply of humankind, due to its vast existence in permafrost regions and near-coast seabed. This study is focused on the effective low emission utilization of methane hydrate from deep seabed. The Nankai Trough of Japan is taken as the target region in this study for methane hydrate extraction and utilization system design. Low emission system and power generation system with CCS (Carbon Capture and Sequestration) processes are proposed and analyzed for production rate and electricity generation efficiency problem study. It is found that the gas production price can reach the current domestic natural gas supply price level if the production rate can be improved. The optimized system is estimated to have power efficiency about 35%. In addition, current development and analysis from micro-to-macro scale methane hydrate production and dissociation dynamics are also discussed into detail in this study.

  102. Numerical simulation of stability behaviors and heat transfer characteristics for near-critical fluid microchannel flows 査読有り

    Chen, L., Zhang, X.-R., Okajima, J., Komiya, A., Maruyama, S.

    Energy Conversion and Management 110 407-418 2016年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.enconman.2015.12.031  

    ISSN:0196-8904

    eISSN:1879-2227

    詳細を見る 詳細を閉じる

    This paper deals with the CO2 near-critical convective flow inside channels of micro-scale. Under near critical conditions, the CO2 fluid is very much expandable/compressible, the density and thermal conductivity change to be near one order of magnitude lower when temperature goes near the critical point. At the same time the Prandtl number and specific heat also form high peaks. In microchannels the effect of natural convection becomes much smaller and the highly thermal expansive fluid with very small thermal diffusivity will act like a periodic thermal plume structure evolution mode. The current study, transient stability and heat transfer characteristics of near-critical microchannel flow are analyzed by solving conservative equations of Mass, Momentum and Energy together with non-Boussinesq incorporation of thermal physical properties. The numerical study is conducted under the ranges of epsilon(T) = 0.00023 - 0.06533 and epsilon(P) = 0.01626 - 0.21951 (for critical distance parameters) with boundary heat flux (from several hundreds to 50,000 W/m(2)). It is found that in microchannels vortex flow is generated by applied boundary heat flux. The thin hot boundary perturbation and thermal-mechanical process of near-critical fluids are major factors. The local span-wise and horizontal parameter changes are also analyzed for the unique near-critical fluid flow. The heat transfer characteristics, especially horizontal acceleration and expanding features are also discussed in this study. (C) 2015 Elsevier Ltd. All rights reserved.

  103. Large eddy simulation of turbulent natural convection between symmetrically heated vertical parallel plates for water 査読有り

    Kogawa, T., Okajima, J., Komiya, A., Armfield, S., Maruyama, S.

    International Journal of Heat and Mass Transfer 101 870-877 2016年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.ijheatmasstransfer.2016.04.083  

    ISSN:0017-9310

    eISSN:1879-2189

    詳細を見る 詳細を閉じる

    The boundary layer interaction effect of the turbulent natural convection in the gap between symmetrically heated vertical parallel plates was evaluated using a numerical simulation in the present study. A large eddy simulation was conducted, and a Vreman model was used as a dynamic subgrid-scale model. The numerical simulation was validated thorough a comparison with the experimental result for the turbulent natural convection adjacent to a single vertical heated plate. The boundary interaction effect was investigated by varying the gap between the parallel plates. The results showed that the flow for vertical parallel plates had a lower heat transfer rate than a vertical plate flow. The boundary layers and vortex structure were evaluated. The heat transfer was reduced as a result of a reduced velocity gradient in the outer region of the velocity boundary layer. The averaged heat transfer was similar to that of the laminar flow. (C) 2016 Elsevier Ltd. All rights reserved.

  104. Numerical analysis of core-scale methane hydrate dissociation dynamics and multiphase flow in porous media 査読有り

    Chen, L., Yamada, H., Kanda, Y., Lacaille, G., Shoji, E., Okajima, J., Komiya, A., Maruyama, S.

    Chemical Engineering Science 153 221-235 2016年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.ces.2016.07.035  

    ISSN:0009-2509

    eISSN:1873-4405

    詳細を見る 詳細を閉じる

    Methane hydrate is one of the most promising future energy resources for humankind. In recent years, due to its vast existence in permafrost regions and deep ocean beds, increasing attention has been paid to the extraction, transportation and utilization of methane hydrate. The current study proposed core-scale numerical investigation models for the complex multiphase dissociation flows of methane hydrate inside porous media, which is a continuation and an extension of previous numerical investigations. The current numerical model focuses on the depressurization process and thermal boundary effects and discusses the parametric effects of the core-scale internal flows and controlling factors of the dissociation boundaries. The new findings with respect to the dissociation front movement and water-ice equilibrium effects during the dissociation process are also analyzed in this study. Ice formation and boundary heat conduction limitations are found to be critical for the smooth production of methane gas. Based on these results, trade off and production strategies for depressurization methods and thermal stimulation methods are also discussed in detail. It is hoped that this study will be useful for related core-scale analysis and possible engineering system designs. (C) 2016 Elsevier Ltd. All rights reserved.

  105. Study of methane hydrate as a future energy resource: low emission extraction and power generation 査読有り

    L. Chen, H. Yamada, Y. Kanda, H. Sasaki, J. Okajima, Y. Iga, A. Komiya, S. Maruyama

    2016 INTERNATIONAL CONFERENCE ON NEW ENERGY AND FUTURE ENERGY SYSTEM (NEFES 2016) 40 2016年

    出版者・発行元:IOP PUBLISHING LTD

    DOI: 10.1088/1755-1315/40/1/012074  

    ISSN:1755-1307

    詳細を見る 詳細を閉じる

    With the fast increase of world energy consumption in recent years, new and sustainable energy sources are becoming more and more important. Methane Hydrate is one promising candidate for the future energy supply of humankind, due to its vast existence in permafrost regions and near-coast seabed. This study is focused on the effective low emission utilization of methane hydrate from deep seabed. The Nankai Trough of Japan is taken as the target region in this study for methane hydrate extraction and utilization system design. Low emission system and power generation system with CCS (Carbon Capture and Sequestration) processes are proposed and analyzed for production rate and electricity generation efficiency problem study. It is found that the gas production price can reach the current domestic natural gas supply price level if the production rate can be improved. The optimized system is estimated to have power efficiency about 35%. In addition, current development and analysis from micro-to-macro scale methane hydrate production and dissociation dynamics are also discussed into detail in this study.

  106. Interferometric measurement and numerical comparisons of supersonic heat transfer flows in microchannel 査読有り

    Takahashi, Y., Chen, L., Okajima, J., Iga, Y., Komiya, A., Maruyama, S.

    Applied Thermal Engineering 109 582-590 2016年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.applthermaleng.2016.08.108  

    ISSN:1359-4311

    詳細を見る 詳細を閉じる

    With the fast development of electronic systems and the ever-increasing demand of thermally "smart" design in space and aeronautic engineering, the heat transfer innovations and high heat flux challenges have become a hot topic for decades. This study is aimed at the effective cooling heat transfer design by super-/sub-sonic air flow in microscale channels for high heat flux devices. The design is based on the low temperature flows with supersonic expansion in microscale, which yields a compact and simple design. By careful microelectromechanical process, microscale straight and bumped channels (with simple arc curve) are fabricated and experimentally tested in this study. The microscale flow field and density distributions under new designs are visualized quantitatively by an advanced phase-shifting interferometer system, which results are then compared carefully with numerical simulations. In this study, large differences between the two designs in density distribution and temperature changes (around 50 K) are found. The high heat flux potential for supersonic microchannel flows is realized and discussion into detail. It is confirmed that the bump design contributes significantly to the heat transfer enhancement, which shows potential for future application in novel system designs. (C) 2016 Elsevier Ltd. All rights reserved.

  107. Design and Feasibility Analysis of Microscale Bumped Channel with Supersonic Flow for Electronics Cooling 査読有り

    Takahashi, Y., Chen, L., Okajima, J., Iga, Y., Komiya, A., Fu, W.-S., Maruyama, S.

    Journal of Microelectromechanical Systems 25 (6) 1033-1040 2016年

    出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

    DOI: 10.1109/JMEMS.2016.2613942  

    ISSN:1057-7157

    eISSN:1941-0158

    詳細を見る 詳細を閉じる

    In this paper, microchannel heat sink cooling device utilizing supersonic gas flow with isentropic expansion has been designed and analyzed. The objective is to study the feasibility of the supersonic microchannel with bumped section design for electronics cooling. Numerical simulations on the designed microchannel flows and heat transfer analysis have been conducted (in conjunction with a supersonic air flow inside a heated fin array) and compared with experimental results in this paper. The performance of the designed microchannel is also compared with traditional Laval nozzles for the feasibility analysis. Under 350 and 330 K inlet temperature conditions, the calculated Nu number is found higher than pure through channel flows. The supersonic expanding flow is successfully generated with lower heat transfer temperatures and a simpler geometric shape. The design of 100-300 mu m is found to have highest heat transfer for integrated microchannel width selection. For electronics cooling tests, the newly designed supersonic channel is found sufficient for a cooling capacity around 1.4 MW/m(2). In addition, the supersonic flow and heat transfer characteristics are also discussed into detail in this paper. [2016-0037]

  108. Evaluation of the boundary layer of the turbulent natural convection in square cavity with radiation effect 査読有り

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of 9th Australasian Natural Convection Workshop(9ANCW) 35-36 2015年12月14日

  109. Evaluation of power generation system utilizing ocean methane hydrate and chemical carbon capture and storage system 査読有り

    Hiroki GONOME, Hirotoshi SASAKI, Junnosuke OKAJIMA, Atsuki KOMIYA, Shigenao MARUYAMA

    Proceedings of the International Conference on Power Engineering-15 2015年12月3日

    DOI: 10.1299/jsmeicope.2015.12._ICOPE-15-_6  

  110. Development of guarded hot plate apparatus utilizing Peltier module for precise thermal conductivity measurement of insulation materials 査読有り

    Tatsuya Kobari, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    International Journal of Heat and Mass Transfer 91 1157-1166 2015年12月

    出版者・発行元:Elsevier BV

    DOI: 10.1016/j.ijheatmasstransfer.2015.08.044  

    ISSN:0017-9310

  111. Evaluation of radiation effect to the heat and fluid flow characteristics in the turbulent natural convection of square 査読有り

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Steven Armfield, Shigenao Maruyama

    Papers of the 26th International Symposium on Transport Phenomena 2015年9月30日

  112. Simultaneous measurement of concentration and flow fields in CO2 absorption process 査読有り

    Toru SAITO, Atsuki KOMIYA, Junnosuke OKAJIMA, Shigenao MARUYAMA

    Papers of the 26th International Symposium on Transport Phenomena 2015年9月29日

  113. Performance Evaluation About Low CO2 Emission Power Generation System Utilizing Ocean Methane Hydrate 査読有り

    Hiroki Gonome, Hirotoshi Sasaki, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of ASME-ATI-UIT 2015 Conference on Thermal Energy Systems: Production, Storage, Utilization and the Environment 2015年5月

  114. 水中正ストリーマの進展開始電圧に及ぼす放電パラメータの影響 査読有り

    藤田英理, 金澤誠司, 大谷清伸, 小宮敦樹, 金子俊郎, 佐藤岳彦

    静電気学会誌 39 (1) 21-26 2015年1月31日

    出版者・発行元:静電気学会

    ISSN:0386-2550

  115. Transition from multiplicity to singularity of steady natural convection in a tilted cubical enclosure 査読有り

    Torres, J.F., Henry, D., Komiya, A., Maruyama, S.

    Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 92 (2) 2015年

    出版者・発行元:AMER PHYSICAL SOC

    DOI: 10.1103/PhysRevE.92.023031  

    ISSN:1539-3755

    eISSN:1550-2376

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    The transition from the complex Rayleigh-Benard convection to the simple heated-from-the-sides configuration in a cubical cavity filled with a Newtonian fluid is numerically studied. The cavity is tilted by an angle. around its lower horizontal edge and is heated and cooled from two opposite tilted sides. We first analyze the effect of a marginal inclination angle on quasi-Rayleigh-Benard convection (theta approximate to 0 degrees), which is a realistic physical approximation to the ideal Rayleigh-Benard convection. We then yield the critical angles where multiple solutions that were initially found for theta approximate to 0 degrees. disappear, eventually resulting in the single steady roll solution found in the heated-from-the-sides configuration (theta = 90 degrees). We confirm the existence of critical angles during the transition. theta : 0 degrees -&gt; 90 degrees, and we demonstrate that such angles are a consequence of either singularities or collisions of bifurcation points in the Rayleigh-number-theta parameter space. We finally derive the most important critical angles corresponding to any Newtonian fluid of Prandtl number greater than that of air.

  116. Quantitative visualization of boundary layers by developing quasi-common-path phase-shifting interferometer 査読有り

    Shoji, E., Nakaoku, R., Komiya, A., Okajima, J., Maruyama, S.

    Experimental Thermal and Fluid Science 60 231-240 2015年

    出版者・発行元:ELSEVIER SCIENCE INC

    DOI: 10.1016/j.expthermflusci.2014.08.016  

    ISSN:0894-1777

    eISSN:1879-2286

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    The objective of this study is to achieve accurate and quantitative visualization of the boundary layer using a novel optical system that offers a large visualization area, fewer disturbance effects, integration with a wind tunnel and high phase, spatial and temporal resolution. A novel optical configuration was proposed to realize these features. In addition, high phase and spatial resolution could be realized by introducing a phase-shifting image processing technique. Finally, a novel prism was specially designed to implement the phase-shifting technique. In this study, the proposed system was evaluated by using it to quantitatively visualize boundary layers around a circular cylinder and over a flat plate. The effect of a tripwire on the flow was visualized by an interferogram. In the experiments on flow over a flat plate, the temperature distributions in the thermal boundary layer were measured accurately, and the velocity distributions were estimated from the measured temperature distributions. The experimental data were compared with a semi-analytical solution. Good agreement was obtained, and the relative error was within 5.0% in the temperature measurement. (C) 2014 Elsevier Inc. All rights reserved.

  117. High-speed phase-shifting interferometry using triangular prism for time-resolved temperature measurement 査読有り

    Shoji, E., Komiya, A., Okajima, J., Kawamura, H., Maruyama, S.

    Applied Optics 54 (20) 6297-6304 2015年

    出版者・発行元:OPTICAL SOC AMER

    DOI: 10.1364/AO.54.006297  

    ISSN:1559-128X

    eISSN:2155-3165

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    This study proposes a high-speed phase-shifting interferometer with an original optical prism. This phase-shifting interferometer consists of a polarizing Mach-Zehnder interferometer, an original optical prism, a high-speed camera, and an image-processing unit for a three-step phase-shifting technique. The key aspect of the application of the phase-shifting technique to high-speed experiments is an original prism, which is designed and developed specifically for a high-speed phase-shifting technique. The arbaa prism splits an incident beam into four output beams with different information. The interferometer was applied for quantitative visualization of transient heat transfer. In order to test the optical system for measuring high-speed phenomena, the temperature during heat conduction was measured around a heated thin tungsten wire (diameter of 5 mu m) in water. The visualization area is approximately 90 mu m x 210 mu m, and the spatial resolution is 3.5 mu m at 300,000 fps of the maximum temporal resolution with a high-speed camera. The temperature fields around the heated wire were determined by converting phase-shifted data using the inverse Abel transform. Finally, the measured temperature distribution was compared with numerical calculations to validate the proposed system; a good agreement was obtained. (C) 2015 Optical Society of America

  118. Photothermal therapy of tumors in lymph nodes using gold nanorods and near-infrared laser light with controlled surface cooling 査読有り

    Sugiura, T., Matsuki, D., Okajima, J., Komiya, A., Mori, S., Maruyama, S., Kodama, T.

    Nano Research 8 (12) 3842-3852 2015年

    出版者・発行元:TSINGHUA UNIV PRESS

    DOI: 10.1007/s12274-015-0884-x  

    ISSN:1998-0124

    eISSN:1998-0000

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    Photothermal therapy (PTT) using near-infrared (NIR) laser light and gold nanorods (GNRs) shows promise as a novel cancer treatment modality. However, the laser intensity required to destroy tumor cells located beneath the skin is greater than the threshold intensity that causes skin damage; thus, irradiation with laser light damages the skin as well as the tumor. Here, we show that a temperature control system allows metastatic lymph nodes (LNs) to be treated by PTT using NIR laser light and GNRs, without skin damage. A mouse model of LN metastasis was developed by injection of tumor cells, and the tumor-bearing proper axillary LN was treated with NIR laser light after injection of GNRs. The skin temperature was maintained at 45 A degrees C during irradiation by using a temperature control system. Bioluminescence imaging revealed that tumor progression was less in LNs exposed to NIR laser light and GNRs than in LNs exposed to NIR laser light alone or controls (no irradiation or GNRs). Furthermore, the skin and LN capsule were macroscopically intact on day 9 after irradiation with NIR laser light, whereas tumor cells within the LN showed apoptosis. A numerical analysis demonstrated that the high-temperature zone and the LN region showing damage were localized to an area up to 3 mm in depth. The proposed novel PTT technique, using NIR laser light and GNRs with controlled surface cooling, could be applied clinically to treat metastatic LNs located within or outside the area accessible for surgical dissection.

  119. MEASUREMENT OF DENSITY FIELD OF SUPERSONIC FLOW INSIDE A MICRO-CHANNEL BY PHASE SHIFTING INTERFEROMETER 査読有り

    Yuya Takahashi, Junnosuke Okajima, Yuka Iga, Atsuki Komiya, Shigenao Maruyama

    The 25th International Symposium on Transport Phenomena 103-103 2014年11月6日

  120. NUMERICAL INVESTIGATION ON THERMAL AND HYDRODYNAMICAL BEHAVIOR OF EXPANDING SINGLE BUBBLE IN MICROCHANNEL 査読有り

    Junnosuke Okajima, Yuta Aizawa, Ken Hou, Paul Zehner, Atsuki Komiya, Shigenao Maruyama

    The 25th International Symposium on Transport Phenomena 110-110 2014年11月6日

  121. 拡散近似を用いた高温多孔質断熱材におけるふく射伝熱評価 査読有り

    小針達也, 岡島淳之介, 小宮敦樹, 円山重直

    熱物性 28 (4) 179-184 2014年11月

    DOI: 10.2963/jjtp.28.179  

  122. Thermal radiation between two plates: regime map and analytical expressions for the net radiative heat flux from far to near field 査読有り

    Jeff Mayo, Yoichiro Tsurimaki, Pierre-Olivier Chapuis, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    121-123 2014年10月

  123. ESTIMATION OF BLOOD PERFUSION RATE AND ITS TEMPERATURE DEPENDENCY IN HUMAN ABDOMINAL AREA UNDER HEATING CONDITION 査読有り

    J. Okajima, T. Okabe, T. Sugiura, A. Komiya, T. Seki, S. Maruyama

    15th International Heat Transfer Conference 2014年8月

  124. REDUCING THERMAL RADIATION BETWEEN PARALLEL PLATES IN THE FAR-TO-NEAR FIELD TRANSITION REGIME 査読有り

    Yoichiro Tsurimaki, Pierre-Olivier Chapuis, Rodolphe Vaillon, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    15th International Heat Transfer Conference 2014年8月

  125. Application of Traditional Medical Ideas to Geriatric Syndrome, Advances in Geriatrics 査読有り

    Takashi Seki, Shin Takayama, Masashi Watanabe, Noriko Tsuruoka, Tadao Matsunaga, Yoichi Haga, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama, Kenichi Meguro

    Advances in Geriatrics 2014 2014年7月

  126. Quantitative and High-speed Measurement of Temperature Field by Phase-shifting Interferometer 査読有り

    Eita SHOJI, Junnosuke OKAJIMA, Atsuki KOMIYA, Shuichi KOMIYA, Hiroshi KAWAMURA, Shigenao MARUYAMA

    The 16th International Symposium on Flow Visualization (ISFV16) ISFV16-1254 2014年6月25日

  127. 永久塩泉を用いた海洋深層水汲み上げによる沖ノ鳥島海洋緑化に向けた湧昇パイプ展開方法の提案 査読有り

    古川琢磨, 矢吹崇, 知崎正純, 守谷修一, 岡島淳之介, 小宮敦樹, 竹原洋一郎, 石川陽一, 塩原泰, 市川正和, 円山重直

    土木学会論文集 B3 (70) 1-12 2014年6月20日

    出版者・発行元:Japan Society of Civil Engineers

    DOI: 10.2208/jscejoe.70.1  

    ISSN:2185-4688

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    沖ノ鳥島の漁場開発のため本提案では永久塩泉を用いた,湧昇パイプによる海洋深層水汲み上げ手法を検討している.海洋でパイプを係留する時,海流によるパイプの傾きを考慮しなければならない.本研究では沖ノ鳥島周辺海域での湧昇パイプ係留に向け,コンテナ投下法を用いた流線形湧昇パイプ展開方法を提案し,流線形湧昇パイプの展開条件の設計とコンテナ投下法を用いたパイプ展開方法の有用性評価を行った.流線形湧昇パイプの展開条件を設計するため,水槽での抗力試験で測定した流線形湧昇パイプの抗力係数を使用し海流によるパイプ挙動のモデル化を行い,流線形パイプに必要なブイの浮力の算出を行った.またコンテナ投下法の有用性評価を行うため長さ25mの流線形湧昇パイプの展開実験を行い,パイプ展開の観察とコンテナ落下運動の解析を行った.

  128. Radiative heat transfer between two semi-infinte parallel plates at the far-to-near field transition regime 査読有り

    Yoichiro Tsurimaki, Pierre-Olivier Chapuis, Rodolphe Vaillon, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Second International Workshop on Nano-Micro Thermal Radiation: Energy, Manufacturing, Materials and Sensing (NanoRad2014) 44-45 2014年6月9日

  129. New Approach to Optimizing Pigmented Coatings for Ultraviolet Barrier and Blue Light Protection 査読有り

    Hiroki Gonome, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Second International Workshop on Nano-Micro Thermal Radiation: Energy, Manufacturing, Materials and Sensing (NanoRad2014) 6-7 2014年6月8日

  130. Role of continuous discharge current for secondary streamer in water 査読有り

    Hidemasa Fujita, Seiji Kanazawa, Kiyonobu Ohtani, Atsuki Komiya, Toshiro Kaneko, Takehiko Sato

    10 (1) 24-19 2014年6月

  131. Evaluation of characteristics of Phase Change Heat Transfer in Ultrafine Cryoprobe 査読有り

    Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Journal of Flow Control, Measurement & Visualization 2 (2) 55-65 2014年4月

  132. Preliminary Experiment of Supersonic Micro-channel Gas Flow Visualization by using Interferometer 査読有り

    TAKAHASHI Yuya, OKAJIMA Junnosuke, IGA Yuka, KOMIYA Atsuki, MARUYAMA Shigenao

    Journal of Fluid Science and Technology, Vol. 9, No. 5 (2014), No. JFST0069. 9 (5) JFST0069-JFST0069 2014年

    出版者・発行元:The Japan Society of Mechanical Engineers

    DOI: 10.1299/jfst.2014jfst0069  

    ISSN:1880-5558

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    In this study, a cooling device using supersonic flow inside a micro-channel has been evaluated. To confirm the density measurement and temperature estimation of the supersonic air flow inside a micro-channel, a preliminary experiment using an interferometer was conducted. A single micro-channel was fabricated in a small Si plate, which was made using Micro-Electro-Mechanical System (MEMS) technology. The channel size was approximately 200 μm in width, 500 μm in depth, and 6000 μm in length. The Deep Reactive-Ion-Etching (Deep-RIE) method was used for fabricating of the channel. A fabricated Si plate was sandwiched between glass plates. The density field of the supersonic/subsonic air flow near inlet and outlet were recorded as phase-shifted data using a phase-shifting interferometer. The pressure at the inlet, outlet, and inside the channel were set to 0.7 and 0.1 MPaA, respectively. The density field of the micro-channel air flow was evaluated despite the fringe number being less than one. This experimental result was compared with numerical simulation. From the comparison, the measured density field exhibited a good agreement with the numerical results, and the temperature field could be estimated. It was confirmed that this method was valid for the density measurement and the sophisticated visualization of the supersonic air flow inside a micro-channel.

  133. Controlling the radiative properties of cool black-color coatings pigmented with CuO submicron particles 査読有り

    Gonome, H., Baneshi, M., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Quantitative Spectroscopy and Radiative Transfer 132 90-98 2014年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2013.02.027  

    ISSN:0022-4073

    eISSN:1879-1352

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    The objective of this study was to design a pigmented coating with dark appearance that maintains a low temperature while exposed to sunlight. The radiative properties of a black-color coating pigmented with copper oxide (CuO) submicron particles are described. In the present work, the spectral behavior of the CuO-pigmented coating was calculated. The radiative properties of CuO particles were evaluated, and the radiative transfer in the pigmented coating was modeled using the radiation element method by ray emission model (REM2). The coating is made using optimized particles. The reflectivity is measured by spectroscopy and an integrating sphere in the visible (VIS) and near infrared (NIR) regions. By using CuO particles controlled in size, we were able to design a black-color coating with high reflectance in the NIR region. The coating substrate also plays an important role in controlling the reflectance. The NIR reflectance of the coating on a standard white substrate with appropriate coating thickness and volume fraction was much higher than that on a standard black substrate. From the comparison between the experimental and calculated results, we know that more accurate particle size control enables us to achieve better performance. The use of appropriate particles with optimum size, coating thickness and volume fraction on a suitable substrate enables cool and black-color coating against solar irradiation. (C) 2013 Elsevier Ltd. All rights reserved.

  134. Experimental evaluation of optimization method for developing ultraviolet barrier coatings 査読有り

    Gonome, H., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Quantitative Spectroscopy and Radiative Transfer 133 454-463 2014年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2013.09.007  

    ISSN:0022-4073

    eISSN:1879-1352

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    Ultraviolet (UV) barrier coatings can be used to protect many industrial products from UV attack. This study introduces a method of optimizing UV barrier coatings using pigment particles. The radiative properties of the pigment particles were evaluated theoretically, and the optimum particle size was decided from the absorption efficiency and the back-scattering efficiency. UV barrier coatings were prepared with zinc oxide (ZnO) and titanium dioxide (TiO2). The transmittance of the UV barrier coating was calculated theoretically. The radiative transfer in the UV barrier coating was modeled using the radiation element method by ray emission model (REM2). In order to validate the calculated results, the transmittances of these coatings were measured by a spectrophotometer. A UV barrier coating with a low UV transmittance and high VIS transmittance could be achieved. The calculated transmittance showed a similar spectral tendency with the measured one. The use of appropriate particles with optimum size, coating thickness and volume fraction will result in effective UV barrier coatings. UV barrier coatings can be achieved by the application of optical engineering. (C) 2013 Elsevier Ltd. All rights reserved.

  135. Fast propagation of an underwater secondary streamer by the appearance of a continuous component in the discharge current 査読有り

    Fujita, H., Kanazawa, S., Ohtani, K., Komiya, A., Kaneko, T., Sato, T.

    EPL 105 (1) 2014年

    出版者・発行元:EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY

    DOI: 10.1209/0295-5075/105/15003  

    ISSN:0295-5075

    eISSN:1286-4854

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    An underwater secondary streamer for a single-shot pulsed positive voltage was found to propagate with an average velocity of 18 km/s during the appearance of a continuous component on the discharge current waveform. The continuous component was the first discharge current with a direct-current-like component detected after a displacement current. However, the propagation velocity decreased to less than 2 km/s during the appearance of pulsed currents, which followed the continuous component. These results were analyzed by highly spatiotemporal visualization synchronized with the discharge current. Copyright (C) EPLA, 2014

  136. Control of thermal barrier performance by optimized nanoparticle size and experimental evaluation using a solar simulator 査読有り

    Gonome, H., Baneshi, M., Okajima, J., Komiya, A., Yamada, N., Maruyama, S.

    Journal of Quantitative Spectroscopy and Radiative Transfer 149 81-89 2014年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2014.07.025  

    ISSN:0022-4073

    eISSN:1879-1352

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    An experimental investigation to evaluate the radiative properties of a selectively transparent thin coating on a substrate of a different material has been performed in order to evaluate its thermal behavior for applications where a low temperature at the surface exposed to the sun is desired. Copper (II) oxide (CuO) micro-particles have been used to create a pigmented coating on a paper substrate. The particle volume fraction and size have been optimized by the theoretical methodology. The spectral reflectance was measured using spectroscopy in the visible (VIS) and near-infrared (NIR) regions. The spectral emissivity was evaluated from the reflectance in IR region. The temperatures of the designed coatings and typical black paints are measured in a solar simulator. The temperature measurement was simulated by numerical analysis. The temperature of CuO coating on standard white paper was 10 degrees C lower than the ones of typical black paint while keeping the desired dark tone. (C) 2014 Elsevier Ltd. All rights reserved.

  137. Bifurcation analysis of steady natural convection in a tilted cubical cavity with adiabatic sidewalls 査読有り

    Torres, J., Henry, D., Komiya, A., Maruyama, S.

    Journal of Fluid Mechanics 756 650-688 2014年

    出版者・発行元:CAMBRIDGE UNIV PRESS

    DOI: 10.1017/jfm.2014.448  

    ISSN:0022-1120

    eISSN:1469-7645

    詳細を見る 詳細を閉じる

    Natural convection in an inclined cubical cavity heated from two opposite walls maintained at different temperatures and with adiabatic sidewalls is investigated numerically. The cavity is inclined by an angle theta around a lower horizontal edge and the isothermal wall set at the higher temperature is the lower wall in the horizontal situation (theta = 0 degrees). A continuation method developed from a three-dimensional spectral finite-element code is applied to determine the bifurcation diagrams for steady flow solutions. The numerical technique is used to study the influence of theta on the stability of the flow for moderate Rayleigh numbers in the range Ra &lt;= 150 000, focusing on the Prandtl number Pr = D 5.9. The results show that the inclination breaks the degeneracy of the stable solutions obtained at the first bifurcation point in the horizontal cubic cavity: (i) the transverse stable rolls, whose rotation vector is in the same direction as the inclination vector Theta, start from Ra -&gt; 0 forming a leading branch and becoming more predominant with increasing theta; (ii) a disconnected branch consisting of transverse rolls, whose rotation vector is opposite to Theta, develops from a saddle-node bifurcation, is stabilized at a pitchfork bifurcation, but globally disappears at a critical inclination angle; (iii) the semi-transverse stable rolls, whose rotation axis is perpendicular to Theta at theta -&gt; 0 degrees, develop from another saddle-node bifurcation, but the branch also disappears at a critical angle. We also found the stability thresholds for the stable diagonal-roll and four-roll solutions, which increase with theta until they disappear at other critical angles. Finally, the families of stable solutions are presented in the Ra - theta parameter space by determining the locus of the primary, secondary, saddle-node, and Hopf bifurcation points as a function of Ra and theta.

  138. Highly temporal visualization of generation process of underwater secondary streamer from developed primary streamer 査読有り

    Fujita, H., Kanazawa, S., Ohtani, K., Komiya, A., Kaneko, T., Sato, T.

    IEEE Transactions on Plasma Science 42 (10) 2398-2399 2014年

    出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

    DOI: 10.1109/TPS.2014.2325937  

    ISSN:0093-3813

    eISSN:1939-9375

    詳細を見る 詳細を閉じる

    A series of images of a generation process of an underwater secondary streamer from a developed primary streamer was visualized by an ultrahigh-speed camera with a microscope lens. The secondary streamer with a filamentary structure propagated with an average velocity of 30 km/s from one of the channel tips of the semispherical primary streamer with an average propagation velocity of 1.8 km/s. The synchronized current waveform showed that pulsed currents of about 100 mA were changed into a continuous current of about 300 mA when the secondary streamer started to propagate. This experiment was carried out by the application of a single-shot pulsed positive voltage to a needle-to-wire electrode system with a gap length of 6 mm.

  139. 24-gauge ultrafine cryoprobe with diameter of 550 μm and its cooling performance 査読有り

    Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Cryobiology 69 (3) 411-418 2014年

    出版者・発行元:None

    DOI: 10.1016/j.cryobiol.2014.09.104  

    ISSN:1090-2392 0011-2240

  140. Initiation process and propagation mechanism of positive streamer discharge in water 査読有り

    Fujita, H., Kanazawa, S., Ohtani, K., Komiya, A., Kaneko, T., Sato, T.

    Journal of Applied Physics 116 (21) 2014年

    出版者・発行元:AMER INST PHYSICS

    DOI: 10.1063/1.4902862  

    ISSN:0021-8979

    eISSN:1089-7550

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    The aim of this study was to clarify the initiation process and the propagation mechanism of positive underwater streamers under the application of pulsed voltage with a duration of 10 mu s, focusing on two different theories of electrical discharges in liquids: the bubble theory and the direct ionization theory. The initiation process, which is the time lag from the beginning of voltage application to streamer inception, was found to be related to the bubble theory. In this process, Joule heating resulted in the formation of a bubble cluster at the tip of a needle electrode. Streamer inception was observed from the tip of a protrusion on the surface of this bubble cluster, which acted as a virtual sharp electrode to enhance the local electric field to a level greater than 10 MV/cm. Streak imaging of secondary streamer propagation showed that luminescence preceded gas channel generation, suggesting a mechanism of direct ionization in water. Streak imaging of primary streamer propagation revealed intermittent propagation, synchronized with repetitive pulsed currents. Shadowgraph imaging of streamers synchronized with the light emission signal indicated the possibility of direct ionization in water for primary streamer propagation as well as for secondary streamer propagation. (C) 2014 AIP Publishing LLC.

  141. Highly spatiotemporal visualization of streamer propagations in water 査読有り

    Hidemasa Fujita, Seiji Kanazawa, Kiyonobu Ohtani, Atsuki Komiya, Takehiko Sato

    OS13-02-3 2013年11月

  142. Experimental and numerical evaluation of small-scale cryosurgery using ultrafine cryoprobe 査読有り

    Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Journal of Nanotechnology in Engineering and Medicine 4 (4) 041009-1-041009-5 2013年11月1日

    出版者・発行元:ASME International

    DOI: 10.1115/1.4027988  

    ISSN:1949-2944

    eISSN:1949-2952

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    The objective of this work is to experimentally and numerically evaluate small-scale cryosurgery using an ultrafine cryoprobe. The outer diameter (OD) of the cryoprobe was 550 μm. The cooling performance of the cryoprobe was tested with a freezing experiment using hydrogel at 37 °C. As a result of 1 min of cooling, the surface temperature of the cryoprobe reached −35 °C and the radius of the frozen region was 2 mm. To evaluate the temperature distribution, a numerical simulation was conducted. The temperature distribution in the frozen region and the heat transfer coefficient was discussed.

  143. 逆問題解析を用いた軟質材料及び液体の熱伝導率推定手法 査読有り

    岡部孝裕, 岡島淳之介, 小宮敦樹, 高橋一郎, 円山重直

    日本機械学会論文集B編 79 (806) 2264-2274 2013年10月

    出版者・発行元:None

    DOI: 10.1299/kikaib.79.2264  

    ISSN:0387-5016

    eISSN:1884-8346

  144. Large eddy simulation of the diffusion process of nutrient-rich up-welled seawater 査読有り

    Takuma Kogawa, Shigenao Maruyama, Masud Behnia, Masasazumi Chisaki, Junnosuke Okajima, Atsuki Komiya

    Frontiers in Heat and Mass Transfer 4 (2) 2013年9月20日

    出版者・発行元:Global Digital Central

    DOI: 10.5098/hmt.v4.2.3002  

    ISSN:2151-8629

  145. Measurement of Soret and Fickian diffusion coefficients by orthogonal phase-shifting interferometry and its application to protein aqueous solutions 査読有り

    Juan F. Torres, Atsuki Komiya, Daniel Henry, Shigenao Maruyama

    The Journal of Chemical Physics 139 (7) 074203-074203 2013年8月21日

    出版者・発行元:AIP Publishing

    DOI: 10.1063/1.4817682  

    ISSN:0021-9606

    eISSN:1089-7690

  146. Measurement of boundary layers using phase-shifting quasi common path interferometer 査読有り

    Shigenao Maruyama, Eita Shoji, Junnosuke Okajima, Atsuki Komiya

    37-43 2013年8月

  147. Inverse method for estimating local thermal diffusivity of biomaterials 査読有り

    Takahiro OKABE, Junnosuke OKAJIMA, Atsuki KOMIYA, Yun LUO, Ichiro TAKAHASHI, Shigenao MARUYAMA

    Journal of Thermal Science and Technology 8 (2) 395-406 2013年7月

    出版者・発行元:Japan Society of Mechanical Engineers

    DOI: 10.1299/jtst.8.395  

    eISSN:1880-5566

  148. Thermal performance of black cupric oxide submicron-particulate coatings: exposure temperature measurement 査読有り

    Hiroki Gonome, Mehdi Baneshi, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    RAD-13-SH2 2013年6月

  149. Quantitative visualization of boundary layers using quasi common path phase-shifting interferometer 査読有り

    Eita Shoji, Ryota Nakaoku, Atsuki Komiya, Junnosuke Okajima, Shigenao Maruyama

    166 2013年6月

  150. Quantitative evaluation of protein mass flux in the vicinity of thin plate surface 査読有り

    Atsuki Komiya, Jérôme Chevalier, Sébastien Pruvos, Sébastien Livi

    447 2013年6月

  151. Three-dimensional continuation study of convection in a tilted rectangular enclosure 査読有り

    Torres, J.F., Henry, D., Komiya, A., Maruyama, S., Ben Hadid, H.

    Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 88 (4) 2013年

    出版者・発行元:AMER PHYSICAL SOC

    DOI: 10.1103/PhysRevE.88.043015  

    ISSN:1539-3755

    eISSN:1550-2376

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    A continuation method developed from a three-dimensional spectral finite element code is used to study natural convection in a tilted rectangular cavity. The cavity has its length equal to two times the side of its square cross section and it contains a fluid with a Prandtl number Pr = 1. A detailed bifurcation diagram is first obtained in the case without inclination in order to get the sequence of the different branches of solutions and determine the stable solutions. The focus is then put on the stable solutions in the inclined cavity, when the tilt occurs around its longest axis. The subtle changes induced by the tilt on the convective system are clarified. Three different stable solutions are obtained: the longitudinal roll L-solution (with the same sense of rotation as the inclination angle), which develops smoothly from zero Rayleigh number on the leading branch; the longitudinal roll L+ solution (with a sense of rotation opposite to the inclination angle), which is on a disconnected branch and is stabilized beyond a secondary bifurcation point; the oblique roll O +/- solutions (corresponding to transverse roll solutions perturbed by the longitudinal flow induced by the tilt), which quickly appear beyond saddle-node points on new disconnected branches. The domain of existence of these stable solutions is eventually obtained and described in the Rayleigh number-inclination parameter space. Finally, the Nusselt number is determined as a function of the inclination at a constant Rayleigh number for the different stable solutions. The Nusselt number is maximum at an inclination of 49.55 degrees for the leading longitudinal roll L- solution.

  152. STUDY OF SUPERSONIC MICRO-CHANNEL FOR COOLING ELECTRONIC DEVICES 査読有り

    Yuya Takahashi, Junnosuke Okajima, Yuka Iga, Atsuki Komiya, Wu-Shung Fu, Shigenao Maruyama

    PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS, AND MINICHANNELS, 2013 2013年

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

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    In this study, we focus on a micro-scale cooling device using a supersonic single phase gas flow. The single phase gas cooling system has advantages for cooling electronics device in a micro-scale. Generally, the forced convective heat transfer by single phase gas flow has a lower heat transfer coefficient than other heat transfer mechanisms. However, the heat transfer rate can be largely improved with a low temperature flow that is generated by isentropic expansion in supersonic nozzle. The objective of this study is to conduct a numerical evaluation of the possibility of this cooling system with a supersonic air flow through a heated micro-fin array. In order to calculate the supersonic flow inside the nozzle and evaluate the effect of the nozzle shape on the heat transfer, two types of nozzles are designed. One nozzle is a typical supersonic nozzle called Laval nozzle. The other is named Bump nozzle Which has a simple arc shape at the throat. The channel size of both nozzles are about 200 pm in width and 2743.1 pm in length. In order to estimate the cooling performance, the' numerical simulations were conducted by using ANSYS FLUENT 12.1 With the densitybased Roe-FDS method. The inlet pressure, outlet pressure, and total pressure were set to 290 kPa, 100 kPa, and 367.1 kPa, respectively. The stagnation temperature and wall temperature were assumed 300 K and 350 K, respectively. The values of bulk mean temperature and Nusselt number were estimated. In both nozzles, the calculated bulk mean temperature was about 230 K and the Nusselt number was 7.54, which is the theoretical value of laminar forced convection between the parallel plates. The results showed that the Bump nozzle had almost the same cooling performance as the Laval nozzle in spite of its simple geometry in the each single channel. In addition, the Bump nozzle can have 4 times the number of channels the Laval nozzle configuration can occupy the same area because of its shape. This indicates that cooling performance of a device that includes the Bump nozzle geometry is higher than that of the Laval nozzle.

  153. Spatiotemporal analysis of propagation mechanism of positive primary streamer in water 査読有り

    Fujita, H., Kanazawa, S., Ohtani, K., Komiya, A., Sato, T.

    Journal of Applied Physics 113 (11) 2013年

    出版者・発行元:AMER INST PHYSICS

    DOI: 10.1063/1.4795765  

    ISSN:0021-8979

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    Currently, further clarification of pre-breakdown phenomena in water such as propagation mechanisms of primary and secondary streamers are needed because applications of aqueous plasma to environmental and medical treatments are increasing. In this study, a series of primary streamer propagations in ultrapure water was visualized at 100-Mega frames per second (100 Mfps) in the range of 400 mu m square using an ultra high-speed camera with a microscope lens when a single-shot pulsed positive voltage was applied to a needle electrode placed in a quartz cell. Every observation was synchronized with the waveforms of the applied voltage and the discharge current. The primary streamer, having many filamentary channels, started to propagate semi-spherically with a velocity of about 2 km/s when the pulsed currents occurred. Although most filamentary channels disappeared 400 ns after the beginning of the primary streamer, a few of them continued propagating with almost the same velocity (about 2 km/s) as long as the repetitive pulsed currents flowed. Shock waves were iteratively generated and streamer channels were formed while the repetitive pulsed currents were flowing. Thus, we concluded that the positive primary streamer in water propagates progressively with each repetitive pulsed current. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795765]

  154. Radiative properties of spectral selective coatings pigmented with TiO2 nanoparticles 査読有り

    Gonome, H., Baneshi, M., Komiya, A., Maruyama, S.

    Heat Transfer - Asian Research 42 (4) 2013年

    DOI: 10.1002/htj.20392  

  155. Visualization and Measurement of Laminar Natural Convection in Square Enclosure 査読有り

    Eita Shoji, Shion Kon, Atsuki Komiya, Junnosuke Okajima, Shigenao Maruyama

    Proceedings of the third International Forum on Heat Transfer(IFHT2012) 2012年11月14日

  156. Temperature Distribution Measurement in Natural Convection around Vertical Heated Flat Plate by Using Inverse Abel Transform and Phase-Shifting Interferometer 査読有り

    Eita Shoji, Atsuki Komiya, Junnosuke Okajima, Shigenao Maruyama

    Proceedings of 23rd International Symposium on Transport Phenomena 2012年11月

  157. Experimental Trial to Active Control of Protein Mass Flux in Hindered Diffusion Field 査読有り

    Atsuki Komiya, Jerome Chevalier

    Proceedings of the 23rd International Symposium on Transport Phenomena 2012年11月

  158. 点接触式熱物性測定法を利用した軟質材料及び液体の熱伝導率測定手法 査読有り

    岡部孝裕, 眞下央, 岡島淳之介, 小宮敦樹, 高橋一郎, 円山重直

    熱物性 26 (3) 136-141 2012年8月

    出版者・発行元:JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

    DOI: 10.2963/jjtp.26.136  

    ISSN:0913-946X

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    本報では,点接触式熱物性測定法を軟質材料及び液体へ適用する場合の課題を提起し,この課題に対してポリイミド薄膜を用いた新しい測定手法を提案した.また,ポリイミド薄膜が測定に与える影響を検証するために数値計算を行い,その影響を明らかにした.さらに,水や寒天などの熱伝導率測定を行った結果,再現性は改善されたものの,ポリイミド薄膜の影響によって算出される見かけの熱伝導率と文献値に差異が生じた.しかしながら,各試料の測定結果の間に相関があることから修正式を考慮することで,正確な熱伝導率を算出できる可能性を示した.

  159. Development of Cryosurgical System in Small Region Utilizing Phased Change in a Microchannel 査読有り

    J. Okajima, A. Komiya, S. Maruyama

    Proceeding of the 8th KSME-JSME Thermal and Fluid Engineering Conference 2012年3月21日

  160. Development of various cryoprobes using heat transfer control 査読有り

    Okajima, J., Komiya, A., Takeda, H., Maruyama, S.

    Modern Cryosurgery for Cancer 211-248 2012年

    出版者・発行元:Modern Cryosurgery for Cancer

    DOI: 10.1142/9789814329668_0009  

    詳細を見る 詳細を閉じる

    • Development of three novel cryoprobes using heat transfer control was carried out to improve the cooling technique in cryosurgery. • Peltier cryoprobes were developed to achieve precise temperature control and high cooling power and to aim at controlling a frozen region as thin as possible for accurate skin cryosurgery. The cooling rate and the lowest temperature of the cooling section can be controlled by a PID controller. The minimum controllable frozen depth was calculated and it indicated that the Peltier cryoprobe could control a frozen depth larger than 400 im. Additionally, the results of an animal experiment clarified that the necrosis depended strongly on the lowest temperature only epidermis was necrotized at −30°C, and dermis was also necrotized in some samples at −40°C. • A flexible cryoprobe without vacuum insulation was developed by using a liquid refrigerant and its isenthalpic expansion for the treatment of stomach cancer with the endoscopic instrument. The cooling performance was evaluated experimentally and it was confirmed that the proposed cryoprobe enables one to freeze the agar gel within 12 s. The experiment of repetition of cooling and heating by utilizing the Peltier effect indicated that the flexible cryoprobe could easily perform heat transfer control by adjusting the electric current. An animal experiment was also conducted in order to estimate the availability of the flexible cryoprobe. In that experiment, the skin surface froze within 80 s. It is clear that the repetition of cooling and heating is more effective for destruction of the cells than continuous long time cooling. • An ultrafine cryoprobe 0.55 mm in diameter and cooled by the boiling heat transfer of a refrigerant was developed for treatments of a very small affected area and cryosurgery in a blood vessel with a catheter. The ultrafine cryoprobe cooled by HFC-23 in the liquid phase showed that the surface temperature was −50°C when the cryoprobe was thermally insulated. It is obvious that this cryoprobe has the large heat capacity to achieve cooling in a small region. A freezing experiment with agar at 37°C was conducted. The surface temperature in the frozen region was reached at about −35°C. In 5 min, the radius of the frozen region was approaching 3 mm. The experimental results indicate that the ultrafine cryoprobe has sufficient cooling power to create a frozen region in the living body.

  161. Numerical study of non-gray radiation and natural convection using the full-spectrum k-distribution method 査読有り

    Lari, K., Baneshi, M., Nassab, S.A.G., Komiya, A., Maruyama, S.

    Numerical Heat Transfer; Part A: Applications 61 (1) 61-84 2012年

    出版者・発行元:TAYLOR & FRANCIS INC

    DOI: 10.1080/10407782.2012.638504  

    ISSN:1040-7782

    詳細を見る 詳細を閉じる

    The interaction of non-gray radiation and natural convection in a 2-D cavity is studied numerically. The aim of this work is to analyze the thermal and flow behaviors of real cases with a small temperature difference using the full-spectrum k-distribution method. In addition, the results are obtained for different medium assumptions like pure convection, transparent medium, and gray medium to investigate which assumption is appropriate to be used instead of non-gray calculations. The results show that the gray medium assumption for radiative heat transfer is suitable to be used in cavities with normal air mixture at normal room conditions.

  162. The effects of TiO2 pigmented coatings characteristics on temperature and brightness of a coated black substrate 査読有り

    Baneshi, M., Maruyama, S., Komiya, A.

    Solar Energy 86 (1) 200-207 2012年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.solener.2011.09.019  

    ISSN:0038-092X

    詳細を見る 詳細を閉じる

    The high visible reflectivity of the cool coatings made by typical white pigment particles produces high glare, which is unpleasant to the human eye and possibly distorts the view of coated objects. A new approach to optimizing pigmented coatings considering both thermal and esthetic effects was proposed in previous works. For an accurate thermal analysis, a full spectral evaluation of radiative properties of pigmented coatings from UV to far IR wavelengths is required. We made a full spectral analysis of TiO 2 pigment particles in polyethylene resin as the host medium in the wavelength range of 0.3-36μm. To find the spectral transmittance and reflectance of the pigmented layer, we conducted a radiation analysis using the radiation element method by ray emission model (REM 2). The effects of characteristics of the coating layer, including size and volume concentration of pigment particles and coating thickness on esthetic and thermal behaviors were studied. The results show that by using the proposed optimum particle size, i.e., 0.8μm, it is possible to design a coating with reasonable temperature and moderate brightness. © 2011 Elsevier Ltd.

  163. Uniform thermal conditions on 3-D object: Optimal power estimation of panel heaters in a 3-D radiant enclosure 査読有り

    Chopade, R.P., Mishra, S.C., Mahanta, P., Maruyama, S., Komiya, A.

    International Journal of Thermal Sciences 51 (1) 63-76 2012年

    出版者・発行元:ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

    DOI: 10.1016/j.ijthermalsci.2011.08.007  

    ISSN:1290-0729

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    The present study deals with an estimation of the optimum powers of the panel heaters that produces uniform thermal conditions over a 3-D design object placed inside a 3-D radiant enclosure. Radiation element method by ray emission model (REM(2)) has been used to calculate the radiative information. The objective function has been minimized using the micro-genetic algorithm (MGA). To investigate the effect of the enclosure height on the optimal heater power setting, the problem has been investigated for four different aspect ratios. For the given heat flux or temperature distribution on the design object, the user has the choice to select heaters of varying power ranges, and in the present work, the validity of this formulation has been exemplified by selecting different power ranges of the heaters. The effect of specular reflections from the refractory walls and heater surfaces has also been accounted. For the desired uniform thermal conditions on the 3-D design object, the powers of the panel heaters have been accurately estimated using the REM(2) and the MGA. (C) 2011 Elsevier Masson SAS. All rights reserved.

  164. The effect of particles size distribution on aesthetic and thermal performances of polydisperse TiO2 pigmented coatings: Comparison between numerical and experimental results 査読有り

    Baneshi, M., Gonome, H., Komiya, A., Maruyama, S.

    Journal of Quantitative Spectroscopy and Radiative Transfer 113 (8) 2012年

    DOI: 10.1016/j.jqsrt.2012.02.006  

  165. Development of phase-shifting interferometry for measurement of isothermal diffusion coefficients in binary solutions 査読有り

    Torres, J.F., Komiya, A., Shoji, E., Okajima, J., Maruyama, S.

    Optics and Lasers in Engineering 50 (9) 1287-1296 2012年

    DOI: 10.1016/j.optlaseng.2012.03.006  

  166. Measurement of the molecular mass dependence of the mass diffusion coefficient in protein aqueous solutions 査読有り

    Torres, J.F., Komiya, A., Okajima, J., Shigenao, M.

    Defect and Diffusion Forum 326-328 452-+ 2012年

    出版者・発行元:TRANS TECH PUBLICATIONS LTD

    DOI: 10.4028/www.scientific.net/DDF.326-328.452  

    ISSN:1012-0386

    詳細を見る 詳細を閉じる

    This paper reports the measurement of the binary mass diffusion coefficient for proteins with a wide range of molecular size. The diffusion coefficient is obtained by conducting diffusion experiments in the dilute region. Transient concentration profiles were measured by a phase-shifting interferometer and subsequently compared with a numerical calculation based on Fick's law to determine the diffusion coefficient. Distilled water was used as solvent in free diffusion experiments conducted at T = (25 +/- 1.0)degrees C. The method was validated by measuring the diffusion coefficient of aqueous NaCl, Sucrose, and BSA, which values have been extensively reported in the literature. The values of the diffusion coefficient for seven proteins: aprotinin (6.5 kDa), alpha-lactalbumin (14.2 kDa), lysozyme (14.3 kDa), trypsin inhibitor (20.1 kDa), ovalbumin (44.2 kDa), bovine serum albumin (66.7 kDa), and phosphorylase b (97.2 kDa), were determined in the dilute region of 0-3 mg/ml. The results are compared with the Stokes-Einstein equation. The influence of the molecular structure and pH on the diffusion coefficient is discussed.

  167. The effect of dispersed state to control of radiative properties of coatings pigmented with nanoparticles 査読有り

    Gonome, H., Baneshi, M., Vaillon, R., Okajima, J., Komiya, A., Maruyama, S.

    Journal of Thermal Science and Technology 7 (2) 364-378 2012年

    出版者・発行元:JAPAN SOC MECHANICAL ENGINEERS

    DOI: 10.1299/jtst.7.364  

    ISSN:1880-5566

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    This study describes nanoparticle pigmented coatings used in controlling the radiative properties of surfaces exposed to sunlight. The effect of particle dispersed state to reflectance of the coating is discussed. As the dispersed particles, TiO2 and Fe2O3 are used. From Raman spectral intensity measurements made on the coating, the dispersed state of particles was investigated. The spectral reflectance of the coating was measured by spectroscopy. The reflectivity of the coating is analyzed theoretically. In this calculation, the dispersed state is assumed to be monodispersed and homogeneous. Comparison between experimental and numerical results shows that the difference between the measured and calculated reflectance increases as the volume fraction increases. The maximum absolute error of reflectance is about 10% when the volume fraction is 0.05. In contrast, the maximum absolute error of reflectance is about 3% when the volume fraction is 0.01. The control of dispersed state affects the radiative properties of pigmented coatings.

  168. Proposal for a low CO2 emission power generation system utilizing oceanic methane hydrate 査読有り

    Maruyama, S., Deguchi, K., Chisaki, M., Okajima, J., Komiya, A., Shirakashi, R.

    Energy 47 (1) 340-347 2012年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.energy.2012.09.034  

    ISSN:0360-5442

    詳細を見る 詳細を閉じる

    A power generation system with low carbon dioxide (CO2) emission is proposed. This system simultaneously performs power generation, methane hydrate utilization, and carbon dioxide capture and storage (CCS). In this system, CO2 resulting from the combustion is recovered by compressed seawater. A thermal stimulation method was selected to dissociate the oceanic methane hydrate. CO2-dissolved seawater is heated by the exhausted gas and injected into the hydrate layer to dissociate the methane hydrate. By means of process simulation, a feasibility study of the proposed system was conducted, during which a power generation system with approximately 30% thermal efficiency and above 90% CO2 recovery rate was achieved. Moreover, to quantify the heat loss during the injection of hot seawater into the hydrate layer, we conducted a numerical simulation of the internal pipe flow and determined that the appropriate pipe diameter can be selected in terms of heat and pressure loss through the pipe. In addition, the outlet temperature can be predicted by the thermal conductivity and the thickness of the insulation material. An appropriate insulation material can be selected to obtain the desired outlet temperature. (C)2012 Elsevier Ltd. All rights reserved.

  169. Development of quasi common path phase-shifting interferometer for measurement of natural convection fields 査読有り

    Shoji, E., Komiya, A., Okajima, J., Maruyama, S.

    International Journal of Heat and Mass Transfer 55 (25-26) 7460-7470 2012年

    DOI: 10.1016/j.ijheatmasstransfer.2012.07.039  

    ISSN:0017-9310

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    A quasi common path phase-shifting interferometer for convection measurement was developed in this paper. This interferometer has a large measurement area of approximately 100 mm in diameter to visualize the spatial structure of natural convection. It also has a quasi common path to reduce the effects of air disturbance and vibration. In addition, a phase-shifting technique is introduced to improve the interferometer's phase resolution and spatial resolution. Natural convection fields around a vertical flat plate with Rayleigh numbers from 1.9 × 10 6 to 3.0 × 10 6 were measured and the temperature profiles were estimated by the interferometer. The obtained temperature profiles were compared with the analytical solutions. Moreover, the three-dimensional effect of a thermal boundary layer was investigated. To validate the interferometer's capability, the experimental results were compared with the calculated results in terms of changes in the optical path length of the test beam. It was confirmed that the quasi common path phase-shifting interferometer can measure the optical path length change accurately at high phase and spatial resolutions. © 2012 Elsevier Ltd. All rights reserved.

  170. Analysis of evaporative heat transfer by expansion bubble in a microchannel for high heat flux cooling 査読有り

    Okajima, J., Komiya, A., Maruyama, S.

    Journal of Thermal Science and Technology 7 (4) 740-752 2012年

    出版者・発行元:JAPAN SOC MECHANICAL ENGINEERS

    DOI: 10.1299/jtst.7.740  

    ISSN:1880-5566

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    The objectives of this study were to establish a theoretical model of the phase change heat transfer in a microchannel and to investigate the possibility of cooling under higher heat flux than the critical heat flux for nucleate boiling. A bubble expansion model including transient variation of the liquid film thickness was proposed. The heat transfer coefficient and wall superheat were calculated by proposed model. The validity of this model was evaluated by using cited experimental data. It was confirmed that the bubble length derived by this model was in good agreement with that data. In order to evaluate the heat transfer regime in a microchannel, the minimum wall superheat to initiate nucleate boiling was introduced, and the conditions to achieve perfect evaporative heat transfer in a microchannel under the critical heat flux were derived. The diameter of the microchannel where perfect evaporative heat transfer occurs is called the "boiling limit diameter". The boiling limit diameters of various fluids were calculated. The results clarified the influence of the surface tension on the phase change heat transfer in a microchannel. Furthermore, this result also indicated the possibility of high heat flux cooling with perfect evaporative heat transfer in a microchannel.

  171. Visualization and Measurement of Natural Convection around Vertical Flat Plate by Common Path Phase-Shifting Interferometer 査読有り

    E. Shoji, A. Komiya, J. Okajima, S. Maruyama

    Proceedings of 22nd International Symposium on Transport Phenomena 2011年11月

  172. Theoretical study for high heat flux cooling by using phase change heat transfer in a microchannel 査読有り

    Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    HTFFM-IV-101 2011年9月

  173. Visualization of flow patterns in differently shaped cooling channels of pistons 査読有り

    Tatsuya Kobari, Atsuki Komiya, Shuichi Moriya, Seiji Kosaka, Yashikatsu Nakano, Shigenao

    034 2011年8月23日

  174. Formation and dissociation of oceanic methane hydrate for a low CO2 emission power generation system 査読有り

    Shigenao Maruyama, Koji Deguchi, Atsuki Komiya

    Proceedings of ASME 2011 Power Conference POWER 2011 POWER2011-55308-+ 2011年7月

    出版者・発行元:None

  175. Evaluation of the Concentration Dependency of Mass Diffusion Coefficients in Aqueous Binary Solutions 査読有り

    J.F. Torres, A. Komiya, J. Okajima, S. Maruyama

    Proceedings of 7th International Conference on Diffusion in Solids and Liquids 2011年6月

  176. Numerical study of a transitional natural ventilation flowdriven by a line source plume with varied Reynolds and Prandtl numbers 査読有り

    Hattori, T., Armfield, S.W., Kirkpatrick, M.P., Maruyama, S., Komiya, A.

    Computational Thermal Sciences 3 (6) 511-519 2011年

    DOI: 10.1615/ComputThermalScien.2011003212  

    ISSN:1940-2503 1940-2554

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    The effects of the parameters, Reynolds number, Re, and Prandtl number, Pr, on natural ventilation flow in the transitional regime, with a line heat flux source, are investigated using two-dimensional direct numerical simulations. Results have been obtained for Re and Pr in the ranges, 5.0×10 5 ≤ Re ≤ 1.58×10 6 and 0.7 ≤ Pr ≤ 70. Flows with constant heat flux, q ~ Re 2/Pr, at Re 2/Pr = 3.57×10 10 and 3.57×10 11 are studied in detail. The results obtained in this study provide a good illustration of the effect of Re and Pr on flow turbulence and the fully-developed flow characteristics. In particular, the Pr dependent variation in the turbulence intensity in the upper buoyant layer, and in the plume volume flux, have been shown to increase with reducing Re 2/Pr. © 2011 by Begell House, Inc.

  177. CONTROL OF RADIATIVE PROPERTIES OF COATINGS PIGMENTED WITH Fe2O3 NANOPARTICLES 査読有り

    Hiroki Gonome, Mehdi Baneshi, Atsuki Komiya, Shigenao Maruyama

    PROCEEDINGS OF THE ASME/JSME 8TH THERMAL ENGINEERING JOINT CONFERENCE 2011, VOL 1 PTS A AND B 1967-+ 2011年

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

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    This study describes nanoparticles pigmented coatings used in controlling the radiative properties of surfaces exposed to sunlight. An optimization method that embraces both thermal and aesthetic requirements has been proposed. The proposed coatings maximize the reflectivity of the near infrared (NIR) region to reduce thermal heating, while for aesthetic appeal they minimize the visible (VIS) reflected energy. This spectral behavior can be achieved by controlling the size and concentration of pigment particles and coating thickness. In this study, both experimental and numerical approaches are applied on Fe2O3 pigmented coating samples with 0.2 mu m and 1 pm of average particle size and different particle concentrations and coating thicknesses. For numerical part the radiation analysis using the Radiation Element Method by Ray Emission Model (REM2) in a one dimensional parallel plane model is conducted. From the numerical results, it is shown that the optinium size of Fe2O3 particles for our desired spectral behavior is about 0.8 mu m. The experimental results also show that the samples made from 1 mu m particles have better performance for our objective.

  178. ピストンクーリングチャネル内流動の可視化 査読有り

    小宮敦樹, 守谷修一, 小針達也, 小坂誠二, 仲野是克, 円山重直

    自動車技術会論文集 42 (1) 149-154 2011年1月

    出版者・発行元:自動車技術会

    ISSN:0287-8321

  179. Evidences of increasing primary production in the ocean by Stommel’s perpetual salt fountain 査読有り

    Shigenao Maruyama, Takashi Yabuki, Tetsuya Sato, Koutaro Tsubaki, Atsuki Komiya, Mikihito Watanabe, Hiroshi Kawamura, Katsumi Tsukamoto

    Deep-Sea Reserch Ⅰ 58 (5) 567-574 2011年

    出版者・発行元:None

    DOI: 10.1016/j.dsr.2011.02.012  

    ISSN:0967-0637

  180. Comparison between aesthetic and thermal performances of copper oxide and titanium dioxide nano-particulate coatings 査読有り

    Baneshi, M., Maruyama, S., Komiya, A.

    Journal of Quantitative Spectroscopy and Radiative Transfer 112 (7) 1197-1204 2011年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2010.08.032  

    ISSN:0022-4073

    eISSN:1879-1352

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    Nano-particulate coatings with high reflectance against solar irradiation can control undesirable thermal heating by sunlight absorption. It can reduce the energy consumption for air conditioning of houses and cars. For the objects covered by these coatings and subjected to human sight, e.g. roofing surfaces, high dazzle of reflected visible light can offend the human eyes and spoil the fine view of covered objects. The authors introduced a new optimization method in designing pigmented coatings which considers both thermal and aesthetic effects in previous studies. The optimization is possible by controlling the material, size and concentration of pigment particles. The proposed coatings maximize the reflectance of near infrared (NIR) region to care the thermal effects and minimize the visible (VIS) reflected energy to keep the dark tone because of aesthetic appeal. Two different types of copper oxide pigment particles namely cupric oxide (CuO) and cuprous oxide (Cu2O) were considered in this study. The optimum characteristics and performances are obtained and compared with titanium dioxide (TiO2) particle as a typical cool pigment. The results show that cupric oxide has much better performance for our objective. (C) 2010 Elsevier Ltd. All rights reserved.

  181. Thermal therapy and evaluation by a precise temperature control device 査読有り

    Maruyama, S., Takashima, S., Okajima, J., Komiya, A., Seki, T., Yambe, T.

    Heat Transfer - Asian Research 40 (2) 114-124 2011年

    DOI: 10.1002/htj.20334  

    ISSN:1099-2871 1523-1496

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    Moxibustion, one of the thermal therapies used in oriental medicine, has several problems, including the fact that temperature distribution over a treatment region is not uniform, the treatment temperature cannot be controlled, and smoke is emitted. To solve these problems, we developed a precise thermal heat transfer control device and applied it to clinical medicine as a substitute for conventional moxibustion. The abdominal heating controller developed in this study has an effect equal to that of moxibustion and can heat the treatment region of human skin uniformly. The treatment effect of the device was evaluated in a clinical experiment, in which we found that these devices can treat ileus, diarrhea, and related disorders. We sought the optimal temperature for thermal therapy with regard to gender, body mass index, and age. We carried out a numerical simulation of temperature distribution inside a human body when the abdominal region is heated. Temperature distribution of the heated abdominal region was calculated using a 2-D axisymmetric model considering bioheat generation such as blood perfusion and metabolism. The calculation results confirmed that the thermal effect cannot reach the viscera. © 2011 Wiley Periodicals, Inc.

  182. Combined heat transfer of radiation and natural convection in a square cavity containing participating gases 査読有り

    Lari, K., Baneshi, M., Gandjalikhan Nassab, S.A., Komiya, A., Maruyama, S.

    International Journal of Heat and Mass Transfer 54 (23-24) 5087-5099 2011年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.ijheatmasstransfer.2011.07.026  

    ISSN:0017-9310

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    This article deals with analyzing the effect of radiative heat transfer on natural convection heat transfer in a square cavity under normal room conditions. The governing equations of natural convection and radiative transfer are solved simultaneously to obtain the temperature, velocity and heat flux distributions inside the participating medium. The finite volume method has been adopted to solve the governing equations and the discrete ordinates method (DOM) is used to model the radiative transfer in absorbing -emitting media. The radiative-convective model is validated by comparison with test cases solutions from the literature. Then, the effects of Rayleigh number from 10(2) to 10(6) and optical thickness in a broad range from 0 to 100 on temperature and velocity distributions and Nusselt numbers are investigated. The results show that even under normal room conditions with a low temperature difference, the radiation plays a significant role on temperature distribution and flow pattern in the cavity. Also, several interesting effects of radiation are observed such as a sweep behavior on the isotherms, streamlines and velocity distributions of the cavity along the optical thickness and a reverse behavior on maximum stream function and convective Nusselt number at different Rayleigh numbers. (C) 2011 Elsevier Ltd. All rights reserved.

  183. Effect of Eddy Diffusivity on the Upwelling Flow Rate of Perpetual Salt Fountain 査読有り

    Atsuki Komiya, Mikihito Watanabe, Takashi Yabuki, Shigenao Maruyama

    Proceedings of the 21st International Symposium on Transport Phenomena CDROM 146 2010年11月2日

  184. 波長選択性を有したTiO2ナノ粒子群機能膜のふく射特性に関する研究 査読有り

    江目宏樹, メディバネシ, 小宮敦樹, 円山重直

    熱物性 24 (4) 177-182 2010年11月

    出版者・発行元:JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

    DOI: 10.2963/jjtp.24.177  

    ISSN:0913-946X

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    本研究では,可視光の反射をおさえ近赤外光の反射を増加させるという波長選択性を有する機能膜に関して,ナノ粒子としてTiO<sub>2</sub>を用いた機能膜を異なる粒径分布,体積分率,機能膜の膜厚において作成し,可視,近赤外領域の拡散反射率を測定した.また,機能膜の粒径分布に関して理論解析を行った.スペクトル反射率に対する粒子の粒径分布,体積分率,機能膜の膜厚の影響を示した.粒子の粒径分布は反射率の波長依存性に関係し,機能膜の体積分率と膜厚は反射率の大きさに影響することを示した。

  185. Measurement of the Concentration Dependency of Mass Diffusion Coefficients in Aqueous Binary Solutions by Phase-Shifting Interferometer 査読有り

    Atsuki Komiya, Juan Felipe Torres Alvarez, Junnosuke Okajima, Shigenao Maruyama

    Proceedings of the Ninth Asian Thermophysical Properties Conference CDROM ATPC9-109254 2010年10月19日

  186. AESTHETIC AND THERMAL PERFORMANCES OF BLACK CUPRIC OXIDE AND TITANIUM DIOXIDE NANO-PARTICULATE COATINGS 査読有り

    Mehdi Baneshi, Shigenao Maruyama, Atsuki Komiya

    VI. PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON RADIATIVE TRANSFER (RADIATIVE TRANSFER) 2010年8月

    出版者・発行元:BEGELL HOUSE, INC

    詳細を見る 詳細を閉じる

    Nano-particulate coatings with high reflectance against solar irradiation can control undesirable thermal heating by sunlight absorption. It can reduce the energy consumption for air conditioning of houses and cars. For the objects covered by these coatings and subjected to human sight, e.g. roofing surfaces, high dazzle of reflected visible light can offend the human eyes and spoil the fine view of covered objects. A new optimization method in designing pigmented coatings which considers both thermal and aesthetic effects by controlling the material, size and concentration of pigment particles is introduced. Our proposed coatings maximize the reflectance of near infrared (NIR) region to care the thermal effects and minimize the visible (VIS) reflected energy to keep the dark tone because of aesthetic appeal. Black cupric oxide and white titanium dioxide are considered as the pigment particles in this study. The optimum characteristics and performances of theses two pigments are obtained and compared. The results show that cupric oxide has much better performance for our objective.

  187. AN INVESTIGATION OF CONCENTRATION DEPENDENCY OF MASS DIFFUSION COEFFICIENTS IN MULTI-COMPONENT DIFFUSION 査読有り

    Atsuki Komiya, Juan F. Torres, Junnosuke Okajima, Shuichi Moriya, Shigenao Maruyama, Masud Behnia

    PROCEEDINGS OF THE ASME INTERNATIONAL HEAT TRANSFER CONFERENCE - 2010, VOL 2 555-560 2010年8月

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

    DOI: 10.1115/IHTC14-22501  

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    In this paper the concentration dependency of mass diffusion coefficients in binary system was investigated. We have developed a novel and accurate visualization system using a small area of transient diffusion fields by adopting a phase shifting technique. Through accurate visualization of the transient diffusion field, it is possible to determine the mass diffusion coefficient. Unlike a conventional interferometer, the proposed system provides high spatial resolution profiles of concent-ration even though the target area is less than 1.0 mm. This allows the measurement of local transient diffusion field with a high accuracy. The determination of mass diffusion coefficient of each component in multi-component system was also conducted. For the accurate and reliable measurement of mass diffusion coefficient, the experimental error should be taken into account. The experimental data usually contains unexpected accidental error and inherent errors of the measurement system. In this study, an optimization technique using conjugate gradient method is developed for the precise determination of the mass diffusion coefficients. The difference between the experimental and numerical concentration distribution is set as the objective function for the optimization method. The conjugate gradient method searches the optimal value by minimizing the objective function. For the concentration dependency evaluation, sodium chloride (NaCl) in pure water was selected as solute. For determination of each mass diffusion coefficient in multicomponent system, NaCl and lysozyme in buffer solution was selected. The experiments were performed under isothermal conditions. The proposed measurement method was validated by comparing the measured data with those available in the literature. The results indicated that the concentration dependency was successfully investigated from the experimental data. The mass diffusion coefficient of each component also could be determined from the experimental data as evidenced by good agreement with the published data. The difference between the reference and determined value of mass diffusion coefficient was less than 10%. It can be said that the diffusion of each solute inside the cell progresses independently within the dilute concentration ranges and the superposition principle of concentration of NaCl and lysozyme was satisfied. The influence of concentration of solution on the diffusion process and allowable concentration range of the superposition principle are determined and discussed.

  188. COOLING CHARACTERISTICS OF ULTRAFINE CRYOPROBE UTILIZING CONVECTIVE BOILING HEAT TRANSFER IN MICROCHANNEL 査読有り

    Junnosuke Okajima, Shigenao Maruyama, Hiroki Takeda, Atsuki Komiya, Sangkwon Jeong

    PROCEEDINGS OF THE ASME INTERNATIONAL HEAT TRANSFER CONFERENCE - 2010, VOL 1 297-306 2010年8月

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

    DOI: 10.1115/IHTC14-22550  

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    This paper describes a novel cooling system to be applied in cryosurgery. An ultrafine cryoprobe has been developed to treat small lesions which cannot be treated by conventional cryoprobes. The main problem of the ultrafine cryoprobe is the reduction of the heat transfer rate by the small flow rate due to the large pressure drop in a microchannel and the large ratio of the surface area to the volume. In order to overcome these problems, we utilized boiling heat transfer in a microchannel as the heat transfer mechanism in the ultrafine cryoprobe. The objectives of this paper are to develop an ultrafine cryoprobe and evaluate its cooling characteristics. The ultrafine cryoprobe has a co-axial double tube structure which consists of inner and outer stainless steel tubes. The outer and inner diameters of the outer tube are 0.55mm and 0.3mm, respectively. The outer and inner diameters of the inner tube are 0.15mm and 0.07mm, respectively. The inner tube serves as a capillary tube to change the refrigerant from liquid state to two-phase flow Furthermore, two-phase flow passes through the annular passage between the inner and out tube. The hydraulic diameter of the annular passage is 0.15mm. Furthermore, HFC-23 (Boiling point is -82.1 degrees C at 1atm) is used as the refrigerants. The temperature of the ultrafine cryoprobe was measured. The lowest temperatures were -45 degrees C in the insulated condition and -35 degrees C in the agar at -37 degrees C (which simulates in vivo condition). Furthermore, the frozen region which is generated around the ultrafine cryoprobe was measured 5mm from the tip of cryoprobe at 120s, and resulted to be 3mm in diameter. Moreover, the change of the refrigerant state is calculated by using the energy conservation equation and the empirical correlations of two-phase pressure drop and boiling heat transfer. As a result, the refrigerant state in the ultrafine cryoprobe depends on the external heat flux. Finally, the required geometry of the ultrafine cryoprobe to make high cooling performance is evaluated.

  189. NUMERICAL STUDY OF 3D NONLINEAR DISTURBANCE GROWTH IN TRANSITIONAL NATURAL CONVECTION 査読有り

    Tilek Aberra, Steven W. Armfield, Masud Behnia, Shigenao Maruyama, Atsuki Komiya

    PROCEEDINGS OF THE ASME INTERNATIONAL HEAT TRANSFER CONFERENCE - 2010, VOL 7 173-181 2010年8月

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

    DOI: 10.1115/IHTC14-23300  

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    Three dimensional boundary layer disturbance growth in natural convection adjacent to a uniformly heated vertical plate has been studied using a finite volume direct numerical simulation (DNS). The sequence of events associated with the intermediate stage of the spatial laminar-turbulent-transition for water, with Prandtl number Pr = 6.7, for the Rayleigh numbers in the range Ra-x approximate to 1 x 10(10) - 4 x 10(13), with perturbation parameters closely matching the experiment reported in [1], is investigated. Preliminary calculations confirm that this stage is characterized by the development of spatially periodic inner and outer span-wise vortices (shear layers), which travel in a differing fashion and speed; and a secondary mean flow system. The important route to natural convection flow breakdown, the arising of a double vortex mean longitudinal system, repeatedly suggested by past experiments, seems to be related to the complex and opposing behavior of these two layers.

  190. Infrared radiative properties of thin polyethylene coating pigmented with titanium dioxide particles 査読有り

    Baneshi, M., Maruyama, S., Komiya, A.

    Journal of Heat Transfer 132 (2) 2010年2月

    出版者・発行元:ASME-AMER SOC MECHANICAL ENG

    DOI: 10.1115/1.4000235  

    ISSN:0022-1481

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    The infrared (IR) radiative properties of TiO(2) pigment particles must be known to perform thermal analysis of a TiO(2) pigmented coating. Resins generally used in making pigmented coatings are absorbing at IR wavelengths, which means that the conventional Mie solution (MS) may not be adequate in this domain. There are two approaches to evaluating radiative properties in an absorbing medium: far field approximation (FFA) and near field approximation (NFA). In this study, after reviewing these two approaches, we evaluated the radiative properties of TiO(2) particles in polyethylene resin as an absorbing matrix in the wavelength range of 1.7-15 mu m based on the MS, FFA, and NFA. We then calculated the effective scattering and absorption coefficients for different models. To investigate the effect of the particle size and volume concentration on the transmittance of IR wavelengths, we made a nongray radiative heat transfer in an anisotropic scattering monodisperse pigmented layer, with independent scattering using the radiation element method by the ray emission model. The results showed that all three approaches predicted similar results in the particle size domain and volume fraction range utilized in pigmented coatings.

  191. タンパク質物質拡散現象における広域緩衝液の影響評価,熱物性 査読有り

    小宮敦樹, 円山重直, 守谷修一

    熱物性 24 (1) 15-20 2010年2月

    DOI: 10.2963/jjtp.24.15  

  192. Measurement of mass diffusion coefficient of multi-component system in aqueous media by phase shifting interferometer 査読有り

    Komiya, A., Torres, J.F., Maruyama, S.

    Defect and Diffusion Forum 297-301 624-+ 2010年

    出版者・発行元:TRANS TECH PUBLICATIONS LTD

    DOI: 10.4028/www.scientific.net/DDF.297-301.624  

    ISSN:1012-0386

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    This paper describes a novel technique to determine mass diffusion coefficients of multi-component system within a transparent mixture by using an optical system. The mixture is composed of sodium chloride and lysozyme as solutes. Binary and multi-component solution experiments were conducted separately under constant temperature conditions. By measuring transient diffusion fields inside the cell, as well as for mixed multi-component solutions, it was confirmed that within the concentration ranges considered in this study, the diffusion of each solute inside the cell progresses independently. This indicates the superposition principle of concentration for certain levels of sodium chloride and lysozyme within the cell. Furthermore, by using this concentration superposition principle and an inverse analysis based on the conjugate gradient method, the diffusion coefficients of each solute in the mixture were successfully obtained from several multi-component experiments. Each obtained diffusion coefficient was good agreement with the determined diffusion coefficient from binary experiment.

  193. Brain Mapping Method Utilizing Rapid Cooling Probe 査読有り

    H. Takeda, S. Maruyama, T. Yambe, N. Nakasato, A. Komiya

    International Journal of Transport Phenomena 11 147-163 2009年11月

  194. Experimental Trial to Determine Mass Diffusion Coefficients in Multi-component System 査読有り

    A. Komiya, J. F. Torres, J. Okajima, S. Maruyama

    The Proceedings of the 7th Pacific Symposium on Flow Visualization and Image Processing CD-ROM166 2009年11月

  195. A PROPOSAL OF LOW CO2 EMISSION POWER GENERATION SYSTEM UTILIZING OCEANIC METHANE HYDRATE 査読有り

    Shigenao Maruyama, Masazumi Chisaki, Atsuki Komiya, Ryo Shirakashi

    PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON POWER ENGINEERING 2009 (ICOPE-09), VOL 2 343-348 2009年11月

    出版者・発行元:JAPAN SOC MECHANICAL ENGINEERS

    詳細を見る 詳細を閉じる

    A novel power generation system with low carbon dioxide (CO(2)) emission was proposed. Thermal stimulation method was selected to dissociate the oceanic methane hydrate. By means of process simulation, the feasibility of proposed system was confirmed. A power generation system with approximately 40% thermal efficiency and above 90% CO(2) recovery rate was achieved. In this system, CO(2) due to the combustion is recovered by compressed seawater. CO(2) dissolved seawater is heated by the exhausted gas and injected to the hydrate layer to dissociate the methane hydrate. CO(2) is sequestrated simultaneously. Moreover, in order to quantify the heat loss during the injection of hot seawater to the hydrate layer, numerical simulation of the internal pipe flow was conducted. It was shown that the seawater temperature at the pipe outlet can be evaluated by the pipe diameter, thermal conductivity and the thickness of the insulation material.

  196. Precise and Rapid Cooling of Skin Tissue for Cryosurgery Utilizing Peltier Effect in Extremely Low Temperature 査読有り

    H. Takeda, J. Okajima, S. Aiba, A. Komiya, S. C. Mishra, S. Maruyama

    Proceedings of the 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics CD-ROM BS-5 19 2009年6月28日

  197. Boiling Heat Transfer in Small Channel for Development of Ultrafine Cryoprobe 査読有り

    J. Okajima, S. Maruyama, A. Komiya

    Proceedings of the 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics CD-ROM BS-7 (6) 20-1018 2009年6月28日

    出版者・発行元:None

    DOI: 10.1016/j.ijheatfluidflow.2010.08.008  

    ISSN:0142-727X

  198. Development and estimation of a novel cryoprobe utilizing the Peltier effect for precise and safe cryosurgery 査読有り

    Takeda, H., Maruyama, S., Okajima, J., Aiba, S., Komiya, A.

    Cryobiology 59 (3) 275-284 2009年

    出版者・発行元:ACADEMIC PRESS INC ELSEVIER SCIENCE

    DOI: 10.1016/j.cryobiol.2009.08.004  

    ISSN:0011-2240

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    We have developed a novel cryoprobe for skin cryosurgery utilizing the Peltier effect. The four most important parameters for necrotizing tissue efficiently are the cooling rate, end temperature, hold time and thawing rate. In cryosurgery for small skin diseases such as flecks or early carcinoma, it is also important to control the thickness of the frozen region precisely to prevent necrotizing healthy tissue. To satisfy these exacting conditions, we have developed a novel cryoprobe to which a Peltier module was attached. The cryoprobe makes it possible to control heat transfer to skin surface precisely using a proportional-integral-derivative (PID) controller, and because it uses the Peltier effect, the cryoprobe does not need to move during the operation. We also developed a numerical simulation method that allows us to predict the frozen region and the temperature profile during cryosurgery. We tested the performance of our Peltier cryoprobe by cooling agar, and the results show that the cryoprobe has sufficient cooling performance for cryosurgery, because it can apply a cooling rate of more than 250 degrees C/min until the temperature reaches -40 degrees C. We also used a numerical simulation to reconstruct the supercooling phenomenon and examine the immediate progress of the frozen region with ice nucleation. The calculated frozen region was compared with the experimentally measured frozen region observed by an interferometer, and the calculation results showed good agreement. The results of numerical simulation confirmed that the frozen region could be predicted accurately with a margin of error as small as 150 mu m during use of the cryoprobe in cryosurgery. The numerical simulation also showed that the cryoprobe can control freezing to a depth as shallow as 300 mu m. (C) 2009 Elsevier Inc. All rights reserved.

  199. Nutrient transport from an artificial upwelling of deep sea water 査読有り

    Williamson, N., Komiya, A., Maruyama, S., Behnia, M., Armfield, S.W.

    Journal of Oceanography 65 (3) 349-359 2009年

    出版者・発行元:SPRINGER

    DOI: 10.1007/s10872-009-0032-x  

    ISSN:0916-8370

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    The transport of nutrient-rich, deep sea water from an artificial upwelling pipe has been simulated. A numerical model has been built within a commercial Computational Fluid Dynamics (CFD) package. The model considers the flow of the deep sea water after it is ejected from the pipe outlet in a negatively buoyant plume (densimetric Froude number = -2.6), within a stably stratified ocean environment subject to strong ocean current cross flow. Two cross-flow profiles were tested with momentum flux ratios equal to 0.92 and 3.7. The standard k-epsilon turbulence model has been employed and a range of turbulent Schmidt and Prandtl numbers tested. In all cases the results show that the rapid diffusion of heat and salinity at the pipe outlet causes the plume to attain neutral buoyancy very rapidly, preventing strong fountain-like behavior. At the higher momentum flux ratio fountain-like behavior is more pronounced close to the pipe outlet. The strong cross-current makes horizontal advection the dominant transport process downstream. The nutrient plume trajectory remains largely within one relatively thin stratified layer, making any ocean cross-flow profile less important. Very little unsteady behavior was observed. The results show that the nutrient is reduced to less than 2% of its inlet concentration 10 meters downstream of the inlet and this result is largely independent of turbulent Prandtl or Schmidt number. Initial results would suggest that if such an artificial upwelling were to be viable for an ocean farming project, a large number of upwelling pipes would be necessary. Further work will have to determine the minimum nutrient concentration required to sustain a viable phytoplankton population and the required spacing between upwelling pipes.

  200. A new approach to optimizing pigmented coatings considering both thermal and aesthetic effects 査読有り

    Baneshi, M., Maruyama, S., Nakai, H., Komiya, A.

    Journal of Quantitative Spectroscopy and Radiative Transfer 110 (3) 192-204 2009年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2008.10.005  

    ISSN:0022-4073

    eISSN:1879-1352

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    Pigmented coatings with high reflectivity against solar irradiation can be used to control unwanted thermal heating that occurs as materials absorb sunlight such as heat in buildings that increases cooling loads. However, these surfaces produce glare that is unpleasant to the eye, and the coatings themselves can damage the appearance of the coated object. We introduce a new optimization method that embraces both thermal and aesthetic requirements. Our proposed coatings maximize the reflectivity of the near infrared (NIR) region to reduce thermal heating, while for aesthetic appeal they also minimize the visible (VIS) reflected energy received by human eyes, especially at wavelengths where eye sensitivity is high. The optimization parameter is defined as the ratio of the total reflected energy in the NIR region to that in the VIS region weighted by human eye sensitivity, Titanium dioxide is used as the pigment, and databases of its radiative properties are constructed using the Mie theory. To compute reflectivity, nongray radiative heat transfer in an anisotropic scattering monosized pigmented layer, with independent scattering, including direct and diffuse solar irradiations, is analyzed using radiation element method by ray emission model (REM2). Colors are calculated and optimization parameter is evaluated by using spectral reflectivity. Finally, the optimum values of particle size, volume fraction of pigment, and coating thickness are obtained. (c) 2008 Elsevier Ltd. All rights reserved.

  201. The effects of using some common white pigments on thermal and aesthetic performances of pigmented coatings 査読有り

    Baneshi, M., Maruyama, S., Komiya, A.

    Journal of Thermal Science and Technology 4 (1) 131-145 2009年

    出版者・発行元:JAPAN SOC MECHANICAL ENGINEERS

    DOI: 10.1299/jtst.4.131  

    ISSN:1880-5566

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    A coated surface with high reflectance in the near infrared (NIR) region and low reflectance in the visible (VIS) region can both stay cool in the sun and retain its appearance by reducing the glare of reflected sunlight. To design such coatings, an optimization method that embraces both thermal and aesthetic effects is introduced. White pigments are widely used in designing cool coatings due to their relatively high reflectance of sunlight. However, using white pigments may produce glare, which can cause visual discomfort. It is possible to control these effects by controlling the size of pigment particles, volume concentration of pigments and coating thickness. Among the various white pigments that are available, we chose titanium dioxide, zinc oxide and alumina for this study. Radiative heat transfer in an anisotropic scattering, monodisperse pigmented layer was analyzed using the radiation element method by ray emission model (REM2). Both collimated and diffuse solar irradiations were considered. The CIE (International Commission on Illumination) colorimetric system was used for color analysis. Finally, the optimum values of particle size, volume fraction of pigment, and coating thickness were obtained and compared for the three mentioned pigments.

  202. 高精度温度制御加熱装置による温熱治療とその評価 査読有り

    円山重直, 高島茂, 小宮敦樹, 関隆志, 山家智之

    日本機械学会論文集B編 75 (758) 2055-2059 2009年

    出版者・発行元:None

    DOI: 10.1299/kikaib.75.758_2055  

    ISSN:0387-5016

  203. Dimensionless solutions and general characteristics of bioheat transfer during thermal therapy 査読有り

    Okajima, J., Maruyama, S., Takeda, H., Komiya, A.

    Journal of Thermal Biology 34 (8) 377-384 2009年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jtherbio.2009.08.001  

    ISSN:0306-4565

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    The derivation and application of the general characteristics of bioheat transfer for medical applications are shown in this paper. Two general bioheat transfer characteristics are derived from solutions of one-dimensional Pennes&apos; bioheat transfer equation: steady-state thermal penetration depth, which is the deepest depth where the heat effect reaches: and time to reach steady-state, which represents the amount of time necessary for temperature distribution to converge to a steady-state. All results are described by dimensionless form; therefore, these results provide information on temperature distribution in biological tissue for various thermal therapies by transforming to dimension form. (C) 2009 Elsevier Ltd. All rights reserved.

  204. Heat-Transfer Control of Biological Tissue Utilizing Non-Equilibrium Thermo-Electric Device for Precise Cryosurgery 査読有り

    S. Maruyama, H. Takeda, S. Aiba, Y. Sasaki, A. Komiya

    Low Temperature Medicine 34 (4) 94-99 2008年12月

  205. The Effect of Particle Size Distribution on Performance of a Pigmented Coating Considering both Thermal and Aesthetic Effects 査読有り

    M. Baneshi, S. Maruyama, A. Komiya

    Proceedings of the Seventh JSME-KSME Thermal and Fluids Engineering Conference 2008年10月15日

  206. A Comparison for Diffusion Process of Artificial Upwelling of Nutrient-rich Seawater Simulation by k-e Model and Large Eddy Simulation 査読有り

    M. Chisaki, S. Maruyama, M. Perrette, A. Komiya, T. Yabuki

    Proceedings of the Second International Forum on Heat Transfer 20 2008年9月18日

  207. Development of Precise Heat Transfer Control Devices for Thermal Therapy 査読有り

    S. Takashima, N. Ogasawara, S. Maruyama, A. Komiya, T. Seki, T. Yambe

    Proceedings of the Second International Forum on Heat Transfe 86 2008年9月18日

  208. Precise Control of Cooling and Heating Rate Utilizing Peltier Cryoprobe for Cryosurgery 査読有り

    H. Takeda, S. Maruyama, J. Okajima, S. Aiba, A. Komiya

    Proceedings of the 19th International Symposium on Transport Phenomena 2008年8月

  209. Visualization of Upwelled Saline Flow and Its Transition Behaviour from Steady to Oscillatory Regimes 査読有り

    Atsuki Komiya, Nicholas Williamson, Nari Srinarayana, Masud Behnia, Steven Armfield, Shigenao Maruyam

    Proceedings of the 19th International Symposium on Transport Phenomena 2008年8月

  210. Visualization of Transient Concentration Field in Process of Carbon Dioxide Absorption at Gas-liquid Surface 査読有り

    A. Komiya, K. Maruta, Y. Nakano, T. Hashida

    Proceedings of International Symposium on Flow Visualization CD-ROM 2008年7月

  211. Design of plate-type actuator using SMA wire for assistant artificial heart muscle 査読有り

    Ryuta Ibuki, Shigenao Maruyama, Atsuki Komiya, Tomoyuki Yambe

    JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 19 (3) 359-365 2008年3月

    出版者・発行元:SAGE PUBLICATIONS LTD

    DOI: 10.1177/1045389X07084719  

    ISSN:1045-389X

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    A compact thin plate-type actuator using Ti-Ni-Cu shape memory alloy (SMA) wire is proposed and designed for its optimized motion to be applied as an assistant artificial heart muscle. The artificial heart muscle will assist by pushing weakened cardiac muscle that has been damaged by myocardial infarction and has lost its ability to contract. The actuator consists of a SMA wire, 250 gm in diameter, and a leaf spring that acts as a bias spring and cooling plate. The SMA wire is fixed at the end of the leaf spring to transform contraction motion into bending of the actuator. The shape of the actuator is controlled by on/off control of electric current applied via the SMA wire. Repeatable bending and releasing will be utilized for the heart assist application. This repeatable actuator motion will be able to assist up to 120 bpm (heartbeats per minute).

  212. Evaluation method for radiative heat transfer in polydisperse water droplets 査読有り

    Maruyama, S., Nakai, H., Sakurai, A., Komiya, A.

    Journal of Quantitative Spectroscopy and Radiative Transfer 109 (1) 1-15 2008年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.jqsrt.2007.05.006  

    ISSN:0022-4073

    eISSN:1879-1352

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    Simplifications of the model for nongray radiative heat transfer analysis in participating media comprised of polydisperse water droplets are presented. Databases of the radiative properties for a water droplet over a wide range of wavelengths and diameters are constructed using rigorous Mie theory. The accuracy of the radiative properties obtained from the database interpolation is validated by comparing them with those obtained from the Mie calculations. The radiative properties of polydisperse water droplets are compared with those of monodisperse water droplets with equivalent mean diameters. Nongray radiative heat transfer in the anisotropic scattering fog layer, including direct and diffuse solar irradiations and infrared sky flux, is analyzed using REM2. The radiative heat fluxes within the fog layer containing polydisperse water droplets are compared with those in the layer containing monodisperse water droplets. Through numerical simulation of the radiative heat transfer, polydisperse water droplets can be approximated by using the Sauter diameter, a technique that can be useful in several research fields, such as engineering and atmospheric science. Although this approximation is valid in the case of pure radiative transfer problems, the Sauter diameter is reconfirmed to be the appropriate diameter for approximating problems in radiative heat transfer, although volume-length mean diameter shows better accordance in some cases. The CPU time for nongray radiative heat transfer analysis with a fog model is evaluated. It is proved that the CPU time is decreased by using the databases and the approximation method for polydisperse particulate media. (C) 2007 Elsevier Ltd. All rights reserved.

  213. Estimation of temperature distribution in biological tissue by using solutions of bioheat transfer equation 査読有り

    Maruyama, S., Okajima, J., Komiya, A., Takeda, H.

    Heat Transfer - Asian Research 37 (6) 374-386 2008年

    DOI: 10.1002/htj.20210  

    ISSN:1099-2871 1523-1496

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    A living body has a system for maintaining its temperature. We have investigated the heat transfer characteristics common to each organ and therapy using heat transfer. The one-dimensional bioheat transfer equation with bioheat generation was converted into a dimensionless form and solved by Laplace transformation on the assumption that biological tissue is homogeneous. A dimensionless steady-state solution and transient solution were derived analytically. These solutions can represent the characteristics of the temperature distribution common to each organ. Comparison with numerical solutions has confirmed that these solutions can be applied to estimate the temperature distribution of inhomogeneous biological tissue. It is proved that the size of the region where temperature change occurs, the steady-state thermal penetration depth, is decided by biological properties. Furthermore, the time needed to reach a steady state, or the time it takes for biological tissue to reach a steady state, is calculated by using these solutions. Additionally, a temperature chart was proposed for each organ or tissue. This chart can serve as a guideline for medical doctors in formulating thermal therapy. © 2008 Wiley Periodicals, Inc.

  214. The Flexible Cryoprobe Using Peltier Effect for Heat Transfer Control 査読有り

    Maruyama, S., Nakagawa, K., Takeda, H., Aiba, S., Komiya, A.

    Journal of Biomechanical Science and Engineering 3 (2) 138-150 2008年

    DOI: 10.1299/jbse.3.138  

    ISSN:1880-9863

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    This paper describes a flexible cryoprobe utilizing the Peltier effect. The conventional cryoprobes have problems such as low flexibility and difficulty in precise temperature control. In this study, the cryoprobe composed of a flexible tube was developed to treat the inner part of the human body. The thermoelectric elements are attached on the top of the cryoprobe, so the Peltier effect makes it possible to control the heat-transfer of the cooling tip actively and to perform both cooling and heating only by reversing the electric current. The performance of the cryoprobe was evaluated through experiments of agar gel cooling and the temperature distribution was estimated by numerical simulation. In addition, an animal experiment using a guinea pig was conducted for practical application. In the experiment of an agar gel cooling, the agar gel surface was frozen within 10 seconds, which is in good agreement with numerical simulations. Repetition of cooling and heating are also performed experimentally. In the animal experiments, the temperature of the skin surface was monitored and its histological change was examined. Although the continuous cooling for 500 sec after freezing the skin surface could induce only the focal necrosis of the epidermis, the cyclic treatment of cooling and heating induced the necrosis of the whole epidermal layer and a part of eccrine glands. From experimental and numerical results, the cryoprobe could induce the necrosis of the skin. © 2008, The Japan Society of Mechanical Engineers. All rights reserved.

  215. Development of precise-temperature-controlled cooling apparatus for medical application by using Peltier effect 査読有り

    Shigenao Maruyama, Atsuki Komiya, Hiroki Takeda, Setsuya Aiba

    Proceedings of the International Conference on Biomedical Engineering and Informatics, Vol.2 610-+ 2008年

    出版者・発行元:IEEE COMPUTER SOC

    DOI: 10.1109/BMEI.2008.239  

    ISSN:1948-2914

    詳細を見る 詳細を閉じる

    This paper describes precise temperature controlled cooling apparatuses for medical application. A Peltier cryoprobe for dermis treatment and flexible cryoprobe for cryosurgery for deep region of human body were developed by utilizing the Peltier effect. The evaluation experiment of the Peltier cryoprobe was conducted. The proposed apparatus has enough performance to necrotize target diseased cells precisely. The proposed flexible cryoprobe is composed of a flexible resin tube enough to treat the deeper parts of the human body with a catheter. A Peltier element is attached at the top of the probe for active heat-transfer control of the cooling tip. The cooling experiments are carried out and the performance of the cryoprobe is evaluated. The achieved minimum temperature at the tip is -43 degrees C.

  216. Three-dimensional phonon transport simulation for nano/microstructured materials 査読有り

    Sakurai, A., Maruyama, S., Komiya, A., Miyazaki, K.

    International Journal of Nanoscience 7 (2-3) 103-112 2008年

  217. Design of plate-type actuator using SMA wire for assistant artificial heart muscle 査読有り

    Ibuki, R., Maruyama, S., Komiya, A., Yambe, T.

    Journal of Intelligent Material Systems and Structures 19 (3) 359-365 2008年

    出版者・発行元:SAGE PUBLICATIONS LTD

    DOI: 10.1177/1045389X07084719  

    ISSN:1045-389X

    詳細を見る 詳細を閉じる

    A compact thin plate-type actuator using Ti-Ni-Cu shape memory alloy (SMA) wire is proposed and designed for its optimized motion to be applied as an assistant artificial heart muscle. The artificial heart muscle will assist by pushing weakened cardiac muscle that has been damaged by myocardial infarction and has lost its ability to contract. The actuator consists of a SMA wire, 250 gm in diameter, and a leaf spring that acts as a bias spring and cooling plate. The SMA wire is fixed at the end of the leaf spring to transform contraction motion into bending of the actuator. The shape of the actuator is controlled by on/off control of electric current applied via the SMA wire. Repeatable bending and releasing will be utilized for the heart assist application. This repeatable actuator motion will be able to assist up to 120 bpm (heartbeats per minute).

  218. Numerical Simulation of Upwelling Flow in Pipe Generated by Perpetual Salt Fountain 査読有り

    Tetsuya Sato, Shigenao Maruyama, Atsuki Komiya, Koutaro Tsubaki

    Proceedings of the 16th Australasian Fluid Mechanics Conference 394-397 2007年12月

  219. Spatial-high-resolution Measurement of Diffusion Field for Evaluation of Concentration Dependency of Diffusion Coefficient 査読有り

    A. Komiya, S. Maruyama, S. Moriya

    Proceedings of The 8th Asian Thermophysial Properties Conference CD-ROM 095 2007年8月21日

  220. Phonon Transport Simulation for Nano/micro Scale Heat Conduction 査読有り

    A. Sakurai, S. Maruyama, K. Miyazaki, A. Komiya

    Proceedings of The 8th Asian Thermophysical Properties Conference CD-ROM 100 2007年8月

  221. Three-Dimensional Nongray Radiative Heat Transfer In Conjunction With Turbulent Natural Convection Using Dorem And LES 査読有り

    A. Sakurai, S. Maruyama, M. Behnia, A. Komiya, T. Kawabe

    Proceedings of the Fifth International Symposium on Radiative Transfer CD-ROM 48 2007年6月

  222. Discrete ordinates radiation element method for radiative heat transfer in three-dimensional participating media 査読有り

    Maruyama, S., Sakurai, A., Komiya, A.

    Numerical Heat Transfer, Part B: Fundamentals 51 (2) 121-140 2007年

    DOI: 10.1080/10407790600878726  

    ISSN:1040-7790 1521-0626

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    A new algorithm, the discrete ordinates radiation element method (DOREM), for modeling radiative heat transfer in inhomogeneous three-dimensional participating media is described. The DOREM uses advantages of the both the radiation element method (REM) and the discrete ordinates method. Benchmark comparisons are conducted against several radiation models. The DOREM successfully implements radiative heat transfer simulations precisely, since false scattering never occurs. The DOREM has advantages of computational speed against Monte Carlo, and the CPU time and the memory size of the DOREM are 82 times faster and 767 times smaller at the maximum than that of the REM.

  223. Continuous measurement of an artificial upwelling of deep sea water induced by the perpetual salt fountain 査読有り

    Tsubaki, K., Maruyama, S., Komiya, A., Mitsugashira, H.

    Deep-Sea Research Part I: Oceanographic Research Papers 54 (1) 75-84 2007年

    出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD

    DOI: 10.1016/j.dsr.2006.10.002  

    ISSN:0967-0637

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    A perpetual salt fountain can draw up deep sea water without any artificial energy source. This is one of the ideal ways to draw up deep sea water for nutrient enhancement application. A perpetual salt fountain experiment was carried out in May 2004. The estimated average velocity of the upwelling after 48 h from the start of the experiment was about 7 mm/s, and it continued for about 3 days. The flow rate with a single pipe was estimated as approximately 45 m(3)/day. The amount of upwelled deep sea water by this single pipe seems too small to be of benefit, but we can easily increase the amount by deploying a number of pipes. (c) 2006 Elsevier Ltd. All rights reserved.

  224. Computer simulation for postmortem cooling processes in the outer ear 査読有り

    Kanawaku, Y., Kanetake, J., Komiya, A., Maruyama, S., Funayama, M.

    Legal Medicine 9 (2) 55-62 2007年

    DOI: 10.1016/j.legalmed.2006.09.006  

    ISSN:1344-6223

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    Introduction: A simulation using a computer model was undertaken to investigate postmortem cooling patterns in the outer ear. Methods: Cooling patterns were analyzed using a 3-dimensional head model built from brain CT images of a volunteer. The simulation was verified with a case subject under constant environmental conditions to obtain an appropriate heat transmission coefficient. Results: The cooling pattern of the head model agreed with that of the case subject when the heat transmission coefficient was 6 W/m2 °C, and it could be approximated to a single exponential curve. Discussion: This is the first simulative study to show the postmortem cooling pattern of the head of an adult human. Our head model will prove useful to predict the cooling patterns of not only the outer ear but also of the entirety of the head. © 2006 Elsevier Ireland Ltd. All rights reserved.

  225. Effects of rounding errors on postmortem temperature measurements caused by thermometer resolution 査読有り

    Kanawaku, Y., Kanetake, J., Komiya, A., Maruyama, S., Funayama, M.

    International Journal of Legal Medicine 121 (4) 267-273 2007年

    出版者・発行元:SPRINGER

    DOI: 10.1007/s00414-006-0088-8  

    ISSN:0937-9827

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    Beginning 7 h after death, a datalogger was used to measure the temperature in the external auditory canal of an adult male body placed in a refrigerated room. The sequence of measured values approximated a single exponential function with a correlation coefficient of 0.998475. This suggests that the starting time of body cooling in the refrigerated room under constant temperature can be calculated with less error using any two data points recorded by the datalogger. However, the results of such calculations varied widely and longer postmortem intervals demonstrated greater calculation errors. Periodic errors also appeared. Mathematical simulations showed that this variation was caused by rounding errors, which represent the difference between the thermometer readings and the true temperature. The resolution of the thermometer was 0.1 degrees C, a normal specification; however, even this led to noticeable rounding errors. Therefore, significant errors may influence postmortem interval estimations using other body temperatures. When body temperatures are used to determine the time of death, a method that minimizes rounding errors should be considered.

  226. Development of precise visualization system for small transient diffusion field of protein using phase shifting interferometer 査読有り

    Atsuki Komiya, Shigenao Maruyama, Shuichi Moriya

    Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference 2007, Vol.3 CD-ROM 32617 393-399 2007年

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

    DOI: 10.1115/HT2007-32617  

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    This paper deals with a development of precise visualization system for mass diffusion field of micro quantity proteins by using phase shifting interferometer. The visualization system developed in this study could solve several measurement difficulties and accomplish quick and precise measurement of mass diffusion coefficient. For the observation of small transient diffusion field, Mach-Zehnder type phase shifting interferometer and small shearing cell were utilized. The designed small shearing cell requires only 10 micro liter solutions to form the transient diffusion field. As a target protein, lysozyme extracted from hen egg white was used. For the avoidance of protein denaturation, the lysozyme was dissolved in universal buffer solution over a wide pH range from pH 4.29 to 8.44. This range corresponds to that of digestive system in human body. Also, to investigate concentration dependency of mass diffusion coefficient, solutions over a wide range of concentration were prepared. The experimental results indicated that the concentration profile in a diffusion field could be detected clearly even though the field of view is smaller than 1.0mm square. The mass diffusion coefficient was derived by an analytical method proposed by authors. This method can derive mass diffusion coefficient as a function of concentration from one measurement datum. From the experimental data, the dependency of pH value of surrounding buffer and that of concentration on diffusion phenomena were discussed.

  227. Precise control of frozen region during cryosurgery utilizing peltier effect 査読有り

    Hiroki Takeda, Shigenao Maruyama, Setsuya Aiba, Atsuki Komiya

    Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference 2007, Vol.3 CD-ROM 32651 51-57 2007年

    出版者・発行元:AMER SOC MECHANICAL ENGINEERS

    DOI: 10.1115/HT2007-32651  

    詳細を見る 詳細を閉じる

    In cryosurgery it is necessary to control heat transfer precisely and actively in order to necrotize diseased part effectively and to avoid freezing healthy tissues. In order to control heat transfer, the cryoprobe utilizing peltier module was developed, This cryoprobe makes it possible to control cooling and heating rate actively and precisely due to peltier effect. Therefore, it is convenient to control the size of cell-destroyed area. In order to confirm cooling performance of the cryoprobe, gelatin cooling experiment and animal experiment was conducted, From the results.. it can be said that this cryoprobe has enough cooling performance to destroy undesirable cell and it can control cooling and heating rate actively. Numerical simulation which considers biological heat production, freezing of tissue and peltier effect at same time was developed in order to evaluate frozen region or necrotized area, which are difficult to be measured.

  228. 生体伝熱方程式の解析解による生体組織内温度分布の推定 査読有り

    圓山重直, 岡島淳之助, 小宮敦樹, 武田洋樹

    日本機械学会論文集B編 73 (9) 1899-1905 2007年

    DOI: 10.1299/kikaib.73.1899  

  229. Analytical Study of Temperature Distribution in Biological Tissue 査読有り

    J. Okajima, S. Maruyama, A. Komiya

    Proceedings of the 15th International Conference on Mechanics in Medicine and Biology 403-406 2006年12月

  230. Brain Mapping Method Utilizing Rapid Cooling Probe 査読有り

    S. Maruyama, H. Takeda, A. Komiya, T. Yambe, N. Nakasato

    Proceedings of the 17th International Symposium on Transport Phenomena CDROM-1DI4 2006年9月

  231. Conjugate Simulation of Nongray Radiative Heat Transfer and Natural Convection in a Participating Media Using DOREM, REM2, and LES 査読有り

    A. Sakurai, S. Maruyama, M. Behnia, A. Komiya, S. Sakai

    Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer 5 539-542 2006年9月

  232. Measurement of Mass Diffusion Coefficient of Micro Quantity Proteins Using Phase Shifting Interferometer 査読有り

    A. Komiya, S. Maruyama, S. Moriya

    Proceedings of the 13th International Heat Transfer Conference CDROM-MSTT-10 2006年8月

  233. Natural Convection and Radiative Heat Transfer of an Enclosure Containing a Participating Medium Using REM2 and LES 査読有り

    A. Sakurai, M. Behnia, S. Maruyama, A. Komiya, S. Sakai

    Proceedings of the Eurotherm78 – Computational Thermal Radiation in Participating Media II 399-409 2006年4月

  234. Flat-plate solar collector performance with coated and uncoated glass cover 査読有り

    Khoukhi, M., Maruyama, S., Komiya, A., Behnia, M.

    Heat Transfer Engineering 27 (1) 46-53 2006年

    出版者・発行元:TAYLOR & FRANCIS INC

    DOI: 10.1080/01457630500343009  

    ISSN:0145-7632

    詳細を見る 詳細を閉じる

    Most solar collectors employ a transparent cover plate often made of glass. These materials reflect around 8% of the incident solar radiation, which leads to the reduction in the collector heat output. The use of an antireflection coating could therefore improve the performance of such a system by increasing the transmitted energy through the glass cover. Recently, a silica low-reflection coating via a dip-coating process has been developed. The refractive index of the thin film is well controlled. The exact value of the film refractive index that leads to a minimum of reflection on the surface of the glass cover call be achieved. A comparison has been made between an uncoated flat-plate solar collector glass cover and one with a porous sol-gel antireflection coating. Using the porous sol-gel coating with the index of refraction of n = 1.23 on the glass cover of the solar collector increases the useful energy by a factor of approximately 1.05.

  235. In-situ measurement of small diffusion fields using a phase-shifting interferometer 査読有り

    Maruyama, S., Komiya, A.

    Journal of Flow Visualization and Image Processing 13 (3) 243-263 2006年

    DOI: 10.1615/JFlowVisImageProc.v13.i3.30  

    ISSN:1065-3090

    詳細を見る 詳細を閉じる

    Measurement systems for investigation of transient diffusion fields using an accurate interferometer have been developed. This system was composed of a real-time phase-shifting interferometer. Diffusion coefficients of aqueous solutions were measured using a shear cell and a counterflow-type cell. Rapid measurement was attained using the small test cell and the phase-shifting interferometer. The present shear cell system requires a few microlitters of test liquid. In order to shorten the measurement time, a counterflow-type test cell was developed. Mass diffusivity of the solution was derived. Measurement of double diffusive convection was carried out utilizing an active heat-transfer-control test cell. It is found that the double diffusion plume is observed within a very short measurement time less than 20 s and around the seed crystal of 0.5-mm height. Double diffusion fields and the crystal growth rates are investigated under transient double diffusive convection. The relation between the supersaturation on the crystal surfaces and crystal growth rate are investigated from the transient experiments. Copyright © 2006 Begell House, Inc.

  236. Precise and short-time measurement method of mass diffusion coefficients 査読有り

    Komiya, A., Maruyama, S.

    Experimental Thermal and Fluid Science 30 (6) 535-543 2006年

    DOI: 10.1016/j.expthermflusci.2005.11.001  

    ISSN:0894-1777

    詳細を見る 詳細を閉じる

    A novel technique for short-time measurement of mass diffusion coefficients in transparent liquids using counter flow type diffusion cell has been proposed. This observation system was composed of a small transient diffusion cell and real-time phase shifting interferometer. The diffusion cell is specially designed to make a stepwise distribution of concentration as an initial condition for shortening measurement time. In order to obtain mass diffusion coefficients precisely from observed mass diffusion fields, several experimental conditions under which the formula for deriving mass diffusion coefficients was applicable were clarified from the viewpoint of theoretical approach. In the present experiments, small transient diffusion fields can be observed more clearly by means of real-time phase shifting interferometer and small diffusion cell in comparison with conventional method. The mass diffusion coefficients of water solutions of sodium chloride, sodium chlorate and l-alanine over a wide range of concentrations were derived from measurement data whose elapsed time is within 30 s. The uncertainty evaluation of present data is also carried out, and they are in good agreement with reference data found in literature derived by conventional methods within the maximum error of ±8.5%. © 2005 Elsevier Inc. All rights reserved.

  237. Development of an Optical Visualization System for Small Transient Diffusion Fields 査読有り

    A. Komiya, S. Maruyama

    The Proceedings of 5th Pacific Symposium on Flow Visualization and Image Processing CDROM225 2005年9月26日

  238. In-Situ Measurement of Small Diffusion Field Using Phase- Shifting Interferometer 査読有り

    S. Maruyama, A. Komiya

    The Proceedings of 5th Pacific Symposium on Flow Visualization and Image Processing CDROM106 2005年9月26日

  239. Modelling of transition mechanisms from steady to oscillatory marangoni flows in a liquid bridge configuration 査読有り

    Yoda, S., Matsumoto, S., Komiya, A.

    Microgravity Science and Technology 15 (1) 269-273 2005年

    出版者・発行元:SPRINGER

    ISSN:0938-0108

    詳細を見る 詳細を閉じる

    In this paper, the transition mechanism from steady to oscillatory flow of Marangoni convection is investigated. Two-dimensional simulations for high Pr number fluids with several liquid bridge sizes were conducted in order to clarify the effect of temperature distribution on free surface upon the transition phenomena. The dependency of liquid bridge size on the onset of oscillatory flow was also evaluated. The results show that the formation of velocity distribution on the free surface is related to liquid bridge size and that it has a great influence on the onset of oscillation. From these results, a basic model for understanding the transition mechanism of Marangoni convection is proposed. In this transition model, the temperature distribution on the free surface was evaluated over a wide range of Pr numbers. A useful dimensionless parameter which indicates the onset of oscillation, the effective Marangoni number, is also proposed and evaluated.

  240. A New Simple Approach for Calculating The Optical Constants of A Clear Glass Window From 0.19 to 5μm 査読有り

    M. Khoukhi, S. Maruyama, S. Bosi, A. Komiya, M. Behnia

    Official Proceedings of The 29th Annual National Conference of the Solar Energy Society of Canada Inc. 2004年8月

  241. Modeling of Transition Mechanism to Oscillatory Marangoni Flow in a Liquid Bridge

    A. Komiya, S. Matsumoto, S. Yoda

    Proceedings of the 42nd AIAA Aerospace Sciences Meeting & Exhibit CD-ROM 2004年1月

  242. Description of the adhesive crystal growth under normal and micro-gravity conditions employing experimental and numerical approaches 査読有り

    Maruyama, S., Ohno, K., Komiya, A., Sakai, S.

    Journal of Crystal Growth 245 (3-4) 278-288 2002年

    DOI: 10.1016/S0022-0248(02)01574-9  

    ISSN:0022-0248

    詳細を見る 詳細を閉じる

    Investigation of the crystal growth in solutions is closely related to effective and high quality production of medicine, food and new materials. In the present study, experiments and numerical simulations were performed to explain the mechanism of crystal growth from an aqueous solution. In the experiment, transient double diffusion fields were observed by using an accurate optical measuring system. In the numerical simulation, transient double diffusion fields were calculated by a numerical simulation code, applying initial and boundary conditions obtained by experiment. The results of numerical simulation show good agreement with experimental results. Taking these two approaches into consideration, it was considered that adhesive crystal growth was dominated by the temperature dependence of the solutal diffusion coefficient. The microscopic mechanism of adhesive crystal growth is almost the same between micro-gravity and normal gravity conditions nevertheless, the macroscopic growth rate is different in each situation. Simulation of adhesive crystal growth can be performed easily using appropriate boundary conditions obtained by the present experiments. © 2002 Published by Elsevier Science B.V.

  243. 物質拡散係数の短時間測定法の開発 査読有り

    小宮敦樹, 円山重直

    熱物性 15 (4) 244-249 2001年10月

    出版者・発行元:JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

    DOI: 10.2963/jjtp.15.244  

    ISSN:0913-946X

    詳細を見る 詳細を閉じる

    物質拡散係数を短時間で高精度に測定する新しい測定法として対向流型拡散セルを考案し計測を行った。本測定法に用いた拡散セルは、濃度の異なる溶液を上下から注入し、その中心部で衝突させる仕組みになっており、初期濃度分布をほぼステップ状に与えることが可能である。本セル内に形成される微小濃度拡散場をリアルタイム位相シフト干渉計を用いて測定し、得られた非定常濃度拡散場から約20秒の測定で物質拡散係数を導出することができた。298Kにおける塩化ナトリウム水溶液を用いた実験結果は文献値と良く一致した。さらに塩素酸ナトリウム、Lアラニン水溶液の物質拡散係数の計測を広い濃度範囲で行った。

  244. Influence of Gravity upon Transient Diffusion Fields of Aqueous Solutions

    A. Komiya, S. Maruyama, S. Sakai, K.Tsukamoto

    Proceedings of the 2nd Pan-Pacific Basin Workshop on Microgravity Sciences CD-ROM 2001年5月

  245. Measurement of transient double diffusive convection and crystal growth using real-time phase-shifting interferometer 査読有り

    Maruyama, S., Takahashi, K., Komiya, A., Behnia, M.

    JSME International Journal, Series B: Fluids and Thermal Engineering 44 (4) 561-567 2001年

    出版者・発行元:JAPAN SOC MECHANICAL ENGINEERS

    DOI: 10.1299/jsmeb.44.561  

    ISSN:1340-8054

    詳細を見る 詳細を閉じる

    In the process of growing crystals in solutions, double diffusive convection due to thermal and solutal gradients occurs. A measurement system comprising a rapid heat-transfer control system and an accurate real-time phase-shifting interferometer has been developed to investigate the transient double diffusive convection. The heat-transfer control system has a small test-cell in which the liquid temperature is controlled by non-equilibrium thermoelectric devices. In-situ measurement of the transient double diffusive convection and crystal growth rates of NaClO3 are carried out by using this system. Transient double diffusive fields are observed directly and clearly. The crystal growth rates in the present experiments show similar tendencies to the data of microgravity experiments.

  246. Measurement of Transient Double Diffusive Convection and Crystal Growth Using Real-Time Phase-Shifting Interferometer 査読有り

    S. Maruyama, K. Takahashi, A. Komiya, M. Behnia

    Proceedings of the Symposium on Energy Engineering in the 21st Century (SEE 2000) 2 873-880 2000年1月

  247. Accurate Measurement of Mass Diffusion Field and Diffusion Coefficient Using Real-time Phase-shift Interferometer 査読有り

    S. Maruyama, A. Komiya, T. Shimoyama

    Proceedings of the 2nd Pacific Symposium on Flow Visualization and Image Processing CD-ROM 1999年5月

  248. Rapid yet accurate measurement of mass diffusion coefficients by phase shifting interferometer 査読有り

    Guo, Z., Maruyama, S., Komiya, A.

    Journal of Physics D: Applied Physics 32 (9) 995-999 1999年

    出版者・発行元:IOP PUBLISHING LTD

    DOI: 10.1088/0022-3727/32/9/309  

    ISSN:0022-3727

    詳細を見る 詳細を閉じる

    The technique of using a phase-shifting interferometer is applied to the study of diffusion in transparent liquid mixtures. A quick method is proposed for determining the diffusion coefficient from the measurements of the location of fringes on a grey level picture. The measurement time is very short (within 100 s) and a very small transient diffusion field can be observed and recorded accurately with a rate of 30 frames per second. The measurement can be completed using less than 0.12 cc of solutions. The influence of gravity on the measurement of the diffusion coefficient is eliminated in the present method. Results on NaCl-water diffusion systems are presented and compared with the reference data.

  249. Measurement of Diffusion Field and Crystal Growth Rate from Solution in Microgravity and Normal Gravity 査読有り

    S. Maruyama, J. Yabana, N. Sumi, A. Komiya, K. Tsukamoto, K Shimizu

    Proceedings of the Joint 1st Pan-Pacific Basin Workshop and 4th Japan-China Workshop on Microgravity Sciences 15 (2) 571-576 1998年7月

︎全件表示 ︎最初の5件までを表示

MISC 104

  1. 光駆動型マイクロ・ナノ流体デバイスの開発

    山田昇, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書 2019 (CD-ROM) 2021年

  2. ふく射要素法を用いたレーザー温熱治療に関する研究

    櫻井篤, 圓山重直, 中村勇友, 谷口壮馬, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書 2017 2019年

  3. 光駆動型マイクロ・ナノ流体デバイスの開発

    山田昇, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書 2017 2019年

  4. Numerical Evaluation of Boiling Heat Transfer Performance in Isothermal Microchannels 査読有り

    J. Okajima, A. Komiya

    Proceedings of the 11th Australasian Heat and Mass Transfer Conference 11AHMTC18-22 2018年7月

  5. Overview of “Dynamic Surf” project in Kibo – Dynamic behavior of large-scale thermocapillary liquid bridges in microgravity 査読有り

    Taishi Yano, Koichi Nishino, Satoshi Matsumoto, Ichiro Ueno, Atsuki Komiya, Yasuhiro Kamotani, Nobuyuki Imaishi

    International Journal of Microgravity Science and Application 35 (1) 350102 2018年

  6. ふく射要素法を用いたレーザー温熱治療に関する研究

    櫻井篤, 圓山重直, 中村勇友, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2015 2017年

  7. ふく射要素法を用いたレーザー温熱治療に関する研究

    櫻井篤, 圓山重直, 中村勇友, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書 2016 2017年

  8. 大規模環境でのふく射および対流によるエネルギー輸送に関する研究

    山田昇, 圓山重直, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2015 2017年

  9. 大規模環境でのふく射および対流によるエネルギー輸送に関する研究

    山田昇, 圓山重直, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書 2016 2017年

  10. 常温大気中におけるふく射場が乱流自然対流伝熱特性に及ぼす影響

    古川琢磨, 櫻井篤, 岡島淳之介, 小宮敦樹, 円山重直

    日本伝熱シンポジウム講演論文集(CD-ROM) 53rd 2016年

    ISSN:1346-1532

  11. 連載講座「高度物理刺激と生体応答(1)」第1章 高度物理刺激の生成法と計測・予測

    佐藤岳彦, 金澤誠司, 浜口智志, 小宮敦樹

    機械の研究 67 (8) 673-683 2015年8月

    出版者・発行元:株式会社 養賢堂

  12. 大気環境におけるふく射エネルギー評価とその解析

    圓山重直, 小宮敦樹, 岡島淳之介, 山田昇

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2014 2015年

  13. Experimental and Numerical Investigations of Local Heating of Biological Tissue for Laser Therapy

    T. Sugiura, T. Okabe, J. Okajima, A. Komiya, Y. Nakamura, A. Sakurai, V. Timochenko, T. Kodama, S. Maruyama

    Proceedings of the 15th International Symposium on Advanced Fluid Information 64-65 2015年

  14. D221 一定温度加熱による腹部の生体伝熱特性の変化

    岡島 淳之介, 岡部 孝裕, 小宮 敦樹, 関 隆志, 円山 重直

    熱工学コンファレンス講演論文集 2014 "D221-1"-"D221-2" 2014年11月8日

    出版者・発行元:一般社団法人日本機械学会

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    To evaluate the effects of thermal therapy quantitatively, the variation of blood perfusion rate during prolonged heating was estimated by measuring heat flux. The abdominal heating controller was used as a heating device. A heat flux sensor was installed between the heating disk of the abdominal heating controller and abdominal area. When the surface temperature was around 43℃, the obvious and gradual increment of heat flux was observed. By assuming quasi-steady state, the time variation of blood perfusion rate was estimated by an analytical solution of bioheat transfer equation. The experiment was conducted to four subjects and the amplification of blood perfusion rate were confirmed.

  15. 1305 ストリークカメラを用いた水中ストリーマの高時間分解解析

    藤田 英理, 金澤 誠司, 大谷 清伸, 小宮 敦樹, 金子 俊郎, 佐藤 岳彦

    流体工学部門講演会講演論文集 2014 "1305-1"-"1305-2" 2014年10月25日

    出版者・発行元:一般社団法人日本機械学会

    ISSN:1348-0251

    詳細を見る 詳細を閉じる

    The highly temporal streak imaging of an underwater discharge revealed that the primary streamer propagation was intermittent though the propagation had been considered continuous from our previous study. In addition, the intermittent luminescence pattern was synchronized with the pattern of discharge pulsed currents. The primary streamer in ultrapure water was generated by the application of a single-shot pulsed positive high voltage with a duration of 10 μs to a needle-wire electrode system with the tip radius of 40 μm and with the gap distance of 6 mm.

  16. 22am2-F2 液滴前方に存在する先行薄膜の光学的二次元可視化計測

    中村 槙悟, 小宮 敦樹, 岡島 淳之介, 円山 重直

    マイクロ・ナノ工学シンポジウム 2014 (6) "22am2-F2-1"-"22am2-F2-2" 2014年10月20日

    出版者・発行元:一般社団法人日本機械学会

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    In this study, we have carried out an experimental investigation with regard to the dynamics of the fluid in the vicinity of the boundary line of three phases; solid-liquid-gas interface, which is so-called "contact line", and dynamic behavior of the liquid thin film in front of the moving contact line. This liquid thin film has been known as the precursor film. To visualize the dynamic behavior of the precursor film, we have introduced the novel optical method for real-time and two-dimensional thickness distribution measurement based on conventional ellipsometry and phase-shifting technique. By using this method, the precursor film was visualized, and the length and thickness of the precursor film was measured quantitatively.

  17. 第15回国際伝熱会議国際科学委員会(ISC)報告:IDL・プログラム報告 招待有り

    小宮敦樹

    伝熱 53 (225) 16-18 2014年10月

    出版者・発行元:日本伝熱学会

    ISSN:1344-8692

  18. 222 マイクロチャネル内相変化伝熱による気泡膨張挙動の数値解析(フェロー賞対象講演III)

    相澤 優太, 岡島 淳之介, 小宮 敦樹, 円山 重直

    日本機械学会東北支部秋季講演会講演論文集 2014 (50) 41-42 2014年9月5日

    出版者・発行元:一般社団法人日本機械学会

  19. 大気環境におけるふく射エネルギー評価とその解析

    圓山重直, 小宮敦樹, 岡島淳之介, 山田昇

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2013 2014年

  20. G061052 異なる被覆材を用いた温室効果の解析的および実験的研究([G061-05] 熱工学部門,一般セッション(5) : ふく射,燃焼(1))

    アルマハドウリ アディル, 江目 宏樹, 岡島 淳之介, 小宮 敦樹, 円山 重直

    年次大会 : Mechanical Engineering Congress, Japan 2013 "G061052-1"-"G061052-5" 2013年9月8日

    出版者・発行元:一般社団法人日本機械学会

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    In the present study, a theoretical non-gray rigorous model was established to study the radiative heat transfer through greenhouse covering materials by using Radiative Element Method by Ray Emission Model (REM2). This model was applied to find the difference in thermal performances between silica glass, polyvinylchloride (PVC) and low density polyethylene (LDPE) covering materials. Using the advantage of the previously predicted spectral radiative properties of these materials, accurate estimations of greenhouse temperatures were achieved. In addition, an outdoor experiment was conducted to measure the thermal performances of three rectangular enclosures covered by the mentioned claddings. Enclosures inside, floor and cover temperatures calculated using the rigorous model showed a satisfactory correlation with the experimental measurements

  21. 第50回日本伝熱シンポジウムの報告

    圓山 重直, 小宮 敦樹, 小澤 守, 田部 豊

    伝熱 : journal of the Heat Transfer Society of Japan 52 (220) 11-14 2013年7月1日

    出版者・発行元:日本伝熱学会

    ISSN:1344-8692

  22. 143 水中1次ストリーマの進展過程(流体工学II,一般講演)

    藤田 英理, 金澤 誠司, 大谷 清伸, 小宮 敦樹, 佐藤 岳彦

    講演論文集 2013 (48) 88-89 2013年3月15日

    出版者・発行元:一般社団法人日本機械学会

  23. 114 沖ノ鳥島海洋緑化に向けた湧昇パイプの展開方法に関する研究(熱工学II,一般講演)

    古川 琢磨, 矢吹 崇, 守谷 修一, 岡島 淳之介, 小宮 敦樹, 市川 正和, 塩原 泰, 竹原 洋一郎, 石川 陽一, 円山 重直

    講演論文集 2013 (48) 32-33 2013年3月15日

    出版者・発行元:一般社団法人日本機械学会

  24. ふく射要素法を用いた生体内光伝播と伝熱現象に関する研究

    圓山重直, 櫻井篤, 小宮敦樹, 岡島淳之介

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2012 2013年

  25. 大気環境におけるふく射エネルギー評価とその解析

    圓山重直, 小宮敦樹, 岡島淳之介, 山田昇

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2012 2013年

  26. INSA de Lyon 滞在日記

    小宮 敦樹

    伝熱 : journal of the Heat Transfer Society of Japan 52 (218) 44-46 2013年1月1日

    出版者・発行元:日本伝熱学会

    ISSN:1344-8692

  27. Instability of Natural Convective Flows inside Tilted Cubic Cavities

    J.F. Torres, D. Henry, A. Komiya, S. Maruyama

    Abstract Book of 2013 Anuual ELyT Workshop Poster-F2 2013年

  28. Reducing Thermal Radiation Heat Transfer with Interferences

    Y. Tsurimaki, P.-O. Chapuis, R. Vaillon, T. Kobari, J. Okajima, A. Komiya, S. Maruyama

    Proceedings of the 7th International Symposium on Radiative Transfer, RAD-13 RAD-13-P17 2013年

  29. In-situ Measurement of Local Thermal Diffusivity of Various Beefs by Inverse Analysis

    T. Okabe, J. Okajima, A. Komiya, I. Takahashi, S. Maruyama

    ATPC2013 technical digest 318 2013年

  30. Theoretical Method for Designing Ultraviolet Shield Coatings

    H. Gonome, J. Okajima, A. Komiya, S. Maruyama

    ATPC2013 technical digest 98 2013年

  31. Development of Thermal Barrier Coating for Black Automobiles

    H. Gonome, M. Baneshi, J. Okajima, A. Komiya, S. Maruyama

    Proceedings of Tenth International Conference on Flow Dynamics 308-309 2013年

  32. Variability of Thermal Conductivity Measurement for High-Density Glass Wool by Using Guarded Hot Plate Apparatus Utilizing Peltier

    T. Kobari, J. Okajima, A. Komiya, S. Maruyama

    Proceedings of Tenth International Conference on Flow Dynamics 688-689 2013年

  33. An Experimental Comparison between Thermal Diffusivity and Blood Perfusion Rate of Living and Dead Tissue by Inverse Analysis

    T. Okabe, J. Okajima, Y. Luo, F. Wang, A. Komiya, S. Maruyama

    Proceedings of Tenth International Conference on Flow Dynamics 464-465 2013年

  34. Effect of Beam Deflection on Measurement of Boundary LayersUsing Phase-shifting Interferometer

    E. Shoji, R. Nakaoku, A. Komiya, J. Okajima, S. Maruyama

    Proceedings of Tenth International Conference on Flow Dynamics 660-661 2013年

  35. Numerical Study of Natural Convection in a Tilted Cubical Cavity: Effects of the Prandtl number on the Stability of the Flow

    J.F. Torres, D. Henry, A. Komiya, J. Okajima, S. Maruyama

    Proceedings of the Thirteenth International Symposium on Advanced Fluid Information 36-37 2013年

  36. 水中プラズマのストリーマ進展過程

    藤田 英理, 佐藤 岳彦, 金澤 誠司, 大谷 清伸, 小宮 敦樹

    電気学会研究会資料. PST, プラズマ研究会 2012 (107) 21-24 2012年12月10日

  37. J024043 加熱条件下の熱流束測定による生体組織の血液かん流率の推定

    岡島 淳之介, 高島 茂, 岡部 孝裕, 小宮 敦樹, 円山 重直

    年次大会 : Mechanical Engineering Congress, Japan 2012 "J024043-1"-"J024043-5" 2012年9月9日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    In order to improve various thermal therapies quantitatively, blood perfusion rate in living tissue was estimated by measuring heat flux, and its temperature dependency was evaluated. The abdominal heating controller was used for heating. A heat flux sensor was installed between the heating disk of the abdominal heating controller and abdominal area. The time variation of heat flux and surface temperature were recorded by data logger. By measuring four subjects, the positive correlation between the heat flux and surface temperature was confirmed. The analytical relationship the among heat flux, surface temperature and blood perfusion rate were derived by using analytical solution of 1 -D bioheat transfer equation. According to this relationship, blood perfusion rate of each subject was estimated. As well as the heat flux, blood perfusion rate had positive correlation to surface temperature, namely temperature dependency of blood perfusion rate.

  38. S055012 水中ストリーマ進展過程の可視化

    佐藤 岳彦, 藤田 英理, 金澤 誠司, 大谷 清伸, 小宮 敦樹

    年次大会 : Mechanical Engineering Congress, Japan 2012 "S055012-1"-"S055012-2" 2012年9月9日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    A series of photographs for a streamer propagation process in water was successfully observed using a nano-pulse discharge system, an ultra high speed camera system with a microscope lens and a phase shift type Mach-Zehnder interferometer. After the initiation process of 600 ns - 800 ns from the applying voltage of 16 kV_<0p> - 17.5 kV_<0p>, a primary streamer occurred. It accompanied with a shock wave and the period of the propagation was several hundred ns. The propagation velocity of the primary streamer was around 1.5 km/s.

  39. 309 水中プラズマのストリーマ形成過程(大気環境保全・改善技術(2))

    藤田 英理, 金澤 誠司, 大谷 清伸, 小宮 敦樹, 佐藤 岳彦

    環境工学総合シンポジウム講演論文集 2012 (22) 209-210 2012年7月3日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    A continuous photograph of a streamer propagation process in water was successfully observed using a nano-pulse discharge system, an ultra high speed camera system with a microscope lens and a phase shift type Mach-Zehnder interferometer. After the initiation process of 600 ns - 800 ns from the applying voltage of 16 kV0p-17.5 kV0p, a primary streamer was occurred. It accompanied with a shock wave and the period of the propagation was several hundred ns. The propagation velocity of the primary streamer was around 1.5 km/s.

  40. 233 多孔質断熱材のふく射熱伝導率の温度依存性に関する基礎的研究(学生賞V,一般講演)

    小針 達也, 岡島 淳之介, 小宮 敦樹, 円山 重直

    講演論文集 2012 (47) 272-273 2012年3月13日

    出版者・発行元:一般社団法人日本機械学会

  41. 238 コモンパス位相シフト干渉計による自然対流場の高精度計測(学生賞VI,一般講演)

    庄司 衛太, 小宮 敦樹, 岡島 淳之介, 円山 重直

    講演論文集 2012 (47) 282-283 2012年3月13日

    出版者・発行元:一般社団法人日本機械学会

  42. ふく射要素法を用いた生体内光伝播と伝熱現象に関する研究

    圓山重直, 櫻井篤, 小宮敦樹, 佐藤善幸

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2011 2012年

  43. サブマイクロ粒子を用いた波長選択膜のふく射特性

    江目宏樹, BANESHI Mehdi, 岡島淳之介, 小宮敦樹, 山田昇, 円山重直

    Thermophysical Properties 33rd 2012年

    ISSN:0911-1743

  44. GPSラジオゾンデを用いた大気放射フラックスの気球観測

    山田昇, 岡島淳之介, 櫻井篤, 小宮敦樹, 円山重直

    Thermophysical Properties 33rd 2012年

    ISSN:0911-1743

  45. 自由液膜内温度差マランゴニ対流場の転移ダイナミクス −「界面熱流体システムにおける熱物質輸送現象とその制御」活動報告−

    上野一郎, 小宮敦樹, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡, 益子岳史

    第28回宇宙利用シンポジウム 0-0 2012年1月

  46. Radiative heat transfer and heating effect of radiation heater for thermal therapy

    円山重直, 小笠原直也, 岡島淳之介, 小宮敦樹, 関隆志

    The Memoirs of the Institute of Fluid Science, Tohoku University 23 13-19 2012年

  47. Evaluation and Analysis of Atmospheric Radiative Energy Transfer

    N. Yamada, J. Okajima, A. Sakurai, A. Komiya, S. Maruyama

    Proceedings of the Twelfth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 72-73 2012年

  48. Analysis of Axisymmetric Radiative Heat Transfer in Biological Tissue using the Radiation Element Method

    S. Maruyama, Y. Sato, A. Sakurai, J. Okajima, M. Baneshi, A. Komiya

    Proceedings of Eighth International Conference on Flow Dynamics 534-535 2011年11月

  49. The Effect of Dispersed State to Control of Radiative Properties of Coatings Pigmented with Nanoparticles

    H. Gonome, M. Baneshi, J. Okajima, A. Komiya, S. Maruyama

    Proceedings of Eighth International Conference on Flow Dynamics 508-509 2011年11月

  50. J024023 冷媒循環システムを利用した極細クライオプローブによる凍結領域制御([J02402]バイオにおける流れと熱・物質移動(2))

    岡島 淳之介, 小宮 敦樹, 円山 重直

    年次大会 : Mechanical Engineering Congress, Japan 2011 "J024023-1"-"J024023-4" 2011年9月11日

    出版者・発行元:一般社団法人日本機械学会

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    This paper describes a novel cryosurgical system in order to conduct cryosurgery for a small affected area. An ultrafine cryoprobe to generate a small frozen region and a refrigerant circulation system not to emit the refrigerant into atmosphere were used. This system consists of the ultrafine cryoprobe, the reservoir to store liquid refrigerant, the condenser to condense the refrigerant in vapor state and several valves. In the refrigerant recovery process, the condensed refrigerant was changed its state to room temperature by heating and returned to reservoir. HFC-23, which is alternative Freon, was used as refrigerant and the agar at 37°C was used as a cooling object to simulate a biological tissue. Moreover, this system was able to control the frozen region by using the bypass valve and its effectiveness was confirmed by the freezing experiment. In the freezing experiment, the temperature of cryoprobe surface reached at ?25°C and the frozen region of 2 mm in radius was generated in 20 seconds. Furthermore, the controllability of frozen region was also confirmed by changing the time to open bypass valve.

  51. 8I-09 レーザー治療における生体組織内の光伝播・熱伝導連成解析(OS-12 バイオヒート・マストランスファー(1))

    円山 重直, 佐藤 善幸, 小宮 敦樹, 櫻井 篤

    バイオエンジニアリング講演会講演論文集 2010 (23) 177-178 2011年1月7日

    出版者・発行元:一般社団法人日本機械学会

  52. 離散方位ふく射要素法を用いたふく射・対流複合伝熱解析

    圓山重直, 櫻井篤, 小宮敦樹

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 2010 2011年

  53. 大規模環境におけるエネルギー移動評価とその解析

    圓山重直, 山田昇, 小宮敦樹

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書 第14 40-41 2011年

  54. 点接触式熱物性測定法を利用した軟質材料及び液体の熱物性測定

    小宮 敦樹, 眞下 央, 岡島 淳之介, 高橋 一郎, 円山 重直

    Thermophysical properties 31 158-160 2010年11月17日

    ISSN:0911-1743

  55. Development of ultrafine cryoprobe for cryosurgery in small scale

    J. Okajima, A. Komiya, S. Maruyama

    Low Temperature Medicine 36 35 2010年11月

  56. Bio Heat Transfer

    小宮 敦樹

    伝熱 : journal of the Heat Transfer Society of Japan 49 (209) 19-19 2010年10月1日

    ISSN:1344-8692

  57. 122 TiO_2ナノ粒子群機能膜のふく射特性に関する研究(学生賞IV,一般講演)

    江目 宏樹, BANESHI Mehdi, 小宮 敦樹, 円山 垂直

    講演論文集 2010 (45) 46-47 2010年3月12日

    出版者・発行元:一般社団法人日本機械学会

  58. 124 海洋実験及び海洋観測データによる永久塩泉の可能性(学生賞IV,一般講演)

    渡邉 幹仁, 矢吹 崇, 小宮 敦樹, 円山 重直

    講演論文集 2010 (45) 50-51 2010年3月12日

    出版者・発行元:一般社団法人日本機械学会

  59. C224 ナノ粒子散布による地球冷却の可能性(マイクロ・ナノスケールの熱輸送現象IV)

    円山 重直, 長山 岳史, 小宮 敦樹

    熱工学コンファレンス講演論文集 2009 245-246 2009年11月6日

    出版者・発行元:一般社団法人日本機械学会

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    Nanoparticles in the atmosphere affect the energy balance of the earth. In general, it is known that they have a cooling effect on the atmosphere near the surface of the earth. Therefore, we are now focusing on the cooling effect by considering artificially formed nanoparticle layer which are dispersed in the atmosphere so that we can control global warming. In this study, the feasibility of global warming control by dispersing nanoparticles in the atmosphere is examined. The equivalent temperature decrease by nanoparticle layers is converted to a reduction of CO_2, and this CO_2 reduction is compared with the CO_2 output required to form the nanoparticle layers in the atmosphere. The reduction of CO_2 equivalent to temperature decrease due to nanoparticle dispersion is very large compared with the CO_2 output due to the object launch. Therefore, it is inferred that this method presents a feasible solution to the global warming problem.

  60. 112 温度制御された黒体炉とふく射伝熱解析による放射温度計の高精度計測(学生賞II)

    小笠原 直也, 円山 重直, 小宮 敦樹

    講演論文集 2009 (44) 22-23 2009年3月13日

    出版者・発行元:一般社団法人日本機械学会

  61. 218 海洋深層水汲み上げのための係留パイプ系の設計 : 流線型パイプの導入(熱工学)

    矢吹 崇, 知崎 正純, 小宮 敦樹, 円山 重直

    講演論文集 2009 (44) 228-229 2009年3月13日

    出版者・発行元:一般社団法人日本機械学会

  62. 「界面熱流体システムにおける熱物資輸送現象とその制御」研究班 WG活動報告

    上野一郎, 小宮敦樹, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡, 益子岳史

    第25回宇宙利用シンポジウム講演論文集 319-322 2009年1月

  63. 第18回ヨーロッパ熱物性会議に参加して

    小宮 敦樹

    熱物性 : Japan journal of thermophysical properties 22 (4) 236-237 2008年11月30日

    ISSN:0913-946X

  64. 位相シフト干渉計を用いた濃度計測と逆問題解析による物質拡散係数の導出

    岡島 淳之介, 小宮 敦樹, 円山 重直

    Thermophysical properties 29 278-280 2008年10月8日

    ISSN:0911-1743

  65. 115 腹部温熱制御機器を用いた温熱療法の伝熱制御(学生賞III)

    高島 茂, 円山 重直, 小宮 敦樹, 小笠原 直也, 関 隆志, 山家 智之

    講演論文集 2008 (43) 31-32 2008年3月15日

    出版者・発行元:一般社団法人日本機械学会

  66. 110 逆問題解析による濃度依存性を考慮した物質拡散係数導出法の検討(学生賞II)

    岡島 淳之介, 小宮 敦樹, 円山 重直

    講演論文集 2008 (43) 21-22 2008年3月15日

    出版者・発行元:一般社団法人日本機械学会

  67. 日本熱物性学会賞奨励賞を受賞して

    小宮 敦樹

    熱物性 : Japan journal of thermophysical properties 22 (1) 11-11 2008年2月29日

    ISSN:0913-946X

  68. 「コンンタクトライン近傍流体の動力学」研究班WG活動宇宙環境における生物流体現象ー宇宙環境利用科学委員会研究班WG活動報告

    上野一郎, 小宮敦樹, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡

    第24回宇宙利用シンポジウム 2008年1月

  69. A Comparison for Diffusion Process of Artificial Upwelling of Nutrient-Rich Seawater Simulated by κ-εModel and Large Eddy Simulation

    M. Chisaki, S. Maruyama, M. Perrette, A. Komiya, T. Yabuki

    IFHT2008 The Second International Forum on Heat Transfer 2008年

  70. C231 炭酸ガス吸収過程における気-液界面近傍濃度場の不安定性(界面)

    小宮 敦樹, 丸田 薫, 仲野 是克, 橋田 俊之

    熱工学コンファレンス講演論文集 2007 263-264 2007年11月23日

    出版者・発行元:一般社団法人日本機械学会

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    A study on the visualization of the absorption process in the vicinity of the gas-liquid interface was performed. The system in which CO_2 was absorbed into amine solvents and diffused toward the interior of liquid phase was visualized. The interferogram pattern obtained by phase shifting interferometer showed that the increasing of concentration field instability in liquid phase was observed as time advanced or pressure of the gas phase was increased. This was caused by the density increase of the amine absorbing CO_2 and the liquid was affected by the negative buoyant force which generated natural convection locally. Therefore, pseudo diffusion coefficient in this system was determined larger than that of the molecular diffusion system. It was considered that the self-generated instability enhanced the mass transfer of CO_2 in the vicinity of interface and liquid phase.

  71. 溶液中への炭酸ガス吸収過程における表面近傍対流の影響(対流(2),一般講演)

    小宮 敦樹, 丸田 薫, 仲野 是克, 橋田 俊之

    日本流体力学会年会講演論文集 2007 175-175 2007年

    出版者・発行元:日本流体力学会

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    The absorption process in the vicinity of the gas-liquid interface was visualized in the system where CO_2 was absorbed into amine solvents and diffused toward the interior of liquid phase. From the interferogram obtained by phase shifting interferometer, the increasing of concentration field instability in the liquid phase was observed as time advanced or pressure of the gas phase was increased. This was because the density of the amine absorbing CO_2 increased and the liquid was affected by the gravitational force. Therefore, pseudo diffusion coefficient was obtained larger than that of the molecular diffusing system. It was considered that the self-generated instability enhanced the mass transfer of CO_2 in the vicinity of interface and liquid phase.

  72. 「界面現象と流体不安定性研究」ワーキンググループ活動報告

    松本聡, 鴨谷康弘, 今石宣之, 河村 洋, 西野耕一, 川路正裕, 上野一郎, 小宮敦樹, 大平博昭, 益子岳史

    第23回宇宙利用シンポジウム 98-100 2007年1月

  73. 「コンタクトライン近傍流体の動力学」研究班WG活動報告

    上野一郎, 小宮敦樹, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡

    第23回宇宙利用シンポジウム 90-93 2007年1月

  74. F225 細線形状記憶合金を利用した人工筋肉の繰返し動作評価(バイオ・食品における輸送特性の測定2)

    伊吹 竜太, 円山 重直, 小宮 敦樹, 山家 智之

    熱工学コンファレンス講演論文集 2006 377-378 2006年11月23日

    出版者・発行元:一般社団法人日本機械学会

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    This paper describes evaluation about repeatable motion of an actuator using thin SMA wire applied for assistant artificial heart muscle. Ti-Ni-Cu wire covered by polyimide tube is combined with thin phosphor bronze plate to make actuator, which is small enough to implant in human body. Actuator elastically bends in arch shapes with electrical pulse application. Numerical evaluation using finite element method shows low consumption motion of the actuator with short time pulse application. Motion response of the actuator in water maintained at 38℃ is numerically and experimentally evaluated as 1.4Hz of motion frequency.

  75. F113 振動する突起付き垂直板の自然対流熱伝達促進(自然対流1)

    佐藤 鉄哉, 円山 重直, 小宮 敦樹

    熱工学コンファレンス講演論文集 2006 193-194 2006年11月23日

    出版者・発行元:一般社団法人日本機械学会

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    The purpose of this study is enhancement of natural convective heat transfer from the vertical plate using some baffles and periodic oscillation. Particularly the effects of baffle height and baffle width are investigated by numerical simulation in this paper. The oscillated velocity is almost half flow velocity of vertical flat plate with no oscillation to reduce the effect of forced convection. The results show that spatially and temporally averaged Nusselt number became larger than that of stationary flat plate but smaller than that of oscillatory flat plate. This results show that baffle is not good application for enhancement of heat transfer.

  76. 14.脳冷却による脳機能マッピング(平成17年度東北支部大会抄録)

    武田 洋樹, 円山 重直, 小宮 敦樹, 山家 智之, 中里 信和

    生体医工学 : 日本エム・イー学会誌 44 (2) 319-319 2006年6月10日

    出版者・発行元:社団法人日本生体医工学会

    ISSN:1347-443X

  77. 界面現象と流体不安定性の研究ワーキンググループ活動報告

    松野聡, 依田眞一, 鴨谷康弘, 今石宣之, 河村洋, 西野耕一, 川路正裕, 上野一郎, 小宮敦樹, 大平博昭, 益子岳史

    第22回宇宙利用シンポジウム講演論文集 56-58 2006年1月

  78. 「コンタクトライン近傍流体の動力学」研究班WG活動報告

    上野一郎, 小宮敦樹, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡

    第22回宇宙利用シンポジウム講演論文集 63-64 2006年1月

  79. 永久塩泉による管内自然対流の数値シミュレーション

    円山重直, 佐藤鉄哉, 小宮敦樹, 椿耕太郎

    日本伝熱シンポジウム講演論文集(CD−ROM) 43rd H313 2006年

  80. 液体の拡散現象に及ぼす外力の影響に関する研究

    圓山重直, 小宮敦樹

    MGLABにおける微小重力実験例紹介,株式会社日本無重量総合研究所 4 2006年

  81. 固気液界面(コンタクトライン)近傍の可視化 -ミクロな視点から観る固気液境界線-

    小宮敦樹, 上野一郎, 木村達人

    可視化情報学会誌 25 (98) 175-180 2005年7月

    出版者・発行元:可視化情報学会

    DOI: 10.3154/jvs.25.175  

    ISSN:0916-4731

  82. Experimental Study of Thermocapillary Flow in The Half-Zone Liquid Bridge of Low Prandtl Number Fluid(Marangoni Convection Modeling Research, 2003-2004)

    Matsumoto Satoshi, Hayashida Hitoshi, Komiya Atsuki, Natsui Hidesada, Yoda Shinichi

    宇宙航空研究開発機構研究開発報告 4 112-128 2005年3月

    出版者・発行元:宇宙航空研究開発機構

    ISSN:1349-1113

    詳細を見る 詳細を閉じる

    The experimental study on thermocapillary convection of low Prandtl number fl uid was carried out to understand transition behavior to oscillatory fl ow. The half-zone liquid bridge of molten tin was formed between hot and cold disks in high vacuum chamber (10-5 Pa). The three radiation thermometers were used to measure the free surface temperature at a different azimuthal location at the same time. In addition, the temperature distribution at interface between liquid bridge and cold disk was measured by using very fi ne thermocouples. In order to detect the transition point and to make clear the oscillation mode more precisely, the temperature measurement system was developed.It could be detected that the steady thermocapillary convection changes to oscillatory under certain condition. The observed phenomena of transition processes after the oscillatory onset were revealed by comparing to numerical result done by Imaishi et al.. The effect of aspect ratio (L/r) on critical Marangoni number was investigated. The critical Marangoni number decreases with increasing the aspect number. This behavior agrees with numerical simulation done by Imaishi et al. qualitatively except for region of smaller aspect ration. Since the echo signal from the tracer had the very small bad SN ratio, in order to raise the SN ratio, signal processing technique was examined. Consequently, the noise which originates in the shoe by the subtraction processing technique was removable. And the SN ratio could be improved by the addition processing by repetition measurement, and the SN ratio improved about 3 times by calculation supposing actual measurement. The A/D converter and the system controller were manufactured in the 3D-UV measurement unit.

  83. 酸素/二酸化炭素燃焼法を用いた二酸化炭素回収型高効率発電プラントのシステム検討(オーガナイズドセッション12 CO_2排出抑制技術に関する熱工学)

    円山 重直, 阿部 一幾, 丸田 薫, 小宮 敦樹

    熱工学コンファレンス講演論文集 2004 185-186 2004年11月10日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    O_2/CO_2 combustion technique is suitable for CO_2 capture. A cryogenic air separation using single rectification column was proposed for O_2 production. In the present paper, feasibility study of simplified natural gas combined cycle, NGCC, utilized CO_2 recovery system was deliberated. Power plant consists of three units: ASU (Air Separation Unit), NGCC, and captured-gas compression unit. These units are built on present technologies of conventional plants. Simulation software, HYSYS.Process, was used to simulate and calculate the net thermal efficiency. We have considered two cases; case 1 is 200-300MW output gas turbine, and case 2 is 50MW output gas turbine. As a result, thermal efficiencies achieve 45.4% in case 1 and 43.3% in case 2. In addition, cases have possibilities to increase thermal efficiencies by using of regenerative technique.

  84. 医療応用微小運動素子の精密伝熱制御(オーガナイズドセッション13 バイオシステムにおける熱・物質移動)

    円山 重直, 邵 龍, 小宮 敦樹

    熱工学コンファレンス講演論文集 2004 391-392 2004年11月10日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    In order to make a catheter to be used in welfare and medical field, a novel whit-kinematics catheter made with shape memory alloy has been developed. This catheter responses reliably and has high accuracy in position control, Transient analysis of temperature and stress has been performed using a finite element method. At the same time, the temperature change is calculated to predict the action of the catheter and the parameters used in PID control. The numerical analysis and experimental result are compared. The performance of the catheter is accurately controlled according to the feedback of the temperature and electronic resistance.

  85. 固液気境界線(コンタクトライン)近傍流体のダイナミクス

    上野一郎, 木村達人, 小宮敦樹

    日本マイクログラビティ応用学会誌 21 (4) 307-311 2004年8月

  86. Transition Phenomena on Marangoni Convection in Low Pr Number Liquid Bridge

    MATSUMOTO Satoshi, HAYASHIDA Hitoshi, YODA Shinichi, KOMIYA Atsuki, NATSUI Hidesada, IMAISHI Nobuyuki

    Thermal science and engineering 12 (4) 21-22 2004年7月1日

    ISSN:0918-9963

  87. Status of the Project Research in the NASDA Microgravity Science Program

    Atsuki Komiya, Shinichi Yoda

    Proceedings of the 42nd AIAA Aerospace Sciences Meeting & Exhibit 2004年1月

    出版者・発行元:AIAA

  88. B233 液柱マランゴニ対流振動流遷移のモデル化

    小宮 敦樹, 松本 聡, 依田 真一

    熱工学コンファレンス講演論文集 2003 385-386 2003年11月10日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    This paper describes a novel model of transition mechanism from steady to oscillatory thermocapillary flow in liquid bridge configuration. The velocity distribution on free surface of high Prandtl number (Pr) fluid is mainly considered in this transition model. In order to evaluate the model, two-dimensional calculations with the wide range of liquid bridge size have been done. The thermophysical properties of Pr=67 fluid (5cSt Silicone oil) are used for the calculations. The results indicate that the velocity distribution on free surface is affected by the difference of inner flow pattern, which depends on the liquid bridge size. This result finally derives a novel parameter which indicates the transition phenomena with wide range Pr number fluids.

  89. B234 低プラントル数流体の液柱マランゴニ振動流遷移過程

    松本 聡, 小宮 敦樹, 林田 均, 夏井 秀定, 安廣 祥一, 今石 宣之

    熱工学コンファレンス講演論文集 2003 387-388 2003年11月10日

    出版者・発行元:一般社団法人日本機械学会

    詳細を見る 詳細を閉じる

    The experimental study on thermocapillary convection of low Prandtl number fluid was carried out to investigate the transition behavior to oscillatory flow. The half-zone liquid bridge of molten tin was used as a test fluid. It can be detected that the steady thermocapillary convection changes to oscillatory under certain condition. In addition to experimental work, a numerical study was also performed to understand the experimentally observed temperature fluctuations. It could be experimentally detected that a slow oscillation (&acd;0.02Hz) appeared after the onset of oscillatory flow, and then the oscillation became faster (&acd;0.3Hz) when the temperature difference ΔT increased. The numerical simulation which traced the experimental temperature history for boundary conditions could explain the experimental result very well.

  90. 低プラントル数流体のマランゴニ対流流れ場可視化技術の開発

    林田 均, 松本 聡, 小宮 敦樹, 夏井 秀定, 依田 真一

    可視化情報学会誌. Suppl. = Journal of the Visualization Society of Japan 23 (2) 169-170 2003年10月15日

    ISSN:0916-4731

  91. シリコーンオイルの表面張力および動粘性係数に関する検討

    小宮 敦樹, 松本 聡, 林田 均, 依田 真一, 福山 誠二郎

    JASMA : Journal of the Japan Society of Microgravity Application 19 16-16 2002年10月17日

    ISSN:0915-3616

  92. Pr=0.01流体のマランゴニ対流実験研究(5) : 温度測定による振動流遷移過程の検討

    林田 均, 夏井 秀定, 松本 聡, 小宮 敦樹, 依田 真一

    JASMA : Journal of the Japan Society of Microgravity Application 19 62-62 2002年10月17日

    ISSN:0915-3616

  93. Pr=0.01流体のマランゴニ対流実験研究(6) : 超音波による溶融金属内部流れ計測用トレーサー粒子の開発

    夏井 秀定, 小宮 敦樹, 上薗 剛, 尾前 宏, 袖山 研一, 福室 直樹, 松本 聡, 林田 均, 依田 真一

    JASMA : Journal of the Japan Society of Microgravity Application 19 63-63 2002年10月17日

    ISSN:0915-3616

  94. 微小重力環境における物質拡散係数の短時間計測

    小宮 敦樹, 円山 重直, 大野 健太郎, 森 健太郎

    JASMA : Journal of the Japan Society of Microgravity Application 18 53-53 2001年10月1日

    ISSN:0915-3616

  95. 日本伝熱学会奨励賞を受賞して

    小宮 敦樹

    伝熱研究 = News of HTSJ 40 (163) 9-9 2001年7月1日

    ISSN:0910-7851

  96. 臨界流体中の温度伝搬と対流不安定性 (その2) - 落下実験 -

    吉原 正一, 石井 孝治, 大西 充, 比江島 俊彦, 東 久雄, 小宮 敦樹, 圓山 重直

    JASMA : Journal of the Japan Society of Microgravity Application 17 142-143 2000年10月1日

    ISSN:0915-3616

  97. 微小重力下での臨界点近傍流体(CO_2 )の熱拡散層測定

    山本 英明, 比江島 俊彦, 東 久雄, 吉原 正一, 石井 孝治, 大西 充, 小宮 敦樹, 圓山 重直

    JASMA : Journal of the Japan Society of Microgravity Application 17 57-57 2000年10月1日

    ISSN:0915-3616

  98. 位相シフト干渉計を用いた微小非定常拡散場の短時間計測

    円山重直, 小宮敦樹, 塚本勝男

    日本伝熱シンポジウム講演論文集 37th (Vol.3) 917-918 2000年

  99. 相境界の物性とミクロな物質移動に関する研究

    S.Maruyama, K.Takahashi, A.Komiya, M.Behnia

    平成9年度~平成11年度北海道大学低温科学研究所共同研究(一般研究)成果報告書 92-99 2000年

  100. 微小非定常拡散セルを用いた物質拡散係数の短時間測定

    円山重直, 小宮敦樹, 酒井清吾

    The 21st Japan symposium 2000 78-80 2000年

  101. Short-Time Mesurement of Mass Diffusion Coefficients Using Small Transient Diffusion Cell

    円山重直, 小宮敦樹, 酒井清吾

    The 21st Japan symposium 2000 78-80 2000年

  102. 微小重力下における溶液中の結晶成長速度の測定

    円山重直, 矢花純, 鷲見直香, 小宮敦樹, 塚本勝男, 清水健司, 岡田繁信, 藤嶋基

    日本機械学会東北支部総会・講演会講演論文集 33rd 161-162 1998年2月

  103. 位相シフト干渉計とスライド式セルを用いた物質拡散係数の測定

    円山重直, 小宮敦樹, 矢花純, 塚本勝男

    日本伝熱シンポジウム講演論文集 35th (Vol.1) 271-272 1998年

  104. 微小重力環境下における結晶成長速度と拡散場

    円山 重直, 小宮 敦樹, 岡田 繁信, 矢花 純, 塚本 勝男, 藤嶋 基, 鷲見 直香, 清水 健司

    JASMA : Journal of the Japan Society of Microgravity Application 14 49-50 1997年10月1日

    ISSN:0915-3616

︎全件表示 ︎最初の5件までを表示

書籍等出版物 4

  1. 高度物理刺激と生体応答

    小宮敦樹

    養賢堂 2017年8月

  2. 機械の研究

    部分執筆

    養賢堂 2015年8月

  3. ナノ・マイクロスケール熱物性ハンドブック

    小宮敦樹

    養賢堂 2014年5月

  4. インクジェット技術における微小液滴の吐出・衝突・乾燥

    小宮敦樹

    技術情報協会 2009年8月

講演・口頭発表等 382

  1. Precursor film dynamics of small droplet -Visualization and accurate measurement- 招待有り

    Atsuki Komiya

    Annual Chinese Heat and Mass Transfer Conference 2022 2022年12月18日

  2. Scaling Up Thermodiffusive Separation through a Microchannel

    Shuqi Xu, Atsuki Komiya, Ben Corry, Juan F. Torres

    23rd Australasian Fluid Mechanics Conference (23AFMC) 2022年12月8日

  3. Edge formation of small droplet on a substrate –Nano-scale visualization of precursor film dynamics – 招待有り

    Atsuki Komiya

    The 1st World Conference on Multiphase Transportation, Conversion & Utilization of Energy (MTCUE) 2022年7月30日

  4. Turbulence statistics in a temporally evolving turbulent natural convection boundary layer

    Junhao Ke, Nicholas Williamson, Steven W. Armfield, Atsuki Komiya, Stuart E. Norris

    12th Australasian Heat and Mass Transfer Conference (12AHMTC) 2022年6月30日

  5. Evaluation of Heat Transfer Mechanism in Natural Convection Boundary Layer Perturbated by a Local Mixed Convection Regime

    Takuma Koizumi, Juan F. Torres, Yuki Kanda, Atsuki Komiya

    12th Australasian Heat and Mass Transfer Conference (12AHMTC) 2022年6月30日

  6. Possibility of Mass Diffusion Control - Effect of Pore Size of Separated Membrane - 招待有り

    Atsuki Komiya

    12th Australasian Heat and Mass Transfer Conference (12AHMTC) 2022年6月30日

  7. Evaluation of convective and radiative heat transfer for the therapeutic development using near-infrared laser and gold nanorod

    Akiyoshi Obonai, Yuki Kanda, Oluwatobi Oluwafemi, Tetsuya Kodama, Atsuki Komiya

    The 32nd International Symposium on Transport Phenomena (ISTP32) 2022年3月19日

  8. Experimental evaluation of membrane pore pattern on the protein diffusion

    Ruiyao Zhu, Ryo Watanabe, Yuki Kanda, Juan Felipe Torres Alvarez, Sébastien Livi, Atsuki Komiya

    The 32nd International Symposium on Transport Phenomena (ISTP32) 2022年3月20日

  9. Evaluation of the interaction between neighboring microchannels in boiling heat transfer

    Kazuya Murakami, Yuki Kanda, Atsuki Komiya

    The 32nd International Symposium on Transport Phenomena (ISTP32) 2022年3月20日

  10. Effect of fluid flow on heat transfer in elastocaloric cooling systems

    Xuen Sze Way, Gael Sebald, Yuki Kanda, Atsuki Komiya

    The 32nd International Symposium on Transport Phenomena (ISTP32) 2022年3月20日

  11. Control of Protein Mass transfer Using a Membrane with Patterned Pores 招待有り

    Atsuki Komiya

    The 32nd International Symposium on Transport Phenomena (ISTP32) 2022年3月20日

  12. Evaluation of the possibility to control mass diffusion process by a membrane with macropore patterning 招待有り

    Atsuki Komiya

    The 26th National and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC2021) 2021年12月18日

  13. Accurate visualization of carbon dioxide heat transfer under supercritical condition using high-speed phase-shifting interferometer

    Yuki Kanda, Haruki Ito, Atsuki Komiya

    Second Asian Conference on Thermal Sciences (2nd ACTS) 2021年10月4日

  14. Preliminary Measurements of CO2 Cavity Convection from Sub-Critical to Supercritical Conditions Using Pixelated Phase-Shifting Interferometry

    Qixian Wu, Lin Chen, Yizhi Zhang, Atsuki Komiya

    Second Asian Conference on Thermal Sciences (2nd ACTS) 2021年10月5日

  15. Development of a novel measurement system of total emissivity using the GHP method

    Mitsuomi Soma, Yuki Kanda, Atsuki Komiya

    Second Asian Conference on Thermal Sciences (2nd ACTS) 2021年10月6日

  16. グラフェン上における液体流動発電の出力密度定量

    栗谷京生, 落合耕太朗, Golap Kalita, 種村眞幸, 小宮敦樹, 菊川豪太, 小原拓, 山下一郎, Fumio S. Ohuchi, Meyya Meyyappan, 寒川誠二, 鷲尾勝由, 岡田健

    応用物理学会第75回東北支部学術講演会 2020年12月4日

  17. Stability and Transition to Turbulence of Taylor Vortex in a Gap between Rotating Two Cones

    Takahiro Adachi, Widiast Toshiharu, Kana Akinaga, Atsuki Komiya

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月29日

  18. Effect of Micropores Patterning in Separated Plate on Protein Hindered Diffusion Phenomena

    Atsuki Komiya, Ryo Watanabe, Yuki Kanda, Juan Felipe Torres Alvarez, Sébastien Livi

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月29日

  19. Numerical Simulation of Mass Transfer and Structural Change with Solid-gas Reaction in a Full-scale Porous Model

    Yui Numazawa, Yoshiya Matsukawa, Yohsuke Matsushita, Hideyuki Aoki, Atsuki Komiya

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  20. Quantitative Visualization of Flow Bifurcation in Laminar Rayleigh-Bénard Convection with Combined PSI and PIV

    Shuqi Xu, Yongling Zhao, Atsuki Komiya, Juan Felipe Torres Alvarez

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  21. A Study on Nano-scale Interfacial Phenomena of Surface-modified Nanoparticle Suspension

    Masaki Kubo, Toshiki Otsuka, Eita Shoji, Takao Tsukada, Atsuki Komiya

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  22. Integral Modelling of an Unsteady Natural Convection Boundary Layer

    Junhao Ke, Nicholas Williamson, Steven W. Armfield, Atsuki Komiya

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  23. Experimental Evaluation of Objective Function for Perdition of IR Camera's Sensitivity

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  24. Science of Ultrafine Drop and High Speed Impact

    Takehiko Sato, Masao Watanabe, Takeru Yano, Yuka Iga, Kazumichi Kobayashi, Toshiyuki Hayase, Jun Ishimoto, Makoto Ohta, Atsuki Komiya, Hidemasa Takana, Kiyonobu Ohtani, Junnosuke Okajima, Satoshi Uehara, Suguru Miyauchi, Hitomi Anzai

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  25. Nano-scale Observation of Precursor Film Dynamic by Phase-shifting Ellipsometer

    Shinya Okazawa, Nie Qinxue, Yuki Kanda, Atsuki Komiya

    17th International Conference on Flow Dynamics (ICFD2020) 2020年10月29日

  26. High Spatio-Temporal Visualization of Heat and Mass Transfer Phenomena During Gas Hydrate Decomposition

    Yuki Kanda, Atsuki Komiya

    17th International Conference on Flow Dynamics (ICFD2020) 2020年10月29日

  27. Lattice Boltzmann Simulation of Convection and Heat transfer in a Square Side-Heated Cavity Filled with Supercritical CO2

    Yongchang Feng, Lin Chen, Yuki Kanda, Atsuki Komiya

    17th International Conference on Flow Dynamics (ICFD2020) 2020年10月29日

  28. Numerical Study of Passive Thermal Control for Uniform Temperature Field of Supercritical Fluid

    Haruki Ito, Yuki Kanda, Atsuki Komiya

    17th International Conference on Flow Dynamics (ICFD2020) 2020年10月29日

  29. Development of Spinning Device Using Filmwise Pumping-up Mechanism with Induction Heating and Rotating Cone

    Kenji Takahashi, Takahiro Adachi, Takeshi Akinaga, Kana Akinaga, Junnosuke Okajima, Atsuki Komiya

    20th International Symposium on Advanced Fluid Information (AFI-2020) 2020年10月28日

  30. Investigation of Convective Boiling Phenomena in Layered-parallel Microchannels

    Yusuke Nishimura, Yuki Kanda, Junnosuke Okajima, Atsuki Komiya

    31st International Symposium on Transport Phenomena (ISTP-31) 2020年10月14日

  31. 衝突噴流による高 Rayleigh数自然対流の温度境界層制御

    小笠原直人, 神田雄貴, J.F. Torres, 小宮敦樹

    機械学会熱工学コンファレンス2020 2020年10月11日

  32. マイクロ細孔を利用したタンパク質の物質拡散制御の可能性評価

    渡邉崚, J.F. Torres, 神田雄貴, 小宮敦樹

    機械学会熱工学コンファレンス2020 2020年10月10日

  33. 三成分系の拡散におけるStefan-Maxwell式とCorrection velocityを用いた近似式の比較

    沼澤結, 松川嘉也, 松下洋介, 青木秀之, 小宮敦樹

    化学工学会第51回秋季大会 2020年9月24日

  34. 位相シフトエリプソメータを用いた揮発性液滴の固気液界面における先行液膜の動的挙動計測

    Qinxue Nie, 神田雄貴, 小宮敦樹

    第20回日本伝熱学会東北支部学生発表会 2020年5月16日

  35. マランゴニ対流場での二酸化炭素吸収過程の濃度場・流動場計測

    伊藤春輝, 神田雄貴, 小宮敦樹

    第20回日本伝熱学会東北支部学生発表会 2020年5月16日

  36. Visualization of transient heat transfer in the vicinity of solid-gas interface

    Yuki Kanda, Atsuki Komiya

    ELyT Workshop 2020 2020年2月18日

  37. Visualization of Precursor Film Dynamics of Small Droplet by Phase-Shifting Ellipsometer 招待有り

    Atsuki Komiya

    日中伝熱シンポジウム 2020年1月10日

  38. Evaluation of the relations between hindered diffusion process of protein and membrane structure

    Atsuki Komiya, Ryo Watanabe, Hani Alkitabi Aldaftari, Shuichi Moriya, Sébastien Livi

    The Second Pacific Rim Thermal Engineering Conference (PRTEC2019) 2019年12月14日

  39. Application of an Integral Model to an Unsteady Natural Convection Boundary Layer

    Junhao Ke, Nicholas Williamson, Steven W. Armfield, Stuart E. Norris, Atsuki Komiya

    11th Australasian Natural Convection Workshop 2019年12月9日

  40. 高精度GHPによる多孔質断熱材の等価ふく射熱伝導率の測定

    郭福会, 小柳秀太, 古川琢磨, 大澤啓志, 小宮敦樹, 円山重直

    第40回日本熱物性シンポジウム 2019年11月28日

  41. 保護熱板法を用いた全放射率計測における熱損失解析

    小柳秀太, 小宮敦樹, 円山重直

    第40回日本熱物性シンポジウム 2019年11月28日

  42. Precise Measurement of Rapid and Tiny Heat and Mass Transport Phenomena Using High-speed Phase-shifting Interferometry 招待有り

    Atsuki Komiya

    The 2nd International Symposium on Measurement Techjnology in Thermal Science and Engineering 2019年11月16日

  43. Transition to Turbulence of Taylor Vortex in a Gap between Rotating Two Cones

    Takahiro Adachi, Kentaro Usuki, Atsuki Komiya, Daniel Henry, Varely Botton

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  44. Protein Mass Transfer Control by Using Hindered Diffusion in Membrane

    Atsuki Komiya, Ryo Watanabe, Sébastien Livi

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  45. Science of Ultrafine Drop and High Speed Impact

    Takehiko Sato, Masao Watanabe, Takeru Yano, Yuka Iga, Kazumichi Kobayashi, Toshiyuki Hayase, Jun Ishimoto, Makoto Ohta, Atsuki Komiya, Hidemasa Takana, Kiyonobu Ohtani, Junnosuke Okajima, Satoshi Uehara, Suguru Miyauchi, Hitomi Anzai

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  46. A Study on Nano-scale Interfacial Phenomena of Surface-modified Nanoparticle Suspension

    Eita Shoji, Masaki Kubo, Takao Tsukada, Atsuki Komiya, Gota Kikugawa

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  47. Multiphase Flow and Interfacial Transport Phenomena at Phase and Material Boundaries

    Shigeru Obayashi, Seiji Samukawa, Toshiyuki Takagi, Hirofumi Wada, Takeru Okada, Yutaka Watanabe, Mitsuo Hashimoto, Takashi Iijima, Philippe Guy, Lalita Udpa, Yuji Hattori, Hiroki Nagai, Koji Shimoyama, Makoto Hirota, Aiko Yakeno, Gota Kikugawa, Atsuki Komiya, Sho Takeda, Jun Ishimoto, Tetsuya Uchimoto, Hiroyuki Kosukegawa

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  48. Evaluation of Prediction Method for IR Camera's Sensitivity

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  49. Experiment of Light-driven Micromotor with Epicyclic Motion

    Noboru Yamada, Vuong Van Thai, Hiroki Sato, Junnosuke Okajima, Atsuki Komiya

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  50. Large-Scale Simulation of Mass Transfer and Structural Change with Solid-Gas Reaction in Porous Media: Investigation of Diffusion Term

    Yui Numazawa, Yohsuke Matsushita, Hideyuki Aoki, Atsuki Komiya

    19th International Symposium on Advanced Fluid Information 2019年11月7日

  51. Numerical Simulation of Concentration Field around a Growing Crystal Subjected to Gravity

    Hani Alkitabi Aldaftari, Ryo Watanabe, Atsuki Komiya

    16th International Conference on Flow Dynamics 2019年11月7日

  52. Quantitative Evaluation of the Influence of Membrane Structure on Protein Mass Diffusion

    Ryo Watanabe, Shuichi Moriya, Sébastien Livi, Hani Alkitabi Aldaftari, Atsuki Komiya

    16th International Conference on Flow Dynamics 2019年11月7日

  53. Evaluation of Spatiotemporal Bubble Generation accompanying Flow Boiling in Multi-microchannel

    Daiki Sugawara, Shuichi Moriya, Junnosuke Okajima, Atsuki Komiya

    16th International Conference on Flow Dynamics 2019年11月7日

  54. Evaluation of Heat Transfer Performance of a Heat Sink with Microchannels of Different Diameters

    Yusuke Nishimura, Junnosuke Okajima, Takuya Oouchi, Masaru Sasaki, Atsuki Komiya

    16th International Conference on Flow Dynamics 2019年11月8日

  55. 位相シフトエリプソメータを用いた固体基板上における懸濁液の微視的濡れ挙動の計測

    庄司衛太, 米村建哉, 金子峻大, 久保正樹, 塚田隆夫, 小宮敦樹

    日本マイクログラビティ応用学会第31回学術講演会 2019年10月24日

  56. High-.speed Interferometric Measurement of Interfacial Heat Transfer with Arbaa Prism

    Yuki Kanda, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    12th Asian Thermophysical Properties Conference 2019年10月4日

  57. 位相シフトエリプソメータを用いた表面修飾ナノ粒子含有PDMS懸濁液の微視的濡れ挙動の検討

    金子峻大, 米村建哉, 庄司衛太, 久保正樹, 塚田隆夫, 小宮敦樹

    令和元年度化学系学協会東北大会 2019年9月22日

  58. Main key points for developing environmental friendly solid state cooling system based on the elastocaloric effect in rubber

    Gael Sebald, Atsuki Komiya, Jean-Marc Chenal, Laurent Chazeau, Florent Dalmas, Mathieu Vigouroux, François Rousset, M'hamed Boutaous, Jacques Jay, Bertrand Garnier, Mohammad Rammal, Ahmed Ould El Moctar, Hiba Haissoune, Gildas Coativy, Laurence Seveyrat, Kaori Yuse, Laurent Lebrun

    the European Materials Research Society 2019 Fall Meeting 2019年9月18日

  59. ガスふく射効果を応用した自然対流乱流場制御に関する研究

    古川琢磨, 岡島淳之介, 小宮敦樹, 円山重直

    第56回日本伝熱シンポジウム 2019年5月31日

  60. メタンハイドレート界面近傍における非定常熱物質輸送その場計測とメタン解離の律速評価

    神田雄貴, 岡島淳之介, 小宮敦樹, 圓山重直

    第56回日本伝熱シンポジウム 2019年5月29日

  61. 多層マイクロチャネル構造ヒートシンクの伝熱性能評価

    西村祐輔, 岡島淳之介, 大内琢也, 小宮敦樹

    第56回日本伝熱シンポジウム 2019年5月29日

  62. Quantitative Visualization of Thermal Boundary Layer over a Heating or Cooling Flat Plate in Forced Convection

    Jun Liu, Jun Onodera, Junya Washiashi, Ryo Watanabe, Shuichi Moriya, Hideyuki Aizawa, Atsuki Komiya

    15th International Conference on Fluid Control, Measurements and Visualization 2019年5月27日

  63. 透過膜形状がタンパク質物質拡散に及ぼす影響の評価

    渡邉崚, 守谷修一, Sébastien Livi, 小宮敦樹

    第19回日本伝熱学会東北支部学生発表会 2019年5月11日

  64. 位相シフトエリプソメータによる固体基板上液滴のナノスケール濡れ挙動の可視化計測

    庄司衛太, 米村建哉, 金子峻大, 久保正樹, 塚田隆夫, 小宮敦樹

    化学工学会第84年会 2019年3月15日

  65. Measurement of protein mass flux through porous membrane

    Ryo Watanabe, Shuichi Moriya, Sébastien Livi, Atsuki Komiya

    ELyT Workshop 2019 2019年3月9日

  66. Quantitative measurement of interfacial heat and mass transfer using high-speed phase-shifting interferometer

    Yuki Kanda, Junnosuke Okajima, Atsuki Komiya

    ELyT Workshop 2019 2019年3月11日

  67. A Study on Flow Characteristics of Suspensions of Surface-modified Nanoparticles Using Numerical Simulations 国際会議

    Shin Usune, Masaki Kubo, Eita Shoji, Atsuki Komiya, Takao Tsukada

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  68. Interferometric Measurement of Temperature Fields in Turbulent Flows 国際会議

    Juan Felipe Torres Alvarez, Atsuki Komiya, John Pye, Wojciech Lipinski

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  69. Mechanism of Propagation of Underwater Negative Streamer 国際会議

    Ryo Kumagai, Seiji Kanazawa, Kiyonobu Ohtani, Atsuki Komiya, Toshiro Kaneko, Tomoki Nakajima, Takehiko Sato

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  70. Development of Accurate Temperature Method by Infrared Camera 国際会議

    Takuma Kogawa, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  71. Development of Light-driven Microactuators for Microfluidic Devices 国際会議

    Noboru Yamada, Vuong Van Thai, Junnosuke Okajima, Atsuki Komiya

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  72. Experimental Validation of Natural Convection Flow in a Cavity with Time-varying Thermal Boundary Conditions 国際会議

    Linjing Zhou, Steven Armfield, Nicholas Williamson, Michael Kirkpatrick, Wenxian Lin, Atsuki Komiya, Takuma Kogawa

    18th International Symposium on Advanced Fluid Information (AFI-2018) 2018年11月7日

  73. Thermo-fluid Dynamics Design of a Double Pipe Heat Exchanger 国際会議

    Tomohiro Hirano, Mitsuo Yoshimura, Koji Shimoyama, Atsuki Komiya

    15th International Conference on Flow Dynamics (ICFD2018) 2018年11月7日

  74. Precise Measurement of CO2 Absorption Process into Alkanolamine at Gas-Liquid Interface 国際会議

    Atsuki Komiya, Toru Saito

    29th International Symposium on Transport Phenomena (ISTP-29) 2018年10月30日

  75. Precise Measurement Technique of Skin Temperature for Presymptomatic Diagnosis 国際会議

    Atsuki Komiya, Takahiro Okabe

    SA-Japan Bilateral Symposium 2018 2018年10月22日

  76. 積層造形に適した熱交換器の形状最適化

    平野智大, 吉村光生, 下山幸治, 小宮敦樹

    日本機械学会2018年度年次大会 2018年9月9日

  77. Experimental Study of Natural Convection in a Cavity: Precise Visualization Method of Temperature Field 国際会議

    Menghua Duan, Lin Chen, Yongchang Feng, Junnosuke Okajima, Atsuki Komiya

    16th International Heat Transfer Conference (IHTC-16) 2018年8月10日

  78. Numerical Study of the Effect of Over/Underburden Permeability on Methane Hydrate Dissociation by Depressurization 国際会議

    Yongchang Feng, Lin Chen, Hikaru Yamada, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    16th International Heat Transfer Conference (IHTC-16) 2018年8月10日

  79. Visualization of Heat and Mass Transfer Near the Formation and Dissociation Interface of CO2 Hydrate with High?Speed Phase?Shifting Interferometer 国際会議

    Yuki Kanda, Eita Shoji, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    16th International Heat Transfer Conference (IHTC-16) 2018年8月10日

  80. Dynamic Free Surface Deformation of High-Prandtl- Number Liquid Bridge with Marangoni Convection in Mcrogravity 国際会議

    Taishi Yano, Koichi Nishino, Satoshi Matsumoto, Ichiro Ueno, Atsuki Komiya, Yasuhiro Kamotani

    42nd COSPAR Scientific Assembly 2018 2018年7月14日

  81. Radiative Control Through Greenhouse Covering Materials Using Pigmented

    Hani Alkitabi Aldaftari, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    第55回日本伝熱シンポジウム 2018年5月29日

  82. メタンハイドレート堆積物のガス生産挙動における初期温度の影響評価

    山田光, Yongchang Feng, Lin Chen, 岡島淳之介, 小宮敦樹, 円山重直

    第55回日本伝熱シンポジウム 2018年5月29日

  83. Numerical analysis of depressurization-induced gas production from oceanic methane hydrate reservoirs in the Eastern Nankai Trough

    Yongchang Feng, Lin Chen, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    第55回日本伝熱シンポジウム 2018年5月29日

  84. Formation process of fine bubbles by plasma in water 国際会議

    Takehiko Sato, Ryo Kumagai, Takashi Miyahara, Masanobu Oizumi, Tatsuyuki Nakatani, Shiroh Ochiai, Takamichi Miyazaki, Hidemasa Fujita, Seiji Kanazawa, Kiyonobu Ohtani, Atsuki Komiya, Toshiro Kaneko, Tomoki Nakajima, Marc Tinguely, Mohamed Farhat

    3rd International symposium on Application of High-voltage, Plasma & Micro/Nano Bubble (Fine Bubble) to Agriculture and Aquaculture 2018年5月9日

  85. Experimental Study on Active Control of Protein Mass Flux by Functional Membrane 国際会議

    Atsuki Komiya, Sebastien Livi

    ELyT Workshop 2018 2018年3月6日

  86. Evaluation of the boundary layer of the turbulent natural convection in square cavity with radiation effect 国際会議

    9th Australasian Natural Convection Workshop 2015年12月14日

  87. Initiation and Propagation Processes of Underwater Streamers 国際会議

    Joint Symposium of the 9th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT-9) and the 28th Symposium on Plasma Science for Materials (SPSM-28) 2015年12月13日

  88. Evaluation of power generation system utilizing ocean methane hydrate and chemical carbon capture and storage system 国際会議

    International Conference on Power Engineering-15(ICOPE-15) 2015年12月3日

  89. 凝固点降下を利用したメタンハイドレート模擬試料の浸透率制御, Control of permeability of methane hydrate mimicking sample by changing the freezing point

    第7 回メタンハイドレート総合シンポジウム(CSMH-7) 2015年12月3日

  90. 固気界面でのメタンハイドレート解離現象における濃度場の可視化計測, Visualization of concentration field of methane hydrate dissociation in the vicinity of solid-gas surface

    第7回メタンハイドレート総合シンポジウム(CSMH-7) 2015年12月2日

  91. Trial of Optical Experiment for Precise Visualization of Protein Diffusion Field and Its Evaluation 国際会議

    2015年中国工程熱物理学会伝熱伝質学術会議 2015年11月1日

  92. Evaluation of Several Dependencies of Protein Diffusion Coefficients by Precise Visualization of Diffusion Field 国際会議

    Twelfth International Conference on Flow Dynamcs (ICFD2015) 2015年10月29日

  93. Combined Application of Photo-thermal Therapy and Water-cooling System for Treatment of Tumor-bearing Lymph Nodes 国際会議

    12th International Conference on Flow Dynamics 2015年10月28日

  94. Coupled Photon and Bioheat Transport Simulation for Laser Induced Photothermal Therapy 国際会議

    12th International Conference on Flow Dynamics 2015年10月28日

  95. Development of Thermistor Probe utilizing Guard Heater for Precise Measurement of Skin Surface Temperature 国際会議

    12th International Conference 2015年10月28日

  96. Effect of Electric Fields on the Inception of Primary and Secondary Streamers in Water 国際会議

    12th International Conference on Flow Dynamics (ICFD-2015), OS17: IFS Collaborative Research Forum (AFI-2015) 2015年10月28日

  97. Measurement of Permeability Inside a Methane Hydrate Mimicking Porous Media 国際会議

    12th International Conference on Flow Dynamics 2015年10月28日

  98. Study on Energy Transport by Radiation and Convection in Large Scale Environment 国際会議

    The 15th International Symposium on Advanced Fluid Information (AFI2015) 2015年10月28日

  99. 高熱流束ヒートシンク実現のためのマイクロ超音速ノズル形状の評価

    日本機械学会熱工学コンファレンス2015 2015年10月25日

  100. 保護熱源を有するサーミスタプローブを用いた加熱材料の高精度・非破壊熱伝導率計測

    第36回日本熱物性シンポジウム 2015年10月21日

  101. Evaluation of radiation effect to the heat and fluid flow characteristics in the turbulent natural convection of square 国際会議

    The 26th International Symposium on Transport Phenomena 2015年9月30日

  102. Simultaneous measurement of concentration and flow fields in CO2 absorption process 国際会議

    The 26th International Symposium on Transport Phenomena 2015年9月29日

  103. Visualization of Concentration Boundary Layer in the Vicinity of Methane Hydrate Dissociation 国際会議

    China-Japan Joint Workshop on Flow Dynamics and Transport Phenomena 2015年6月24日

  104. 模擬メタンハイドレート貯留層内の相変化流動現象可視化計測に関する研究

    第52回伝熱シンポジウム 2015年6月5日

  105. ふく射要素法を用いたキャビティ内の三次元自然対流ーふく射連成伝熱解析(REM2)

    第52回伝熱シンポジウム 2015年6月4日

  106. 位相シフトエリプソメータによる液滴先行薄膜のナノ計測

    第52回伝熱シンポジウム 2015年6月4日

  107. 非対称縮小拡大ノズルを有するマイクロチャネル内超音速流を用いた高熱流束ヒートシンクの冷却性能の検討

    第52回伝熱シンポジウム 2015年6月4日

  108. 気液界面におけるメタンハイドレートの生成および解離の濃度場計測

    第52回伝熱シンポジウム 2015年6月3日

  109. 高精度温度プローブによる皮膚がんの早期発見手法の検討

    第52回伝熱シンポジウム 2015年6月3日

  110. Performance Evaluation About Low CO2 Emission Power Generation System Utilizing Ocean Methane Hydrate 国際会議

    ASME-ATI-UIT 2015 Conference on Thermal Energy Systems: Production, Storage, Utilization and the Environment 2015年5月

  111. ナノプラズマ制御技術の創成と局所照射による生体機能制御~水中ストリーマ放電の開始・進展機構~

    平成26年度第4回新学術領域研究「プラズマ医療科学の創成」全体会議 2015年3月22日

  112. 位相シフト干渉計によるメタンハイドレート解離現象の可視化測定

    日本機械学会東北支部第50期総会・講演会 2015年3月

  113. Development of a Precise Measurement System of Radiative Heat Transfer between Parallel Plates Separated by Close Distances 国際会議

    2015 ELyT lab Workshop 2015年2月20日

  114. Mass Transfer In Porous Media For An Energy System Utilizing Methane Hydrate 国際会議

    2015 ELyT lab Workshop 2015年2月20日

  115. 大気圧水中放電の形成機構とバイオ応用

    東北大学電気通信研究所共同プロジェクト研究会 仙台“プラズマフォーラム” 2015年2月20日

  116. Mass Transfer Control of Protein by Hindered Diffusion Process 国際会議

    2015 Annual ELyT Workshop 2015年2月

  117. Nanosecond time-resolved imaging of underwater secondary streamer and the synchronized discharge current (水中二次ストリーマのナノ秒時間分解画像と同期放電電流) 国際会議

    第24回日本MRS年次大会 2014年12月11日

  118. メタンハイドレートを利用した二酸化炭素低排出発電システムの提案と性能評価解析

    第6回メタンハイドレート総合シンポジウム 2014年12月4日

  119. メタンハイドレート貯留層を模擬した多孔質体内気液二相流の観察

    第6回メタンハイドレート総合シンポジウム 2014年12月3日

  120. 界面でのメタンハイドレート解離現象の可視化測定

    第6回メタンハイドレート総合シンポジウム 2014年12月3日

  121. 自己加熱サーミスタ法を用いた温熱治療時の皮膚の有効熱伝導率測定

    第35回日本熱物性シンポジウム 2014年11月24日

  122. 高精度熱伝導率測定のためのペルチェモジュールを用いた保護熱板法における二 次元軸対称熱伝導解析

    第35回日本熱物性シンポジウム 2014年11月22日

  123. 一定温度加熱による腹部の生体伝熱特性の変化

    日本機械学会 熱工学コンファレンス 2014年11月9日

  124. MEASUREMENT OF DENSITY FIELD OF SUPERSONIC FLOW INSIDE A MICRO-CHANNEL BY PHASE SHIFTING INTERFEROMETER 国際会議

    The 25th International Symposium on Transport Phenomena 2014年11月6日

  125. NUMERICAL INVESTIGATION ON THERMAL AND HYDRODYNAMICAL BEHAVIOR OF EXPANDING SINGLE BUBBLE IN MICROCHANNEL 国際会議

    The 25th International Symposium on Transport Phenomena 2014年11月6日

  126. ストリークカメラを用いた水中ストリーマの高時間分解解析

    日本機械学会第92期流体工学部門講演会 (JSME FED 2014) 2014年10月26日

  127. 液滴前方に存在する先行薄膜の光学的二次元可視化計測

    機械学会第6回マイクロ・ナノ工学シンポジウム 2014年10月22日

  128. Calculation of Turbulent Characteristic of Natural Convection in Parallel Heated Plates at High Rayleigh Number by Large Eddy Simulation 国際会議

    11th International Conference on Flow Dynamics 2014年10月9日

  129. Instability Analysis of Natural Convection in Closed Cavity Configuration 国際会議

    11th International Conference on Flow Dynamics 2014年10月9日

  130. Propagation Processes of Primary and Secondary Streamers by Pulsed Discharge in Water 国際会議

    11th International Conference on Flow Dynamics (ICFD2014), CS4: IFS Collaborative Research Forum (AFI2014) 2014年10月9日

  131. Reduction of Radiative Heat Transfer between Two Metallic Plates due to Interferences 国際会議

    11th International Conference on Flow Dynamics 2014年10月9日

  132. Short Time and 2D Thickness Measurement by Phase-shifting Techinique and Ellipsometry 国際会議

    11th International Conference on Flow Dynamics 2014年10月9日

  133. Theoretical and Experimental Studies of Local Heating of Biological Tissue for Laser Therapy 国際会議

    11th International Conference on Flow Dynamics 2014年10月9日

  134. Density Measurement of Supersonic Air Flow inside a Bumped Micro-channel Using Interferometer 国際会議

    11th International Conference on Flow Dynamics 2014年10月8日

  135. Dynamics of Liquid Film during Phase Change in a Microchannel 国際会議

    11th InternationalConference on Flow Dynamics 2014年10月8日

  136. Evaluation on Endothermic Effect of Dissociation in Methane Hydrate Reservoir 国際会議

    11th International Conference on Flow Dynamics 2014年10月8日

  137. Preliminary evaluation of multiphase flow in artificial sand sediment for gas production from methane hydrate reservoir 国際会議

    11th International Conference on Flow Dynamics 2014年10月8日

  138. Preliminary Study of Self-heated Thermistor Probe for Non-invasive Medical Diagnosis 国際会議

    11th International Conference on Flow Dynamics 2014年10月8日

  139. 水中正ストリーマの進展開始電圧に及ぼす放電パラメータの影響

    2014年度第38回静電気学会全国大会 2014年9月8日

  140. マイクロチャネル内相変化伝熱による気泡膨張挙動の数値解析

    日本機械学会東北支部第50期秋季講演会 2014年9月5日

  141. DEVELOPMENT OF SELF-HEATED THERMISTOR PROBE FOR NON-INVASIVE MEASUREMENT OF EFFECTIVE THERMAL CONDUCTIVITY OF HUMAN TISSUE 国際会議

    20th European Conference on Thermophysical Proerties (ECTP) 2014年9月3日

  142. THERMAL CONDUCTIVITY MEASUREMENT OF METHANE HYDRATE SEDIMENT UNDER HIGH PRESSURE CONDITION 国際会議

    20th European Conference on Thermophysical Proerties (ECTP) 2014年9月3日

  143. TEMPERATURE DEPENDENCE MEASUREMENT OF THERMAL CONDUCTIVITY BY GHP METHOD WITH PELTIER MODULE FOR VACUUM INSULATION PANEL 国際会議

    20th European Conference on Thermophysical Proerties (ECTP) 2014年9月1日

  144. ESTIMATION OF BLOOD PERFUSION RATE AND ITS TEMPERATURE DEPENDENCY IN HUMAN ABDOMINAL AREA UNDER HEATING CONDITION 国際会議

    the 15th International Heat Transfer Conference (IHTC-15) 2014年8月

  145. REDUCING THERMAL RADIATION BETWEEN PARALLEL PLATES IN THE FAR-TO-NEAR FIELD TRANSITION REGIME 国際会議

    the 15th International Heat Transfer Conference (IHTC-15) 2014年8月

  146. Quantitative and High-speed Measurement of Temperature Field by Phase-shifting Interferometer 国際会議

    The 16th International Symposium on Flow Visualization (ISFV16) 2014年6月25日

  147. Role of continuous discharge current for secondary streamer in water 国際会議

    International Symposium on Electrohydrodynamics (ISEHD 2014) 2014年6月24日

  148. Radiative heat transfer between two semi-infinte parallel plates at the far-to-near field transition regime 国際会議

    2nd International Workshop on Nano-Micro Thermal Radiation: Energy, Manufacturing, Materials, and Sensing 2014年6月9日

  149. New Approach to Optimizing Pigmented Coatings for Ultraviolet Barrier and Blue Light Protection 国際会議

    2nd International Workshop on Nano-Micro Thermal Radiation 2014年6月8日

  150. 束縛拡散によるタンパク質 物質移動制御の可能性に関する研究

    第14回日本伝熱学会東北支部学生発表会 2014年5月10日

  151. LESを用いた鉛直加熱平行平板間の乱流自然対流伝熱特性及び乱流構造の評価

    第51回日本伝熱シンポジウム 2014年5月

  152. ナノ粒子制御による紫外線遮蔽膜と青色光保護膜の開発及び最適化

    第51回日本伝熱シンポジウム 2014年5月

  153. ペルチェモジュールを用いた保護熱板法による真空断熱パネルの熱伝導率温度依存性測定

    第51回日本伝熱シンポジウム 2014年5月

  154. 近接場遷移距離領域における半無限平板間のふく射伝熱

    第51回日本伝熱シンポジウム 2014年5月

  155. 高速位相シフト干渉計の開発と加熱細線周りの非定常熱伝導の高精度可視化計測

    第51回日本伝熱シンポジウム 2014年5月

  156. 高熱流束ヒートシンクのための超音速マイクロチャネル内流れの密度場計測

    第51回日本伝熱シンポジウム 2014年5月

  157. Dynamics of convection in tilted cavities 国際会議

    2014 ELyT lab Workshop 2014年2月20日

  158. Interference effects in thermal radiation exchanged between two closely-spaced flat bodies 国際会議

    2014 ELyT lab Workshop 2014年2月20日

  159. Quantitative Evaluation of Proteins Hindered Diffusion 国際会議

    2014 Annual ELyT Workshop 2014年2月20日

  160. 水中プラズマのストリーマ進展過程

    電気学会 プラズマ・パルスパワー合同研究会 2012年12月11日

  161. Visualization and Measurement of Laminar Natural Convection in Square Enclosure 国際会議

    The Third International Forum on Heat Transfer(IFHT2012) 2012年11月14日

  162. Experimental Trial to Active Control of Protein Mass Flux in Hindered Diffusion Field 国際会議

    23rd International Symposium on Transport Phenomena 2012年11月

  163. Temperature Distribution Measurement in Natural Convection around Vertical Heated Flat Plate by Using Inverse Abel Transform and Phase-Shifting Interferometer 国際会議

    23rd International Symposium on Transport Phenomena 2012年11月

  164. サブマ イクロ粒子を用いた波長選択膜のふく射特性

    The 33rd Japan Symposium on Thermophysical Properties(JSTP) 2012年10月

  165. GPSラジオゾンデを用いた 大気放射フラックスの気球観測

    The 33rd Japan Symposium on Thermophysical Properties(JSTP) 2012年10月

  166. Propagation Process of Streamer Discharge in Water 国際会議

    9th International Conference on Flow Dynamics 2012年9月21日

  167. Development of Visualization Methods of Streamers in Water 国際会議

    12th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration (AFI/TFI-2012) 2012年9月20日

  168. 水中ストリーマの極微小時空間計測

    第36回静電気学会全国大会 2012年9月13日

  169. 加熱条件下の熱流束測定による生体組織の血液かん流率の推定

    日本機械学会2012年次大会 (金沢) 2012年9月9日

  170. Estimation of Heat Conduction and Thermal Radiation in Porous Insulation Materials Using Diffuse Approximation 国際会議

    Ninth International Conference on Flow Dynamics 2012年9月

  171. Estimation of Thermal Conductivity of Biological Tissue by Inverse Analysis 国際会議

    Ninth International Conference on Flow Dynamics 2012年9月

  172. Evaluation and Analysis of Atmospheric Radiative Energy Transfer 国際会議

    the Twelfth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2012年9月

  173. Experimentally and Numerically Investigations for Light and Heat Transport inside Biological Tissues 国際会議

    The Twelfth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2012年9月

  174. Instability of Rayleigh-Benard Convection: Comparison Between Experimental and Numerical Approaches 国際会議

    the Twelfth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2012年9月

  175. Design of Interferometer System with Phase-shifting Koester Prism 国際会議

    Ninth International Conference on Flow Dynamics 2012年9月

  176. Effect of Supersonic Micro Nozzle Shaple on the Heat Transfer in a Surface Wall 国際会議

    Ninth International Conference on Flow Dynamics 2012年9月

  177. Measurement of Radiative Properties of Controlled-Films 国際会議

    The Twelfth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2012年9月

  178. 水中プラズマのストリーマ形成過程

    第22回環境工学総合シンポジウム2012 2012年7月6日

  179. Mearsurement of Soret Coefficients in Binary Solutions by Phase-Shifting Interferometry 国際会議

    10th International Meeting on Thermodiffusion 2012年6月

  180. Active Mass Transfer Control in Diffusion Field by Smart Materials 国際会議

    ELyT lab Workshop 2012 2012年3月

  181. Experimental Trial to Active Control of Mass Transfer in Complex System

    Heat Transfer Society of Japan FY2012 Young Researcher Workshop 2012年2月

  182. 拡散近似を用いた高温多孔質断熱材におけるふく射伝熱評価

    The 32nd Japan Symposium on Thermophysical Properties 2011年11月21日

  183. 点接触式熱物性測定法と逆問題解析を用いた軟質材料及び液体の熱物性評価

    The 32nd Japan Symposium on Thermophysical Properties 2011年11月21日

  184. Analysis of Axisymmetric Radiative Heat Transfer in Biological Tissue using the Radiation Element Method 国際会議

    Eighth International Conference on Flow Dynamics(ICFD) 2011年11月9日

  185. Energy Transfer Simulation and Analysis on Mega-scale Environment 国際会議

    The Eleventh International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration AFI/TFI 2011 2011年11月9日

  186. Evaluation of Radiative Properties of Cr2O3:Fe2O3 Pigment Powder in Solar Spectrum Range using Experimental Diffuse Reflectivity Measurement 国際会議

    Eighth International Conference on Flow Dynamics(ICFD) 2011年11月9日

  187. Heat Transfer Analysis in a Biological Tissue Exposed o Laser Irradiation 国際会議

    The Eleventh International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration AFI/TFI 2011 2011年11月9日

  188. Potential for Ocean Fertilization by Perpetual Salt Fountain:Each Basin Estimation of Upwelling Flow Rate 国際会議

    Eighth International Conference on Flow Dynamics(ICFD) 2011年11月9日

  189. The Effect of Dispersed State to Control of Radiative Properties of Coatings Pigmented with Nanoparticles 国際会議

    Eighth International Conference on Flow Dynamics(ICFD) 2011年11月9日

  190. Visualization and Measurement of Natural Convection around Vertical Flat Plate by Common Path Phase-Shifting Interferometer 国際会議

    22nd International Symposium on Transport Phenomena 2011年11月

  191. 光学干渉計による物質拡散場および温度境界層の高精度可視化

    日本機械学会熱工学コンファレンス2011 2011年10月

  192. THEORETICAL STUDY FOR HIGH HEAT FLUX COOLONG BY USING PHASE CHANGE HEAT TRANSFER IN A MICROCHIANNEL 国際会議

    the 4th International Conference on Heat Transfer and Fluid Flow in Microscale 2011年9月4日

  193. 冷媒循環システムを利用した極細クライオプローブによる凍結領域制御

    日本機械学会2011年度年次大会 2011年9月

  194. VISUALIZATION OF FLOW PATTERNS IN DIFFERENTLY SHAPED COOLING CHANNELS OF PISTONS 国際会議

    PSFVIP-8:The 8th Pacific Symposium on Flow Visualization and Image 2011年8月21日

  195. Formation and Dissociation of Oceanic Methane Hydrate For a Low CO2 Emission Power Generation System 国際会議

    ASME 2011 Power Conference (POWER2011) 2011年7月12日

  196. Evaluation of the Concentration Dependency of Mass Diffusion Coefficients in Aqueous Binary Solutions 国際会議

    7th International Conference on Diffusion in Solids and Liquids 2011年6月

  197. Heat shield performance of Fe2O3 Pigmented coatings by inverse analysis of full spectral reflectivity measurements

    48th national heat Transfer Symposium of Japan (2011.6.1-3) 2011年6月

  198. 高熱流速冷却マイクロチャネル内相変化伝熱の理論解析

    第48回日本伝熱シンポジウム講演論文集(2011.6.1-3) 2011年6月

  199. 高分子化合物の水溶液内物質拡散係数の濃度依存性測定

    第48回日本伝熱シンポジウム講演論文集(2011.6.1-3) 2011年6月

  200. ピストン冷却チャネル内の流動様相の可視化-チャネルの形状の影響-

    第11回日本伝熱学会学生発表会 2011年5月

  201. Control of Radiative Properties of Coatings Pigmented with Fe2O3 Nanoparticles 国際会議

    AJTEC2011 ASME-JSME 8th Thermal Engineering Joint Conference 2011年3月

  202. 「界面現象と流体不安定性研究」研究班WG活動報告2010

    松本聡, 石塚博弥, Ranganathan Narayanan・Farzam Zoueshtiagh, 鴨谷康弘

    第27回宇宙利用シンポジウム 2011年1月24日

  203. 「界面熱流体システムにおける熱物資輸送現象とその制御」研究班WG活動報告

    上野一郎, 木村達人, 塩見淳一郎, 丸山茂夫, 松本聡, 益子岳史

    第27回宇宙利用シンポジウム 2011年1月24日

  204. 微小重力下における極低温流体の挙動解明実験実施の検討

    Sangkwon Jeong, Yunghwan Byun, 円山重直

    第27回宇宙利用シンポジウム 2011年1月24日

  205. レーザー治療における生体組織内の光伝播・熱伝導連成解析

    円山重直, 佐藤善幸, 櫻井篤

    第23回バイオエンジニアリング講演会 2011年1月8日

  206. 「界面熱流体システムにおける熱物資輸送現象とその制御」研究班WG活動報告

    第27回宇宙利用シンポジウム 2011年1月

  207. レーザー治療における生体組織内の光伝播・熱伝導連成解析

    第23回バイオエンジニアリング講演会 2011年1月

  208. 微小重力下における極低温流体の挙動解明実験実施の検討

    第27回宇宙利用シンポジウム 2011年1月

  209. 点接触式熱物性測定法を利用した軟質材量及び液体の熱物性測

    眞下央, 岡島淳之介, 高橋一郎, 円山重直

    第31回日本熱物性シンポジウム 2010年11月17日

  210. Effect of Eddy Diffusivity on the Upwelling Flow Rate of Perpetual Salt Fountain 国際会議

    Mikihito Watanabe, Takashi Yabuki, Shigenao Maruyama

    The 21st International Symposium on Transport Phenomena 2010年11月2日

  211. Oceanic Productivity Enhanced by Perpetual Salt Fountain during Ocean Experiments – Estimation based on Remote Sensing and Numerical Simulation - 国際会議

    Takashi Yabuki, Shigenao Maruyama, Mikihito Watanabe

    The Seventh International Conference on Flow Dynamics 2010年11月1日

  212. The Effect of Capillary Tube on Cooling Performance of Ultrafine Cryoprobe 国際会議

    Junnosuke Okajima, Shiganao Maruyama

    The Seventh International Conference on Flow Dynamics 2010年11月1日

  213. Numerical Study of a Transitional Natural Ventilation Flow Driven by a Line Source Plime with Varied Reynolds Number and Prandtl Number 国際会議

    Tae Hattori, Steven W. Armfield, Michael P. Kirkpatrick, Shigenao Maruyama

    The Seventh International Conference on Flow Dynamics 2010年11月1日

  214. Spectral Radiative Properties of a Polymer Coating Containing Nano-Micro Bubbles 国際会議

    Mehdi Baneshi, Shigenao Maruyama

    The Seventh International Conference on Flow Dynamics 2010年11月1日

  215. Numerical Study of Natural Convection Taking Into Account Radiation between Walls 国際会議

    Khosro Lari, Mehdi Baneshi, Shigenao Maruyama

    The Seventh International Conference on Flow Dynamics 2010年11月1日

  216. Diatoms, Diffusion and Membranes 国際会議

    Gary Rosengarten

    The Tenth International Symposimu on Advanced Fluid Information and Transdisciplinary Fluid Integration 2010年11月1日

  217. On Location of a Load in a Radiant Furnace for Uniform Thermal Conditions Using REM2 and Micro-Genetic Algorithm 国際会議

    Ramchandra P. Chopade, Subhash C. Mishra, P. Mahanta, Shigenao Maruyama

    The Tenth International Symposimu on Advanced Fluid Information and Transdisciplinary Fluid Integration 2010年11月1日

  218. Energy Transfer Simulation and Analysis on Mega-Scale Environment 国際会議

    Noboru Yamada, Atsushi Sakurai, Shigenao Maruyama

    The Tenth International Symposimu on Advanced Fluid Information and Transdisciplinary Fluid Integration 2010年11月1日

  219. Measurement of the Concentration Dependency of Mass Diffusion Coefficients in Aqueous Binary Solutions by Phase-Shifting Interferometer 国際会議

    Juan Felipe Torres Alvarez, Junnosuke Okajima, Shigenao Maruyama

    The Ninth Asian Thermophysical Properties Conference 2010年10月19日

  220. ピストンクーリングチャネル内流動の可視化

    守谷修一, 小針達也, 小坂誠二, 仲野是克, 円山重直

    自動車技術会学術講演会2010年秋季大会 2010年9月29日

  221. An Investigation of Concentration Dependency of Mass Diffusion Coefficients in Multi-Component Diffusion 国際会議

    Juan Felipe Torres Alvarez, Junnosuke Okajima, Shuichi Moriya, Shigenao Maruyama, Masud Behnia

    The 14th International Heat Transfer Conference 2010年8月9日

  222. Cooling Characteristics of Ultrafine Cryoprobe Utilizing Convective Boiling Heat Transfer in Microchannel 国際会議

    Junnosuke Okajima, Shigenao Maruyama, Hiroki Takeda, Sangkwon Jeong

    The 14th International Heat Transfer Conference 2010年8月9日

  223. Numerical Study of 3D Nonlinear Disturbance Growth in Transitional Natural Convection 国際会議

    Tilek Aberra, Steven W. Armfield, Masud Behnia, Shigenao Maruyama

    The 14th International Heat Transfer Conference 2010年8月9日

  224. Evaluation of the Effect of Gravity Force on Transient Mass Diffusion Fields 国際会議

    Shigenao Maruyama

    The 38th Committee on Space Research (COSPAR10) 2010年7月18日

  225. Aesthetic and Thermal Performances of Black Cupric Oxide and Titanium Dioxide Nano-Paarticlate Coatings 国際会議

    Mehdi Baneshi, Shigenao Maruyama

    The 6th International Symposium on Radiative Transfer 2010年6月13日

  226. 皮膚凍結手術における組織致死温度の測定と評価

    武田洋樹, 岡島淳之介, 相場節也, 円山重直

    第47回日本伝熱シンポジウム 2010年5月23日

  227. 極細クライオプローブ内における冷媒の沸騰伝熱過程の解析

    岡島淳之介, 武田洋樹, Sangkwon Jeong, 円山重直

    第47回日本伝熱シンポジウム 2010年5月23日

  228. ナノ粒子散布による地球温暖化防止策の提案と粒子の最適化

    円山重直, 長山岳史

    第47回日本伝熱シンポジウム 2010年5月23日

  229. The effect of copper and copper oxide pigment particles on aesthetic and thermal characteristics of pigmented coating

    Mehdi Baneshi, Shigenao Maruyama

    第47回日本伝熱シンポジウム 2010年5月23日

  230. 高精度腹部温熱制御機器による温熱治療の評価

    眞下央, 円山重直, 関隆志, 山家智之

    第10回日本伝熱学会学生発表会 2010年5月7日

  231. 位相シフト干渉計を用いた自然対流場の温度分布測定

    庄司衛太, 円山重直

    第10回日本伝熱学会学生発表会 2010年5月7日

  232. TiO2ナノ粒子群機能膜のふく射特性に関する研究

    江目宏樹, Mehdi BANESHI, 小宮敦樹, 円山重直

    日本機械学会東北支部 第45期総会・講演会 2010年3月12日

  233. 海洋実験及び海洋観測データによる永久塩泉の可能性

    渡邉幹仁, 矢吹崇, 小宮敦樹, 円山重直

    日本機械学会東北支部 第45期総会・講演会 2010年3月12日

  234. Thermal Therapy by the Abdominal Heater Utilizing Heat Transfer Control Technique 国際会議

    Shigenao Maruyama, Hiroshi Mashimo, Atsuki Komiya, Takashi Seki, Tomoyuki Yambe

    The 15th International Congress of Oriental Medicine 2010年2月26日

  235. 温熱治療における携帯腹部温熱制御機器の開発と評価

    眞下央, 円山重直, 小宮敦樹, 関隆志, 山家智之

    第13回日本統合医療学会 2009年11月21日

  236. A Proposal of Low CO2 Emission Power Generation System Utilizing Oceanic Methane Hydrate 国際会議

    S. Maruyama, M. Chisaki, A. Komiya, R. Shirakashi

    International Conference on Power Engineering-09 2009年11月16日

  237. Experimental Trial to Determine Mass Diffusion Coefficients in Multi-component System 国際会議

    A. Komiya, J. F. Torres, J. Okajima, S. Maruyama

    7th Pacific Symposium on Flow Visualization and Image Processing 2009年11月16日

  238. ナノ粒子散布による地球冷却の可能性

    円山重直, 長山岳史, 小宮敦樹

    日本機械学会熱工学コンファレンス2009 2009年11月7日

  239. Energy Transfer Simulation and Analysis on Mega-scale Environment 国際会議

    N. Yamada, A. Sakurai, A. Komiya, S. Maruyama

    The Ninth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2009年11月4日

  240. In Situ Observation and Remote Sensing during Ocean Experiments of Perpetual Salt Fountain 国際会議

    T. Yabuki, S. Maruyama, M. Watanabe, A. Komiya

    The Ninth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration 2009年11月4日

  241. The Investigation into the Effect of Using Different Nano-micro Metallic Powders on Sunlight Reflectivity of Pigmented Coatings 国際会議

    M. Baneshi, S. Maruyama, A. Komiya

    Sixth International Conference on Flow Dynamics 2009年11月4日

  242. Measurement of Thermophysical Properties of Freezing Skin Using Peltier Modules for Cryosurgery 国際会議

    H. Takeda, D. Fingas, J. Okajima, A. Komiya, S. Maruyama

    Sixth International Conference on Flow Dynamics 2009年11月4日

  243. Visualization of Absorption Process of Carbon Dioxide into Alkanolamine Solutions at Gas-liquid Surface 国際会議

    A. Komiya, K. Maruta, Y. Nakano, H. Nakamura

    Sixth International Conference on Flow Dynamics 2009年11月4日

  244. ナノ粒子群を用いた機能膜のふく射特性

    江目宏樹, Mehdi Baneshi, 円山重直, 小宮敦樹

    第30回日本熱物性シンポジウム講演論文集 2009年10月28日

  245. 位相シフト干渉計を用いた多成分系非定常拡散場の計測と逆問題解析による物質拡散係数および濃度比の導出

    Juan F. Torres, 小宮敦樹, 岡島淳之介, 円山重直

    第30回日本熱物性シンポジウム講演論文集 2009年10月28日

  246. Precise and Rapid Cooling of Skin Tissue for Cryosurgery Utilizing Peltier Effect in Extremely Low Temperature 国際会議

    H. Takeda, J. Okajima, S. Aiba, A. Komiya, S.C. Mishra, S. Maruyama

    The 7th World Conference on Experimental Heat Transfer 2009年6月28日

  247. Boiling Heat Transfer in Small Channel for Development of Ultrafine Cryoprobe 国際会議

    J. Okajima, S. Maruyama, A. Komiya

    The 7th World Conference on Experimental Heat Transfer 2009年6月28日

  248. Measurement of Mass Diffusion Coefficient of Multi-Component Systems in Aqueous Media by Phase Shifting Interferometer 国際会議

    A. Komiya, J. F. Torres, J. Okajima, S. Maruyama

    The 5th International Conference on Diffusion in Solids and Liquids 2009年6月24日

  249. Comparison of Spectral Radiative Properties of Different Titanium Dioxide Powders in Absorbing Host Medium

    Mehdi Baneshi, Shigenao Maruyama, Atsuki Komiya

    The 46th National Heat Transfer Symposium of Japan 2009年6月2日

  250. 生体組織を用いたペルチェクライオプローブによる高精度凍結手術の研究

    武田洋樹, 相場節也, 小宮敦樹, 円山重直

    第46回日本伝熱シンポジウム 2009年6月2日

  251. 極細クライオプローブ開発のための沸騰伝熱基礎実験

    岡島淳之介, 円山重直, 小宮敦樹

    第46回日本伝熱シンポジウム 2009年6月2日

  252. 波長選択性を有したナノ粒子群機能膜のふく射特性に関する研究

    江目宏樹, 円山重直, Mehdi Baneshi, 小宮敦樹

    第9回日本伝熱学会学生発表会 2009年5月8日

  253. 位相シフト干渉計を用いた三成分系非定常拡散場の計測と逆問題による物質拡散係数の導出

    Juan F. Torres, 小宮敦樹, 円山重直

    第9回日本伝熱学会学生発表会 2009年5月8日

  254. 逆問題解析によるタンパク質物質拡散係数導出法と広域緩衝液の影響

    日本熱物性学会 「マイクロ・ナノスケールの熱物性とシステムデザイン」 2009年4月27日

  255. 逆問題解析による物質拡散係数導出法とタンパク質拡散現象に及ぼす広域緩衝液の影響

    新潟大学VBL特別講演会 2009年3月24日

  256. 温度制御された黒体炉とふく射伝熱解析による放射温度計の高精度計測

    小笠原直也, 円山重直, 小宮敦樹

    日本機械学会東北支部第44期総会・講演会 2009年3月13日

  257. 海洋深層水汲み上げのための係留パイプ系の設計-流線型パイプの導入-

    矢吹崇, 知崎正純, 小宮敦樹, 円山重直

    日本機械学会東北支部第44期総会・講演会 2009年3月13日

  258. 多成分系拡散場の高精度計測と宇宙環境の利用

    小宮敦樹, Juan F. Torres, 円山重直, 岡島淳之介

    日本航空宇宙学会北部支部2009年講演会、第10回再使用型宇宙推進系シンポジウム 2009年3月11日

  259. Heat-transfer Control of Biological Tissue Utilizing Non-equilibrium Thermo-electric Device for Precise Cryosurgery

    S. Maruyama, H. Takeda, A. Komiya

    The 35 th Annual Meeting of the Japan Society for Low Temperature Medicine 2008年11月22日

  260. Simple yet Precise Calibration Method of Thermometers for Measuring the Temperature of Biological Tissue 国際会議

    N. Ogasawara, S. Maruyama, A. Komiya, H. Takeda, T. Seki, T. Yambe

    Fifth International Conference on Flow Dynamics 2008年11月17日

  261. Determination Method of Concentration Dependency of Mass Diffusion Coefficient by Phase Shifting Interferometer and Inverse Method 国際会議

    J. Okajima, A. Komiya, S. Maruyama

    Fifth International Conference on Flow Dynamics 2008年11月17日

  262. Evaluation of the Peltier Cryoprobe Availability through Animal Experiments 国際会議

    H. Takeda, S. Aiba, J. Okajima, A. Komiya, S. Maruyama

    Fifth International Conference on Flow Dynamics 2008年11月17日

  263. Laminar Plane Free-fountains in a Homogeneous Fluid 国際会議

    N. Srinarayana, A. Komiya, S. Armfield, M. Behnia, S. Maruyama

    Fifth International Conference on Flow Dynamics 2008年11月17日

  264. Comparison between Optimized Iron Oxide and Titanium Dioxide Pigmented Coatings both Thermally and Aesthetically 国際会議

    M. Baneshi, S. Maruyama, A. Komiya

    Fifth International Conference on Flow Dynamics 2008年11月17日

  265. 微小重力環境下での非定常拡散場高精度計測

    円山重直, 小宮敦樹

    日本航空宇宙学会西部支部講演会 2008年11月14日

  266. The Effect of Particle Size Distribution on Performance of a Pigmented Coating Considering both Thermal and Aesthetic Effects 国際会議

    M. Baneshi, S. Maruyama, A. Komiya

    The Seventh JSME-KSME Thermal and Fluids Engineering Conference 2008年10月13日

  267. 位相シフト干渉計を用いた濃度計測と逆問題解析による物質拡散係数の導出

    岡島淳之介, 小宮敦樹, 円山重直

    第29回日本熱物性シンポジウム 2008年10月8日

  268. A Comparison for Diffusion Process of Artificial Upwelling of Nutrient-rich Seawater Simulation by κ-ε Model and Large Eddy Simulation 国際会議

    M. Chisaki, S. Maruyama, M. Perrette, A. Komiya, T. Yabuki

    The Second International Forum on Heat Transfer 2008年9月17日

  269. Development of Precise Heat Transfer Control Devices for Thermal Therapy 国際会議

    S. Takashima, N. Ogasawara, S. Maruyama, A. Komiya, T. Seki, T. Yambe

    The Second International Forum on Heat Transfer 2008年9月17日

  270. Estimation of Concentration Dependency of Mass Diffusion Coefficient by Conjugate Gradient Method 国際会議

    A. Komiya, J. Okajima, S. Maruyama, S. Moriya

    18th European Conference on Thermophyhsical Properties 2008年8月31日

  271. Precise Control of Cooling and Heating Rate Utilizing Peltier Cryoprobe for Cryosurgery 国際会議

    Hiroki Takeda, Shigenao Maruyama, Junnosuke Okajima, Setsuya Aiba, Atsuki Komiya

    19th International Symposium on Transport Phenomena 2008年8月17日

  272. Visualization of Upwelled Saline Flow and Its Transition Behaviour from Steady to Oscillatory Regimes 国際会議

    Atsuki Komiya, Nicholas Williamson, Nari Srinarayana, Masud Behnia, Steven Armfield, Shigenao Maruyama

    19th International Symposium on Transport Phenomena 2008年8月17日

  273. Optimization of Pigmented Coating Considering Thermal and Aesthetic Effects: Comparison between Some Common White Pigments

    M.Baneshi, S.Maruyama, A. Komiya

    Proceedings of Mechanical Engineering Congress, 2008 Japan(MECJ-08) 2008年8月

  274. Possibility of Micro-cryosurgery Utilizing Cooling Needle 国際会議

    J. Okajima, A. Komiya, H. Takeda, S. Maruyama

    Proceedings of the XVIth International Conference on Mechanics in Medicine and Biology 2008年7月

  275. Visualization of Transient Concentration Field in Process of Carbon Dioxide Absorption at Gas-liquid Surface 国際会議

    A. Komiya, K. Maruta, Y. Nakano, T. Hashida

    Proceedings of International Symposium on Flow Visualization 2008年7月

  276. 温熱療法に向けたふく射加熱装置の伝熱制御による性能評価

    小笠原直也, 圓山重直, 高島茂, 小宮敦樹, 関隆志, 山家智之

    第8回日本伝熱学会東北支部学生発表会講演論文集 2008年5月

  277. 微小凍結手術用冷却針による生体組織凍結現象の解析

    岡島淳之介, 武田洋樹, 小宮敦樹, 圓山重直

    第45回日本伝熱シンポジウム講演論文集 2008年5月

  278. 永久塩泉による管内湧昇量の予測法の提案

    佐藤鉄哉, 知崎正純, 小宮敦樹, 圓山重直

    第45回日本伝熱シンポジウム講演論文集 2008年5月

  279. ペルチェクライオプローブを用いた伝熱制御および凍結領域の制御に関する研究

    武田洋樹, 圓山重直, 岡島淳之介, 小宮敦樹, 相場節也

    第45回日本伝熱シンポジウム講演論文集 2008年5月

  280. ふく射加熱装置を用いた熱流束制御による温熱療法への応用

    小笠原直也, 圓山重直, 高島茂, 小宮敦樹, 関隆志, 山家智之

    第45回日本伝熱シンポジウム講演論文集 2008年5月

  281. Development of Precise-temperature- controlled Cooling Apparatus for Medical Application by Using Peltier Effect 国際会議

    S. Maruyama, A. Komiya, H. Takeda

    Proceedings of 2008 International Conference on BioMedical Engineering and Informatics 2008年5月

  282. 逆問題解析による濃度依存性を考慮した物質拡散係数導出法の検討

    岡島淳之介, 小宮敦樹, 圓山重直

    日本機械学会東北支部第43期総会・講演会講演論文集 2008年3月

  283. 腹部温熱制御機器を用いた温熱療法の伝熱制御

    高島茂, 圓山重直, 小宮敦樹, 小笠原直也, 関隆志, 山家智之

    日本機械学会東北支部第43期総会・講演会講演論文集 2008年3月

  284. Precise Temperature Control and Heat Flux Measurement of the Radiation Heater for Thermal Therapy 国際会議

    Naoya Ogasawara, Shigenao Maruyama, Shigeru Takashima, Atsuki Komiya, Takashi Seki, Tomoyuki Yambe

    The Seventh International Symposium on Advanced Fluid Information and The Fourth International Symposium on Transdisciplinary Fluid Integration 2007年12月14日

  285. Numerical Simulation of Upwelling Flow in Pipe Generated by Perpetual Salt Fountain 国際会議

    Tetsuya Sato, Shigenao Maruyama, Atsuki Komiya, Koutaro Tsubaki

    16th Australasian Fluid Mechanics Conference 2007年12月3日

  286. 炭素ガス吸収過程における気-液界面近傍濃度場の不安定性

    小宮敦樹, 丸田薫, 仲野是克, 橋田俊之

    日本機械学会熱工学コンファレンス 2007年11月

  287. ペルチェクライオプローブによる凍結手術の能動伝熱制御に関する研究

    武田洋樹, 圓山重直, 相場節也, 小宮敦樹, 高島茂

    日本伝熱学会東北支部平成19年度秋季伝熱セミナー 2007年10月

  288. 共役勾配法による濃度依存性を考慮した物質拡散係数の導出

    小宮敦樹, 岡島淳之助, 圓山重直

    第28回日本熱物性シンポジウム 2007年10月

  289. Evaluation of the Relation between Frozen Regions and Heat Transfer Coefficient of Cooling Needle 国際会議

    J. Okajima, S. Maruyama, A. Komiya

    Fourth International Conference on Flow Dynamics 2007年9月

  290. Comparison of Phase Function of Small Particles and Bubbles by Ray Tracing and Mie Theory 国際会議

    M. Baneshi, S. Maruyama, A. Komiya

    Fourth International Conference on Flow Dynamics 2007年9月

  291. Measurement of Heat Flux Emitted by Radiation Heater for Thermal Therapy 国際会議

    N. Ogasawara, S. Takashima, S. Maruyama, A. Komiya, T. Seki, T. Yambe

    Fourth International Conference on Flow Dynamics 2007年9月

  292. Prediction of Frozen Region by Numerical Simulation During Cryosurgery Utilizing Peltier Cryoprobe 国際会議

    H. Takeda, S. Maruyama, S. Aiba, A. Komiya

    Fourth International Conference on Flow Dynamics 2007年9月

  293. Spatial-high-resolution Measurement of Diffusion Field for Evaluation of Concentration Dependency of Diffusion Coefficient 国際会議

    A. Komiya, S. Maruyama, S. Moriya

    The 8th Asian Thermophysical Properties Conference 2007年8月

  294. Phonon Transport Simulation for Nano/micro Scale Heat Conduction 国際会議

    A. Sakura, S. Maruyama, K. Miyazaki, A. Komiya

    The 8th Asian Thermophysical Properties Conference 2007年8月

  295. 溶液中への炭酸ガス吸収過程における表面近傍対流の影響

    小宮敦樹, 丸田薫, 仲野是克, 橋田俊之

    日本流体力学会年会2007 2007年8月

  296. Development of Precise Visualization System for Small Transient Diffusion Field of Protein Using Phase Shifting Interferometer 国際会議

    A. Komiya, S. Maruyama, S. Moriya

    ASME-JSME Thermal Engineering and ASME Summer Heat Transfer Conference 2007年7月

  297. Precise Control of Frozen Region During Cryosurgery Utilizing Peltier Effect 国際会議

    H. Takeda, S. Maruyama, S. Aibe, A. Komiya

    ASME-JSME Themal Engineering and ASME Summer Heat Transfer Conference 2007年7月

  298. Three-Dimensional Nongray Radiateve Heat Transfer In Conjunction With Turbulent Natural Convection Using Dorem And LES 国際会議

    A. Sakurai, S. Maruyama, M. Behnia, A. Komiya, T. Kawabe

    Fifth International Symposium on Radiative Transfer 2007年6月17日

  299. 腹部温熱制御機器による生体内非定常温度分布の数値解析

    高島茂, 圓山重直, 武田洋樹, 岡島淳之助, 小宮敦樹, 関隆志, 山家智之

    第7回日本伝熱学会東北支部学生発表会 2007年5月

  300. 腹部温熱制御機器を用いた生体内伝熱に関する研究

    圓山重直, 高島茂, 武田洋樹, 岡島淳之助, 小宮敦樹, 関隆志, 山家智之

    第44回日本伝熱シンポジウム 2007年5月

  301. 拡散係数測定による溶液中への CO2 吸収メカニズムに関する研究

    鈴木孝啓, 小宮敦樹, 丸田薫, 仲野是克, 橋田俊之

    第44回日本伝熱シンポジウム 2007年5月

  302. フォノン放射輸送方程式を用いたナノ・マイクロスケール熱伝導シミュレーション

    櫻井篤, 圓山重直, 宮崎康次, 小宮敦樹

    第44回日本伝熱シンポジウム 2007年5月

  303. Analytical Study of Temperature Distribution in Biological Tissue 国際会議

    J. Okajima, S. Maruyama, A. Komiya

    The 15th International Conference on Mechanics in Medicine and Biology 2006年12月

  304. 振動する突起付き垂直板からの自然対流熱伝達促進

    佐藤鉄哉, 円山重直, 小宮敦樹

    日本機械学会熱工学コンファレンス2006 2006年11月

  305. 細線形状記憶合金を利用した人工筋肉の繰返し動作評価

    伊吹竜太, 円山重直, 小宮敦樹, 山家智之

    日本機械学会熱工学コンファレンス2006 2006年11月

  306. Micro-Scale Heat Transport Modeling Using Equation of Phonon Radiative Transfer 国際会議

    A. Sakurai, S. Maruyama, K. Miyazaki, A. Komiya

    Third International Conference on Flow Dynamics 2006年11月

  307. Solution of Bio-heat Transfer Equation during Thermal Therapies 国際会議

    J. Okajima, S. Maruyama, A. Komiya

    Third International Conference on Flow Dynamics 2006年11月

  308. Evaluation of 1-D Discrete Ordinates Radiation Element Method for Radiative Heat Transfer in Anisotropic Scattering Media 国際会議

    H. Nakai, S. Maruyama, A. Sakurai, A. Komiya

    Third International Conference on Flow Dynamics 2006年11月

  309. Natural Convective Heat Transfer from Vertical Baffled Plate with Oscillation 国際会議

    T. Sato, S. Maruyama, A. Komiya

    Third International Conference on Flow Dynamics 2006年11月

  310. Inactivation of Brain Function Utilizing Rapid Cooling Probe Applied to Brain Mapping 国際会議

    H. Takeda, S. Maruyama, A. Komiya, T. Yambe, N. Nakasato

    Third International Conference on Flow Dynamics 2006年11月

  311. タンパク質拡散現象に及ぼす広域緩衝液の影響評価

    小宮敦樹, 円山重直, 守谷修一

    第27回日本熱物性シンポジウム 2006年10月

  312. Brain Mapping Method Utilizing Rapid Cooling Probe 国際会議

    S. Maruyama, H. Takeda, A. Komiya, T. Yambe, N. Nakasato

    The 17th International Symposium on Transport Phenomena 2006年9月

  313. Conjugate Simulation of Nongray Radiative Heat Transfer and Natural Convection in a Participating Media Using DOREM, REM2, and LES 国際会議

    A. Sakurai, S. Maruyama, M. Behnia, A. Komiya, S. Sakai

    International Symposium on Turbulence, Heat and Mass Transfer 5 2006年9月

  314. Design of Plate-type Actuator Using SMA Wire for Assistant Artificial Heart Muscle 国際会議

    R. Ibuki, S. Maruyama, A. Komiya, T. Yambe

    Proceedings of International Joint Conference of INABIO/SMEBA 2006 2006年9月

  315. Measurement of Mass Diffusion Coefficient of Micro Quantity Proteins Using Phase Shifting Interferometer 国際会議

    A. Komiya, S. Maruyama, S. Moriya

    The 13th International Heat Transfer Conference 2006年8月

  316. Theoretical analysis of critical Marangoni number for oscillatory flows with high Prandtl number fluids 国際会議

    S. Yoda, S. Matsumoto, A. Komiya

    COSPAR 2006年7月

  317. 三次元ふく射伝熱解析のための離散方位ふく射要素法(DOREM)の提案

    櫻井篤, 円山重直, 小宮敦樹

    第43回日本伝熱シンポジウム 2006年6月

  318. 非定常拡散場の局所計測による物質拡散係数の濃度依存性評価

    小宮敦樹, 円山重直, 守谷修一

    第43回日本伝熱シンポジウム 2006年6月

  319. ペルチェ効果を用いた能動伝熱制御による凍結手術用装置

    武田洋樹, 円山重直, 相場節也, 小宮敦樹

    第43回日本伝熱シンポジウム 2006年6月

  320. 多分散水滴群のふく射伝熱における単分散近似手法の評価

    中居裕貴, 円山重直, 櫻井篤, 小宮敦樹

    第43回日本伝熱シンポジウム 2006年6月

  321. 永久塩泉による管内自然対流の数値シミュレーション

    円山重直, 佐藤鉄哉, 小宮敦樹, 椿耕太郎

    第43回日本伝熱シンポジウム 2006年6月

  322. 微小生体組織の凍結領域制御に関する研究

    岡島淳之介, 円山重直, 小宮敦樹

    第6回日本伝熱学会東北支部学生発表会 2006年5月

  323. Natural Convection and Radiative Heat Transfer of an Enclosure Containing a Participating Medium Using REM2 and LES 国際会議

    A. Sakurai, M. Behnia, S. Maruyama, A. Komiya, S. Sakai

    Eurotherm78 – Computational Thermal Radiation in Participating Media II 2006年4月

  324. Precise Heat Transfer Control for Medical Application Using Peltier Effect 国際会議

    S. Maruyama, A. Komiya, R. Ibuki, K. Nakagawa, H. Takeda

    Fifth International Symposium on Advanced Fluid Information -IFS-JAXA Joint Symposium- AFI-2005 2005年12月

  325. 改良型位相シフト干渉計を用いたタンパク質物質拡散係数の測定

    小宮敦樹, 円山重直, 守谷修一

    第26回日本熱物性シンポジウム 2005年11月

  326. 水粒子の散乱吸収特性データベースの構築

    円山重直, 中居裕貴, 小宮敦樹

    第26回日本熱物性シンポジウム 2005年11月

  327. Combined Heat Transfer of Convection and Radiation Using LES and REM2 国際会議

    A. Sakurai, M. Behnia, S. Maruyama, A. Komiya, S. Sakai

    Second International Conference on Flow Dynamics 2005年11月

  328. Development of a Simple Structured Artificial Muscle Using SMA Wire 国際会議

    R. Ibuki, S. Maruyama, A. Komiya

    Second International Conference on Flow Dynamics 2005年11月

  329. 熱電素子を用いたマイクロクライオプローブ

    中川和人, 円山重直, 小宮敦樹

    第39回日本生体医工学会東北支部大会 2005年10月

  330. 脳冷却による脳機能マッピング

    武田洋樹, 円山重直, 小宮敦樹, 山家智之, 中里信和

    第39回日本生体医工学会東北支部大会 2005年10月

  331. Development of an Optical Visualization System for Small Transient Diffusion Fields 国際会議

    A. Komiya, S. Maruyama

    5th Pacific Symposium on Flow Visualization and Image Processing 2005年9月26日

  332. In-Situ Measurement of Small Diffusion Field Using Phase- Shifting Interferometer 国際会議

    S. Maruyama, A. Komiya

    5th Pacific Symposium on Flow Visualization and Image Processing 2005年9月26日

  333. 熱電運動素子を用いた人工筋肉の拍動動作性能評価

    伊吹竜太, 円山重直, 小宮敦樹

    第42回日本伝熱シンポジウム 2005年6月

  334. 脳機能検診用冷却装置の開発

    円山重直, 武田洋樹, 小宮敦樹, 山家智之, 中里信和

    第42回日本伝熱シンポジウム 2005年6月

  335. 微細粒子の散乱吸収特性に関するデータベースの構築

    中居裕貴, 円山重直, 小宮敦樹

    第5回日本伝熱学会東北支部学生発表会 2005年5月

  336. Development of Precise Visualization System for Minimal Diffusion Field Using Optical Interferometer

    International Workshop on Measurement and Diagnosis of Heat Transfer and Fluid Flow Systems 2005年4月22日

  337. ヒト死体鼓膜温・外耳道温の冷却動態の解析

    金涌佳雅, 金武潤, 境純, 橋谷田真樹, 舟山眞人, 汐崎徹, 小宮敦樹, 円山重直

    日本法医学会 2005年4月20日

  338. Visualization of Minimal Transient Diffusion Field and Measurement of Mass Diffusion Coefficients 国際会議

    A. Komiya, S. Maruyama, K. Mori

    6th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics 2005年4月

  339. Cooling Performance of Flexible Cryoprobe Using Peltier Effect 国際会議

    S. Maruyama, K. Nakagawa, A. Komiya

    6th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics 2005年4月

  340. Dynamics of the Fluid in the Vicinity of the Solid-liquid-gas Boundary Line (‘Contact Line’) 国際会議

    I. Ueno, A. Komiya, T. Watanabe

    6th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics 2005年4月

  341. Estimation of Upwelling by the Perpetual Salt Fountain for Sea Planting 国際会議

    K. Tsubaki, S. Maruyama, H. Mitsugashira, A. Komiya

    6th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics 2005年4月

  342. Creation of Ocean Forest by Upwelling of Deep Seawater Using Perpetual Salt Fountains 国際会議

    K. Tsubaki, S. Maruyama, H. Mitsugashira, X. R. Zhang, A. Komiya

    Oceans'04 MTS / IEEE Techno-Ocean'04 2004年11月9日

  343. 酸素/二酸化炭素燃焼法を用いた二酸化炭素回収型高効率発電プラントのシステム検討

    円山重直, 阿部一幾, 丸田薫, 小宮敦樹

    日本機械学会熱工学コンファレンス2004 2004年11月

  344. 医療応用微小運動素子の精密伝熱制御

    円山重直, 邵龍, 小宮敦樹

    日本機械学会熱工学コンファレンス2004 2004年11月

  345. 極小非定常拡散場の形成と高精度物質拡散係数の測定

    小宮敦樹, 円山重直, 森健太郎

    第25回日本熱物性シンポジウム 2004年10月

  346. A New Simple Approach for Calculating The Optical Constants of A Clear Glass Window From 0.19 to 5μm 国際会議

    M. Khoukhi, S. Maruyama, S. Bosi, A. Komiya, M. Behnia

    29th Annual National Conference of the Solar Energy Society of Canada Inc. 2004年8月21日

  347. 界面温度分布を考慮したマランゴニ振動流遷移条件の検討

    小宮敦樹, 松本聡, 依田眞一

    第41回日本伝熱シンポジウム 2004年5月

  348. 低Pr数流体の液柱マランゴニ対流遷移現象

    松本聡, 小宮敦樹, 林田均, 依田眞一, 夏井秀定, 今石宣之

    第41回日本伝熱シンポジウム 2004年5月

  349. 液滴振動法による表面張力測定における振幅の影響

    小野寺博樹, 松本聡, 小宮敦樹, 石川毅彦, Paul-Francois Paradis, 依田眞一, 若島健司

    第41回日本伝熱シンポジウム 2004年5月

  350. 液柱マランゴニ対流の振動流遷移条件の検討

    小宮敦樹, 松本聡, 依田真一

    宇宙航空研究開発機構宇宙科学研究本部第20回宇宙利用シンポジウム 2004年1月

  351. Modeling of Transition Mechanism to Oscillatory Marangoni Flow in a Liquid Bridge 国際会議

    A. Komiya, S. Matsumoto, S. Yoda

    42nd AIAA Aerospace Sciences Meeting & Exhibit 2004年1月

  352. 低プラントル数流体のマランゴニ対流の振動流遷移現象

    林田均, 松本聡, 小宮敦樹, 依田真一, 夏井秀定, 今石宣之

    宇宙航空研究開発機構宇宙科学研究本部第20回宇宙利用シンポジウム 2004年1月

  353. 液滴の大変形挙動に関する研究

    小野寺博樹, 松本聡, 小宮敦樹, 石川毅彦, Paul-Francious Paradis, 依田真一

    宇宙航空研究開発機構宇宙科学研究本部第20回宇宙利用シンポジウム 2004年1月

  354. Study on the Transition Mechanism of Thermocapillary Convection in a Liquid Bridge 国際会議

    A. Komiya, S. Matsumoto, S. Yoda

    10th International Space Conference of Pacific-basin Societies 2003年12月10日

  355. 液柱マランゴニ対流振動流遷移のモデル化

    小宮敦樹, 松本聡, 依田真一

    日本機械学会熱工学コンファレンス2003 2003年11月

  356. 低プラントル数流体の液柱マランゴニ振動流遷移過程

    松本聡, 小宮敦樹, 林田均, 夏井秀定, 安廣祥一, 今石宣之

    日本機械学会熱工学コンファレンス2003 2003年11月

  357. 液柱マランゴニ対流における振動流遷移メカニズム

    小宮敦樹, 松本聡, 依田真一

    第40回日本伝熱シンポジウム 2003年5月

  358. 低プラントル数流体におけるマランゴニ対流振動流遷移

    松本聡, 林田均, 小宮敦樹, 依田真一

    第40回日本伝熱シンポジウム 2003年5月

  359. Effect of Circumstance Temperature upon Marangoni Convection in a Liquid Bridge 国際会議

    A. Komiya, S. Matsumoto, S. Yoda

    Sixth Japan-Canada Workshop on Space Technology 2002年11月18日

  360. シリコーンオイルの表面張力および動粘性係数に関する検討

    小宮敦樹, 松本聡, 林田均, 依田真一, 福山誠二郎

    日本マイクログラビティ応用学会第18回学術講演会 2002年10月

  361. Pr=0.01流体のマランゴニ対流実験研究(5) –温度計測による振動流遷移過程の検討-

    林田均, 夏井秀定, 松本聡, 小宮敦樹, 依田真一

    日本マイクログラビティ応用学会,第18回学術講演会 2002年10月

  362. Pr=0.01流体のマランゴニ対流実験研究(6) –超音波による溶融金属内部流れ計測用トレーサ粒子の開発-

    夏井秀定, 小宮敦樹, 上薗剛, 尾前宏, 袖山研一, 福室直樹, 松本聡, 林田均, 依田真一

    日本マイクログラビティ応用学会第18回学術講演会 2002年10月

  363. 微小非定常拡散場における外力の影響

    小宮敦樹, 円山重直

    第39回日本伝熱シンポジウム 2002年5月

  364. 航空機実験用制振システム装置の開発

    円山重直, 大野健太郎, 小宮敦樹, 酒井清吾

    日本機械学会熱工学コンファレンス2001 2001年11月

  365. 微小重力環境における物質拡散係数の短時間計測

    小宮敦樹, 円山重直, 大野健太郎, 森健太郎

    日本マイクログラビティ応用学会第17回学術講演会 2001年10月

  366. Visualization and Measurement of Transient Diffusion Field under the Microgravity 国際会議

    A. Komiya, S. Maruyama, S. Sakai

    First International Symposium on Advanced Fluid Information 2001年10月

  367. 微小重力場における非定常拡散場の計測

    小宮敦樹, 円山重直, 大野健太郎

    第38回日本伝熱シンポジウム 2001年5月

  368. Influence of Gravity upon Transient Diffusion Fields of Aqueous Solutions 国際会議

    A. Komiya, S. Maruyama, S. Sakai, K. Tsukamoto

    2nd Pan-Pacific Basin Workshop on Microgravity Sciences 2001年5月

  369. 微小非定常拡散セルを用いた物質拡散係数の短時間測定

    円山重直, 小宮敦樹, 酒井清吾

    第21回日本熱物性シンポジウム 2000年10月

  370. 臨界流体中の温度伝搬と対流不安定性

    吉原正一, 石井孝治, 大西充, 比江島俊彦, 東久雄, 小宮敦樹, 圓山重直

    日本マイクログラビティ応用学会 2000年10月

  371. 位相シフト干渉計を用いた微小非定常拡散場の短時間計測

    円山重直, 小宮敦樹, 塚本勝男

    第37回日本伝熱シンポジウム 2000年5月

  372. Measurement of Transient Double Diffusive Convection and Crystal Growth Using Real-Time Phase-Shifting Interferometer 国際会議

    S. Maruyama, K. Takahashi, A. Komiya, M. Behnia

    Symposium on Energy Engineering in the 21st Century (SEE 2000) 2000年1月

  373. 位相シフト干渉計による微小非定常拡散場と物質拡散係数の短時間計測

    円山重直, 小宮敦樹, 郭志雄

    第36回日本伝熱シンポジウム 1999年5月

  374. Accurate Measurement of Mass Diffusion Field and Diffusion Coefficient Using Real-time Phase-shift Interferometer 国際会議

    S. Maruyama, A. Komiya, T. Shimoyama

    2nd Pacific Symposium on Flow Visualization and Image Processing 1999年5月

  375. Measurement of Diffusion Field and Crystal Growth Rate From Solution in Microgravity and Normal Gravity 国際会議

    S. Maruyama, J. Yabana, N. Sumi, A. Komiya, K. Tsukamoto, K. Shimizu, M. Fujishima

    Joint 1st Pan-Pacific Basin Workshop and 4th Japan-China Workshop on Microgravity Sciences 1998年7月

  376. 位相シフト干渉計とスライド式セルを用いた物質拡散係数の測定

    円山重直, 小宮敦樹, 矢花純, 塚本勝男

    第35回日本伝熱シンポジウム 1998年5月

  377. リアルタイム位相シフト干渉計を用いた物質拡散係数の測定

    円山重直, 小宮敦樹, 矢花純, 日向野三雄

    第18回日本熱物性シンポジウム 1997年10月

  378. 微小重力環境下における結晶成長速度と拡散場

    圓山重直, 矢花純, 鷲見直香, 小宮敦樹, 塚本勝男, 清水健司, 岡田繁信, 藤島基

    日本マイクログラビティ応用学会 1997年10月

  379. 高濃度ふく射性媒体中における自然対流境界層の八拓機構に関する研究

    古川琢磨, 江目宏樹, 岡島淳之介, 小宮敦樹, 円山重直

    第57回日本伝熱シンポジウム

  380. 異径多層マイクロチャネル構造を有したヒートシンクによる対流沸騰伝熱促進

    西村祐輔, 岡島淳之介, 大内琢也, 小宮敦樹

    第57回日本伝熱シンポジウム

  381. 二酸化炭素ハイドレート分解界面近傍における非定常熱物質輸送の定量計測と分解の律速評価

    神田雄貴, 小宮敦樹

    第57回日本伝熱シンポジウム

  382. Si基板上のSiO2ナノ粒子/PDMS懸濁液の微視的濡れ挙動の測定

    庄司衛太, 金子峻大, 米村建哉, 久保正樹, 塚田隆夫, 小宮敦樹

    第57回日本伝熱シンポジウム

︎全件表示 ︎最初の5件までを表示

産業財産権 9

  1. 物品収容装置

    圓山重直, 小宮敦樹, 中村典子, 松井啓祐

    特許6826588

    産業財産権の種類: 特許権

  2. 二酸化炭素低排出発電方法および二酸化炭素低排出発電システム

    圓山重直, 小宮敦樹, 岡島淳之介, 江目宏樹, 佐々木裕章

    産業財産権の種類: 特許権

  3. メタンガス回収方法および二酸化炭素低排出発電方法、ならびに、メタンガス回収システムおよび二酸化炭素低排出発電システム

    圓山重直, 岡島淳之介, 小宮敦樹, 陳林

    産業財産権の種類: 特許権

  4. 冷却装置

    圓山重直, 小宮敦樹, 岡島淳之介

    産業財産権の種類: 特許権

  5. 香味が向上したアルコール含有飲料

    圓山重直, 小宮敦樹, 中村典子, 松井啓祐

    産業財産権の種類: 特許権

  6. メタンガス回収方法および二酸化炭素低排出発電方法、ならびに、メタンガス回収システムおよび二酸化炭素低排出発電システム

    圓山重直, 岡島淳之介, 小宮敦樹, 陳林

    産業財産権の種類: 特許権

  7. ピストン冷却装置

    圓山重直, 小宮敦樹, 守谷修一, 長田守正, 小坂誠二, 河村康宏, 根岸潤也, 塚本能人

    特許第5692870号

    産業財産権の種類: 特許権

  8. 半導体ウェーハの温度制御装置および温度制御方法

    武知弘明, 高橋典夫, 清澤航, 圓山重直, 小宮敦樹

    大韓民国 第10-1209503号

    産業財産権の種類: 特許権

  9. 二酸化炭素低排出発電方法及びシステム

    圓山重直, 小宮敦樹, 知崎正純, 白樫了

    特許第5366300号

    産業財産権の種類: 特許権

︎全件表示 ︎最初の5件までを表示

共同研究・競争的資金等の研究課題 33

  1. マイクロチャネルを用いた局所冷却に関する研究 競争的資金

    制度名:Cooperative Research

    2016年7月 ~ 継続中

  2. アルコール系水溶液内物質移動現象に及ぼす外力の影響評価 競争的資金

    制度名:Cooperative Research

    2015年9月 ~ 継続中

  3. 巨大分子拡散現象の動的挙動高精度計測に関する研究 競争的資金

    制度名:Grant-in-Aid for Scientific Research

    2004年4月 ~ 継続中

  4. 超臨界流体による汚染土壌の改質・浄化 -高効率分離促進技術の開発- 競争的資金

    提供機関:Japan Society for the Promotion of Science

    研究機関:Tohoku University

    2020年1月 ~ 2024年12月

  5. 弾性熱量効果による低環境負荷高効率冷却機構の実現

    小宮 敦樹, LOMBARDI GIULIA

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for JSPS Fellows

    研究機関:Tohoku University

    2021年11月18日 ~ 2024年3月31日

    詳細を見る 詳細を閉じる

    本研究では,環境発電の一つである弾性熱量効果を用いたエネルギーの有効利用が可能な冷却機器の実現を目指すことを目的としている.研究初年度は4カ月間と短いため,本研究の基礎部分となる「弾性体材料評価」および「作動流体の流動様相評価」に特化した研究を計画し,それらを実行した.「弾性体材料評価」においては,既存の伸縮実験装置をどのように利用できるかについて検討を行い,実験装置の改良製作を行った.既に他の研究で製作した実験装置を有効利用することで準備期間の短縮化を図ることから,この4カ月間で,目的の材票の疲労試験および温度変化が検知できるよう実験装置の改良を行った.これにより,次年度初頭から複数の弾性体チューブによる伸縮発熱吸熱実験を実施することが可能となった.次年度以降、弾性体に係る応力と温度変化の関係を実験的に評価していく. 一方,「作動流体の流動様相評価」については,数値シミュレーションを主とした研究を進めた.OpenFOAMによる弾性体チューブ内流動様相計算を行い,1サイクルの発熱/吸熱過程において壁面の温度境界層厚さおよびその時空間的変化を定性的に解析した.境界条件には実験から得られる熱流束の時間平均値を与え,本年度は特に数値シミュレーションコードの妥当性について検討を行った.実際の系では流量,流れ方向,発熱量,チューブ径が時々刻々と変化するが,これら全てを考慮した計算コードの開発には4カ月では短いため,本年度はチューブ径と発熱量を固定し,流動様相の変化が伝熱形態に及ぼす影響についての評価を行った.本計算で得られた温度履歴を単一チューブの実験と比較した結果,定性的に良い一致が得られたことから計算の妥当性を評価し,次年度以降に固定した境界条件を実験のそれに置き換えることで定量評価に繋げていくこととした.

  6. 弾性熱量効果による低環境負荷高効率冷却機構の実現

    小宮 敦樹, LOMBARDI GIULIA

    2021年9月28日 ~ 2024年3月31日

  7. 物質輸送の時空間受動能動制御によるタンパク質低モザイシティ結晶化の実現

    小宮 敦樹, 神田 雄貴

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2021年4月 ~ 2024年3月

    詳細を見る 詳細を閉じる

    本研究課題では,タンパク質の特異性を利用して透過膜を介した液相内の物質輸送現象を能動制御し,タンパク質の低モザイシティ結晶化の実現を目指すことを目的としている.研究初年度の目標は,申請書に記載したように「既存の測定系を用い,透過膜を用いた物質流束測定実験を行う」とした.既有の干渉計に改良を施し,光学系を付加することで視野が0.5mm×0.5mmの顕微干渉計を製作した.また,これまでの研究で問題となっていた試料溶液の液漏れ問題を解決するために,ネジ機構を採用した特殊観察セルを製作し,透過膜近傍の過渡濃度分布をサブミリスケール(<100μm)で正確に捉えることに成功した. マイクロチャネル有孔透過膜のデザインと製作については,これまでの研究(科学研究費補助金:基盤研究(B)17H03181)で明らかにしてきた知見を利用し,規則的に円柱状マイクロ孔が配置された有孔透過膜を,本学マイクロ・ナノマシニング研究教育センターを利用して製作し,実験を行った.マイクロ孔直径は50~350μmとした.透過膜は複数製作し,孔径をパラメータにしているが,膜の総開口面積は等しくし,マイクロ孔のパターニングと孔径が物質透過量に及ぼす影響について評価した.その結果,総開口面積が等しいにも関わらず,大孔径で少数のパターニングの場合は膜透過量が少なく,反対に小孔径ではあるが多数の細孔を有する膜では透過量が多くなる傾向が得られた.この傾向は数値シミュレーションでも再現されており,物質透過量の可制御性が確認された.本研究成果は現在国際雑誌に投稿すべく,共同研究者と執筆をしている.また,2つの国際会議においてキーノート講演を行うことで,研究成果を世界的に周知した.次年度以降は,透過量の孔径依存性について解析的に研究を進めることとした.

  8. 複合伝熱制御技術による金ナノロッドと近赤外線光を用いた低侵襲治療法の開発

    提供機関:Japan Society for the Promotion of Science

    研究機関:Tohoku University

    2020年4月 ~ 2023年3月

  9. 先駆水和電子チャネル形成仮説による水中プラズマ超高速電荷移動機構の学理構築

    佐藤 岳彦, 杉本 俊之, 中林 孝和, 小宮 敦樹, 宮原 高志, 内田 諭, 上原 聡司

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (A)

    研究機関:Tohoku University

    2019年4月1日 ~ 2022年3月31日

    詳細を見る 詳細を閉じる

    ストリーマ発生・水和電子計測装置の設計作製を行い,水和電子の検出をストリーマ進展方向の画像解析,スカベンジャーによる化学的計測,赤色吸収測定,プローブ光吸収測定,ラマン散乱光計測,細胞応答計測により行う手法を検討ならびに開発した.また,水膜上のストリーマ進展時の電位変化による前駆現象を検証した.これらの結果より,世界で初めてプラズマによる水和電子生成の検証に成功し,ストリーマ進展において水和電子生成が影響を与えている可能性を示した.

  10. タンパク質高品位結晶化の実現に向けた物質拡散の時空間能動制御 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2017年4月 ~ 2021年3月

  11. ミクロ・ナノ熱工学によるがんの早期診断と低侵襲治療

    圓山 重直, 野中 崇, 細川 靖, 井関 祐也, 古川 琢磨, 岡部 孝裕, 藤村 卓, 岡島 淳之介, 小宮 敦樹, 山家 智之, 小玉 哲也, 櫻井 篤

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    2016年4月1日 ~ 2020年3月31日

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    本研究では11名の癌患者に対して,健常皮膚と病変部において皮膚有効熱伝導率測定を実施した.臨床試験の結果腫瘍が真皮層まで浸潤する場合において,病変部の有効熱伝導率が健常部よりも高い値を有することが明らかとなった.生体内の光多重散乱やGNRによるプラズモン加熱,体内の血流や代謝熱を考慮した複合伝熱解析を考慮し,レーザー治療時の複雑な生体内伝熱解析を行った.その結果,GNRsの注入は短い照射時間で局所加熱が可能であることがわかった.低侵襲型のレーザー治療の実験的手法による有用性について検討を行った.実験から,ペルチェ素子による表面冷却の有用性について評価することができた.

  12. 高濃度ナノフルイドの動的界面挙動に関するメゾスコピック解析

    塚田 隆夫, 阿尻 雅文, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2016年4月1日 ~ 2019年3月31日

    詳細を見る 詳細を閉じる

    本研究では,ポリジメチルシロキサン(PDMS)で表面修飾したSiO2ナノ粒子をPDMS中に分散した懸濁液を対象として,懸濁液滴がSi基板上を拡張する際にコンタクトライン前方に存在する先行薄膜のナノスケール膜厚分布を位相シフトエリプソメータにより観察し,ナノ粒子の存在の影響について検討した。また,溶媒蒸発時の表面修飾ナノ粒子の構造形成の数値シミュレーションを実施し,溶媒蒸発過程及び蒸発後の粒子多層膜の構造に及ぼす有機溶媒,修飾有機分子の種類およびその表面修飾率の影響を明らかにした。

  13. マランゴニ対流を利用した気液界面での革新的二酸化炭素吸収分離 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2017年4月 ~ 2019年3月

  14. タンパク質輸送を制御する -場の環境変化を利用した膜による能動制御-(国際共同研究強化) 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2015年4月 ~ 2019年3月

  15. 熱流束1MW/m2を超える電子機器用空冷フィンの挑戦

    圓山 重直, 小宮 敦樹, 伊賀 由佳, 岡島 淳之介

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Challenging Exploratory Research

    研究機関:Tohoku University

    2016年4月1日 ~ 2018年3月31日

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    高発熱密度が問題となっている電子機器の冷却問題に対し、流路内に設けたマイクロノズルを通過し断熱膨張する際に生じる低温の超音速流を利用し、さらに流路のマイクロ化によって高熱伝達化を図った新しい高熱流束冷却機構を評価した。製作に適した形状を有するマイクロノズルを数値解析により評価し、流動様相および伝熱過程を明らかにした。またマイクロノズルを有したヒートシンクを実際に製作し、マイクロノズルを有無による違いや伝熱量を実験的に評価した。実験によりマイクロノズルの有効性を示し、入口ゲージ圧0.3MPaG、加熱面温度 80℃の条件で、0.761MW/m2の熱流束を達成した。

  16. タンパク質輸送を制御する -場の環境変化を利用した膜による能動制御- 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2013年4月 ~ 2017年3月

  17. 10MW/m2の除熱を可能とする空気冷却の研究

    圓山 重直, 小宮 敦樹, 伊賀 由佳, 岡島 淳之介

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Challenging Exploratory Research

    研究機関:Tohoku University

    2013年4月1日 ~ 2015年3月31日

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    高発熱密度が問題となっている電子機器冷却を空気流で実現するために、断熱膨張で生じる低温の超音速流を利用し、さらに流路のマイクロ化によって境界層厚さの低減を図った新しい高熱流束冷却機構の実現可能性について評価した。その際、従来技術は計測不能であったマイクロチャネル内超音速流の密度場の高精度な可視化計測を、位相シフト顕微干渉計により成功した。さらに、本計測と数値解析結果との比較から、本研究で提案したマイクロ超音速ノズルを有するマイクロ熱交換器は、空冷ながら1.5MW/m2もの冷却性能を有することが示された。

  18. 生体界面プラズマ流の極限時空間制御による標的遺伝子群発現誘導機構

    佐藤 岳彦, 城倉 浩平, 小原 拓, 金澤 誠司, 宮原 高志, 小宮 敦樹, 大谷 清伸, 吉野 大輔

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (A)

    研究機関:Tohoku University

    2012年4月1日 ~ 2015年3月31日

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    本研究では,高速高圧電源の開発,高時空間分解能を有する可視化システムの構築,高精度プラズマ特性同期計測システムの構築により,自己保存プラズマ流の生成制御および観察法の開発・製作に成功した.自己保存プラズマ流は,電圧印加後数百ナノ秒後に電極先端に微細な気泡群を構成し,突起状気泡の先端から秒速2 km程度でパルス状の放電電流と同期して断続的に進展を開始することを明らかにした. 遺伝子群発現誘導については,弱いプラズマ刺激に対し,プラズマ刺激の主要因となる過酸化水素と異なる代謝,免疫,再生などの機能を有する遺伝子群が発現することを網羅的遺伝子解析により明らかにした.

  19. インフラ途絶下において利用可能な体温管理システムの開発

    古川 宗, 中川 敦寛, 鷲尾 利克, 久志本 成樹, 荒船 龍彦, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Challenging Exploratory Research

    研究機関:Tohoku University

    2012年4月1日 ~ 2014年3月31日

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    本研究では、災害時における低体温症患者の特徴を調査し、インフラが途絶した状況下で使用可能な体温管理デバイスを開発するための基礎知見を得ることを目的とした。【結果】東日本大震災後に発生した低体温症による入院患者の多くは32度以上で、毛布被覆によって復温を行ったが、良好な転帰をたどった。新たな体温調節デバイス開発は病院外診療を可能とし、災害急性期の病院負担軽減につながることが示唆された。この知見をもとに体温維持系と冷却系の実験モデルを構築し、今後のデバイス開発に向けた模擬モデル実験を開始した。

  20. 革新的光学干渉法による複雑系物質輸送過程の計測 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2009年4月 ~ 2012年3月

  21. 音が見える超高速大型位相シフト干渉計開発と乱流温度境界層の定量計測

    圓山 重直, 小宮 敦樹, 守谷 修一, 岡島 淳之介

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Challenging Exploratory Research

    研究機関:Tohoku University

    2011年 ~ 2012年

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    高感度かつ高速度な計測を可能とする超高速大型位相シフト干渉計を開発した。位相シフトデータを高速に取得するため、新たに位相シフト・ケスタープリズムを開発した。さらに凹面鏡と準コモンパス3次元光路を採用し、風洞内に大型準コモンパスマッハツェンダー干渉計を構築した。そして、トリッピングワイヤを取り付けた加熱円柱周りの温度場から温度境界層の乱流遷移を観察した。また、円柱周りの圧力場を計測し、音場の計測の可能性を示した。さらに、加熱平板上に発達する温度境界層を計測し、速度場の推定を行った。

  22. ふく射の空洞量子効果による革新的水素製造機構の解明

    圓山 重直, 小宮 敦樹, 岡島 淳之介, 宮本 明, 湯上 浩雄

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2009年 ~ 2011年

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    本研究は、高度に制御されたマイクロ構造体を作成し、空洞内ふく射と諸種のガス分子が熱力学的に非平衡状態で改質反応を起こさせることによって、高効率に水素を得るものである。精密なマイクロ構造体の作成をめざし、コロイド結晶鋳型法と酸化チタン浸潤法を比較し、コロイド結晶鋳型法によるセラミック構造体がもっとも構造体の構造制御にふさわしいことを確認した。このマイクロ構造体を用いて、水蒸気改質実験を行い、構造体の有無の違いにより改質反応量に違いが生じることを確認した

  23. 永久塩泉による海洋深層水湧昇と海洋表層緑化メカニズムの解明

    圓山 重直, 小宮 敦樹, 矢吹 崇

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2008年 ~ 2010年

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    本研究では、海洋砂漠と言われる海洋の栄養塩が少ない海域に栄養分に富む海洋深層水を大規模にくみ上げて、その海域を局所的に富栄養化し、環境にどのような影響を与えるかを解明することを目的とする。マリアナ海域でのフィールド実験で得られた実験データを基に海洋緑化の実現性を検証した。衛星データを基に、パイプの軌跡に沿ってクロロフィル濃度変化量を積分することにより海洋深層水汲み上げによってクロロフィル濃度が増加していることを明らかにした。

  24. 体表冷却による脊髄保護

    田林 晄一, 齋木 佳克, 川本 俊輔, 本吉 直孝, 圓山 重直, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (C)

    研究機関:Tohoku University

    2008年 ~ 2010年

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    体表冷却による脊髄虚血保護を行うことで、胸腹部大動脈瘤手術の合併症である対麻痺防止を計ることを目的とした。事前の実験による動物モデル及び軽度低温による人体の測定により、皮膚冷却による深部温のシミュレーションモデルは作成しえた。しかしPreliminaryな実験で皮膚冷却により軽度の凍傷を生じ、倫理的な側面から臨床応用は見送られた。

  25. 生体環境内でのタンパク質拡散現象評価 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2007年4月 ~ 2009年3月

  26. 複合ナノ粒子群によるふく射伝熱制御省エネシステムの研究

    圓山 重直, 小宮 敦樹

    2007年 ~ 2008年

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    研究最終年度の本年度は, 前年度で得られた機能性複合ナノ粒子構造体のふく射伝熱特性を検討し, さらに最適なナノ粒子の粒径・空間分布を推定するとともに, 酸化チタンやアルミナ以外の粒子を使用することを検討した. また, 太陽光の吸収特性と室内の熱環境特性を考慮した機能性ナノ粒子構造体の省エネルギー効果について, 実際のナノ粒子を含んだ塗料を複数製作し, そのふく射伝熱特性を検証した. 具体的には, 酸化チタンおよびアルミナ粒子を用いてナノ構造体の設計を行い, 昨年度行った理論的推定と実験の成果を検討し, さらに最適な粒径検討を行い, 良好なナノ構造体の設計を行った. また, 各波長のふく射に対する反射・放射特性を前年度に構築した測定システムで計測を行った. これらのデータに基づき, 家屋や自動車にこのナノ構造体を適用した場合についての伝熱特性解析のためのモデル化も検討した. このモデル化には, これまでに構築してきた環境におけるふく射伝熱モデルを応用し, 視覚的, すなわち可視の波長領域では反射率を低減し景観を考慮したふく射特性を有し, 近赤外領域においては, 反射率を増加させることで太陽光からの伝熱を制御する機能性構造体を検討した. 併せて「色評価」を行うことで, 赤外領域では大きく反射率が異なる機能性構造体でも, 可視領域においては, その色および輝度が大きく変わることなく, 色調を変えないまま近赤外領域において反射率を制御することができることを明らかにした. 以上の実験およびモデル化検討の結果を総括的に検討し, ナノ粒子構造体が省エネ効果に及ぼす効果について明らかにした. 当該年度において得られた成果は, 国内外の研究会およびシンポジウムにて発表を行った.

  27. 伝熱制御による医工学の新展開-生命の質への挑戦-

    圓山 重直, 山家 智之, 相場 節也, 冨永 悌二, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (A)

    研究機関:Tohoku University

    2006年 ~ 2008年

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    本研究では、高精度伝熱制御技術を用いた治療ついて検討を行うとともに、その技術確立を図った。高精度皮膚凍結手術用冷却装置を開発し、動物実験により到達温度と細胞壊死との関係を定量的に評価した。また、微小領域凍結手術に向けた微小クライオプロ-ブを開発し、脳機能マッピングを高精度に行うための脳冷却マッピング法を提案した。 温熱療法においては、臨床現場における安全性を確保し、効率的に治療を行うことを目指し、接触型加熱円盤装置、ふく射加熱装置の二種類の治療装置を開発しその評価を行った。

  28. 微小火炎に見られるパターン形成の機構解明

    丸田 薫, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2006年 ~ 2007年

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    各種パラメータが形成される火炎パターンに及ぼす影響,またそのパターン形成領域の整理を進め,論文として投稿した。また火炎のパターン毎に代表的な条件を抽出,流れ場と火炎パターンとの関係を検討するためのデータを蓄積した。実験結果を参考に,理論解析および数値計算のモデル変更,コードの変更を進めた。特に数値計算の初期擾乱モデルと,実際の現象との関連を考慮して基礎特性を数値的に予測可能か検討した。その結果,数値計算の化学反応項の取り扱いにポイントがあることが判明し,化学反応項に修正を行ったところ,数種類以上の火炎パターンが数値的にも再現される可能性があることが明らかとなった。これを受けて研究協力を行っているロシア科学アカデミーの研究者と共同で二次元のパターン形成に関する数値計算に重点を置いて実施したところ,ペルトン水車型の火炎など,いくつかのパターンを再現することに成功し,この結果をとりまとめて論文として投稿している。 火炎パターンの形成の機構解明の進捗と併せて,混合気の不足成分のルイス数効果にも着目した実験を行うため,燃料を変えルイス数を変化させながらその影響を検討した。その結果,DMEを用いた場合の燃料が過剰な条件と,メタンを用いた場合の燃焼希薄な条件下でペルトン水車型火炎にセル状の構造が重畳される,ルイス数効果によると思われる現象が初めて観察されている。

  29. 移動する固液境界線(コンタクトライン)近傍流体のメゾスコピック動力学

    上野 一郎, 木村 達人, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (C)

    研究機関:Tokyo University of Science

    2005年 ~ 2007年

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    固体面上における液滴の移動などに見られるような「濡れ」の問題は,部分的濡れを有するありとあらゆる系に見られるものである.微小重力環境下においては重力の影響がほぼ無視できるため,地上において重力駆動による液体移動時にはほぼ見られなかった,固液気3相境界線(コンタクトライン)近傍流体の動力学に起因する影響が顕著化する. すわなち,所謂「濡れ性」と呼ばれる性質が重要となるわけであるが,この性質は界面近傍の分子レベルからなるミクロな現象が,液滴全体の形状や運動といったマクロ的な挙動に影響を与えるというメゾスコピックな現象であると言える.本研究グループでは,このようなメゾスコピックな熱流体力学に関する知見を蓄積すると共に,宇宙環境における部分的な濡れを有する系を利用した応用技術の高効率化,また部分的濡れを有する系の環境制御可能化を目指して研究を行っている.本研究では実験および分子動力学を用いた数値計算から当該現象にアプローチを行った. 実験的研究においては,特に先行薄膜存在領域に対する液滴静水圧の影響,また,基板上の温度不均一分布が先行薄膜領域に与える影響について明らかにした.また,位相シフト技術の導入により干渉計の高精度化を行った.さらに,高速度カメラを導入し,先行薄膜形成初期過程の可視化を実現した. 分子動力学法を用いた数値計算では,固体線上周りに形成したナノスケール液膜に関する動力学として,レナード・ジョーンズ流体に関して液膜に生起するRayleigh-Plateau不安定性に関する基礎的な知見を蓄積し,マクロ的な現象との比較を行った.

  30. 固気液界面(コンタクトライン)ダイナミクスの高精度測定 競争的資金

    小宮敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grant-in-Aid for Scientific Research

    2004年4月 ~ 2006年3月

  31. 電場印加による吸着制御を利用した触媒反応の活性化

    丸田 薫, 小宮 敦樹

    2005年 ~ 2006年

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    本研究では,触媒への電場印加によって,低温域での触媒反応の阻害因子である酸素分子の吸着を防ぎ,より低温域から触媒を活性化する新しい技術を確立することを目標に研究を進めた。酸素分子の吸着が,低温域における触媒反応活性化の阻害因子であるという研究結果と,ガス漏れセンサの原理を逆にした「電場印加」という手法の組み合わせにより,触媒反応の制御を目指した。 製作した初期の実験装置によって,電場印加によって触媒反応の活性が変化すること,さらに印可電圧の極性を逆転させることで活性が促進,あるいは抑制される効果が確認できたが,極性の変化に対する触媒温度の上昇傾向が,新しい触媒を使用した場合には一定の傾向を示すものの,複数回実験を繰り返す内に特性が大きく変化したり,極性の促進・抑制の傾向が逆転する場合があることが明らかとなった。こうした結果について検討するため,反応器主要部の構造について,温度の安定などの見地から,反応管内に二枚の白金を電極として設ける形式に変更を行い,上記の再現性と反応促進・抑制傾向の不一致の原因を調べた。赤外線計測による表面状態の把握と,反応管出口の気体濃度計測の二つの方法で触媒反応の進行度合いの把握を図るべ実験を進めた。赤外線計測では計測そのものに電場の影響を排除しきれない懸念が残り,気体濃度計測を優先的に実施した。結果的には,高温による触媒保持部の変形が温度不安定の原因であったことが判明し,反応管内部の触媒保持方法に改良を加えた結果,ライトオフ寸前の触媒温度域で電場印可することで,電場強度に対してほぼ比例的に反応進行度が増大するという信頼できるデータが得られた。

  32. 非平衡熱電素子を用いた医療用急速冷却伝熱制御の研究

    圓山 重直, 山家 智乏, 小宮 敦樹

    2004年 ~ 2005年

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    本年度は,昨年度製作したクライオプローブを用いて実験的解析的研究を遂行し,凍結手術の際の効率的な冷却手法についての検討を行った.また昨年度の検証実験で明らかとなった,連続運転による最下点到達温度が長時間維持できないという問題点の克服のため,クライオプローブ先端部の構造を見直し,新たな先端部設計のクライオプローブの製作も行った. 圓山代表者により生体冷凍治療クライオプローブ先端部の再設計が行われ,先端部の熱が効率的に冷媒側に輸送されるデザインとし,高熱流束冷却伝熱制御を可能とした.新たに製作されたクライオプローブの性能評価は,小宮分担者による生体を擬似した寒天を用いた実験で行われた.これにより,新設計のクライオプローブでは長時間運転による最低到達点温度の上昇は認められず,昨年度製作したプロトタイプの問題点を克服できたと位置づけることができる. また,凍結手術の際の効率的な冷却方法についても解析的・実験的に検証を行った.解析的には生体伝熱方程式を用いて高精度数値シミュレーションを行い,表皮深部の真皮層の過渡冷却現象を視覚的に理解し,そこから高効率冷却法を検討した.また実験的には,モルモットの背皮を用いた動物実験を行い,数値シミュレーションを用いて検討した冷却方法での過渡冷却現象を観察した.これらの実験より,目標としている細胞を高効率に壊死させるには,急速冷却の他に繰り返し冷却法を施すことで達成できることが明らかとなった. これらの研究成果は,別紙に示すごとく国内外の学術講演会にて発表を行っており,熱工学の分野にとどまらず医学分野においても高い評価を得ている.

  33. 反応帯厚さと同程度の微小領域に実現される燃焼現象に関する研究

    丸田 薫, 酒井 清吾, 小宮 敦樹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:TOHOKU University

    2004年 ~ 2005年

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    外部加熱を受け、流れ方向に温度勾配を有する石英円管チャネル内を減圧し、火炎帯を厚くすることで、大気圧下における火炎帯厚さと同程度に微小な領域(円管の代表径と同程度の領域)での燃焼を実現し、そのような条件下での燃焼現象を理解することが本研究の目的である。外部加熱を利用することにより、熱損失の影響を排除したうえで空間的な制約のある場での燃焼現象を観察できる。ここでは0.06-0.6atmにおいて、加熱された微小円管内に実現される予混合火炎の燃焼特性を実験および数値計算により調べた。 1.実験及び数値計算結果より減圧環境下では緩慢な燃焼となり火炎帯が厚くなることを確認した。また圧力0.2atmのとき、火炎帯厚さは大気圧下の10倍以上となり火炎帯厚さと同程度に微小な流路内における燃焼が実現できた。管径の大きな通常の管内消炎では、火炎は曲率を持つのが普通であるが、本研究の場合には火炎厚みは増大するものの、消炎近傍でも平面状のままであった。 2.実験により求めた可燃領域について、流速の上限界は理論混合比に対して非対称となり希薄側の方がより可燃領域が広くなることを確認した。しかし、数値計算により求めた可燃領域は当量比0.8付近で最大となり、さらに希薄側では狭くなる可能性があると考えられる。 3.本実験において消炎直前のPeclet数が非常に小さいことより、壁への伝熱量は大きいと考えられるが、外部加熱により熱損失の影響が小さくなるため火炎は定在できると考えられる。 4.吹き飛び直前の火炎について、燃料希薄側では反応速度が大きいため高流速域においても火炎を定在させることができ、このことが実験結果の傾向を説明する一つの理由であることがわかった。

︎全件表示 ︎最初の5件までを表示

担当経験のある科目(授業) 4

  1. Environmental Heat Transfer Tohoku University

  2. Heat Transfer Tohoku Univeristy, National Institute of Technology, Hachinohe College

  3. 環境伝熱制御工学 東北大学

  4. 伝熱工学 東北大学,八戸工業高等専門学校

社会貢献活動 51

  1. 日本宇宙少年団仙台たなばた分団副分団長

    2008年4月1日 ~ 継続中

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    日本宇宙少年団仙台たなばた分団副分団長として、月毎の活動に参加協力をしている.

  2. 「楽しい理科の話~不思議の箱を開けよう~」出前授業

    2019年6月5日 ~ 2019年6月5日

  3. 「楽しい理科の話~不思議の箱を開けよう~」

    2018年7月17日 ~ 2018年7月17日

  4. ペットボトルロケットを作って飛ばそう 科学教室

    2018年2月10日 ~ 2018年2月10日

  5. サイエンスデイ

    2017年7月16日 ~ 2017年7月16日

  6. 「楽しい理科の話~不思議の箱を開けよう~」

    2017年6月21日 ~ 2017年6月21日

  7. サイエンスデイ

    2016年7月17日 ~ 2016年7月17日

  8. 令和3年度第21回東北大学出前授業「ペットボトルロケット出前工作授業」

    宮城県仙台市宮城野区幸町2丁目19-1 宮城県仙台市立幸町小学校

    2021年11月12日 ~

    詳細を見る 詳細を閉じる

    小学6年生 38名の参加 9:00-11:30

  9. 平成28年度文部科学省宇宙航空科学技術推進委託費アウトリーチ活動

    2017年1月28日 ~

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    平成28年度文部科学省宇宙航空科学技術推進委託費アウトリーチ活動

  10. 河北新報社主催「楽しい理科の話~不思議の箱を開けよう~」出前授業

    2016年7月7日 ~

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    河北新報社主催「楽しい理科の話~不思議の箱を開けよう~」出前授業

  11. 東北大学高度教養教育・学生支援機構と福島県立会津高等学校との教育連携

    2015年7月25日 ~

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    東北大学高度教養教育・学生支援機構と福島県立会津高等学校との教育連携に関する講演

  12. 「ペットボトルロケット出前工作授業」

    2011年10月28日 ~

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    宮城県仙台市立生出小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  13. 宇宙子どもワークショップ2011 in 仙台

    2011年9月24日 ~

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    JAXA広報部と協力し,宇宙に関する知識を子供たちに理解してもらう.宇宙飛行士を交えての公開講座を行う.合わせて,ペットボトルロケットの製作と飛行大会を行う.

  14. 日本航空宇宙学会北部支部「第18回科学講演会」

    2011年9月4日 ~

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    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  15. 河北新報主催「楽しい理科の話~不思議の箱を開けよう~」出前授業

    2011年7月20日 ~

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    宮城県仙台市立福岡小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  16. キッズ・エネルギー・シンポジウム2010

    2010年11月13日 ~

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    エネルギーに関する講演を行い、講演後はエネルギーに関するきっと製作を通して、エネルギーの重要性を知ってもらう。

  17. 日本航空宇宙学会北部支部「第17回科学講演会」

    2010年9月5日 ~

    詳細を見る 詳細を閉じる

    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  18. 「ペットボトルロケット出前工作授業」

    2010年9月3日 ~

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    宮城県仙台市立八木山南小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  19. 大学出前授業

    2010年7月9日 ~

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    宮城県仙台南高等学校2年生に「光の不思議 -地球温暖化はなぜ起こる?-」という題目のもと,エネルギーに関する講演を行う.

  20. 河北新報主催「楽しい理科の話~不思議の箱を開けよう~」出前授業

    2010年5月31日 ~

    詳細を見る 詳細を閉じる

    宮城県仙台市立福岡小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  21. 大学出前授業

    2009年11月13日 ~

    詳細を見る 詳細を閉じる

    宮城県仙台南高等学校1年生に「不思議な宇宙、特殊空間の有効利用」という題目のもと,日本の宇宙活動に関する講演を行う.

  22. 「ペットボトルロケット出前工作授業」3

    2009年9月18日 ~

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    宮城県仙台市立野村小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  23. 「ペットボトルロケット出前工作授業」2

    2009年9月18日 ~

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    宮城県仙台市立鶴巻小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  24. 「ペットボトルロケット出前工作授業」

    2009年9月17日 ~

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    宮城県仙台市立南小泉小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  25. 日本航空宇宙学会北部支部「第16回科学講演会」

    2009年9月6日 ~

    詳細を見る 詳細を閉じる

    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  26. 文部科学省スーパーサイエンスハイスクール(SSH)講義11

    2009年6月22日 ~

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    「重力がない環境を利用する -無重量という極限環境-」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  27. 河北新報主催「理科を好きになる~不思議の箱を開けよう~」出前授業

    2009年6月17日 ~

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    宮城県仙台市立市名坂小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  28. 新潟大学VBL特別講演会

    2009年3月24日 ~

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    新潟大学VBL特別講演会にて「逆問題解析による物質拡散係数導出法とタンパク質拡散現象に及ぼす広域緩衝液の影響」という題目のもと,講演を行う.

  29. 「ペットボトルロケット出前工作授業」

    2008年11月6日 ~

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    宮城県仙台市立貝森小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  30. 日本航空宇宙学会北部支部「第15回科学講演会」

    2008年9月7日 ~

    詳細を見る 詳細を閉じる

    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  31. 文部科学省スーパーサイエンスハイスクール(SSH)講義10

    2008年6月16日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する -無重量という極限環境-」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  32. 日本航空宇宙学会北部支部「第14回科学講演会」

    2007年9月2日 ~

    詳細を見る 詳細を閉じる

    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  33. 大学出前授業

    2007年6月22日 ~

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    宮城県仙台南高等学校2年生に「宇宙環境利用における工学の役割」という題目のもと,日本の宇宙活動に関する講演を行う.

  34. 文部科学省スーパーサイエンスハイスクール(SSH)講義9

    2007年5月28日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する -無重量という極限環境-」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  35. 大学出前授業

    2006年11月17日 ~

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    宮城県仙台南高等学校1年生に「無重量状態と宇宙の利用 ~無重量という極限環境~」という題目のもと,日本の宇宙活動に関する講演を行う.

  36. 日本航空宇宙学会北部支部「第13回科学講演会」

    2006年9月3日 ~

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    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  37. 「ペットボトルロケット教室」

    2006年7月16日 ~

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    宮城県利府町葉山 シーアイタウン葉山内にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  38. 文部科学省スーパーサイエンスハイスクール(SSH)講義8

    2006年5月15日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する -無重量という極限環境-」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  39. サイエンス・スクール「ペットボトルロケット出前工作授業」

    2005年10月19日 ~

    詳細を見る 詳細を閉じる

    宮城県仙台市立長命ヶ丘小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  40. 日本航空宇宙学会北部支部「第12回科学講演会」

    2005年9月3日 ~

    詳細を見る 詳細を閉じる

    ペットボトルロケット製作法について、よく飛ぶ方法等を説明し、実際に製作をしてもらう。製作後に打ち上げ大会を行い、飛行距離を競い合う。

  41. 「ペットボトルロケット出前工作授業」

    2005年7月20日 ~

    詳細を見る 詳細を閉じる

    宮城県利府町立青山小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  42. 文部科学省スーパーサイエンスハイスクール(SSH)講義7

    2005年5月16日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する -無重量という極限環境-」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  43. 文部科学省スーパーサイエンスハイスクール(SSH)講義6

    2004年11月22日 ~

    詳細を見る 詳細を閉じる

    「無重力状態と宇宙の利用」というタイトルのもと,群馬県立高崎高等学校SSH生徒に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

  44. サイエンス・スクール「ペットボトルロケット出前工作授業」

    2004年10月19日 ~

    詳細を見る 詳細を閉じる

    宮城県仙台市立大沢小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  45. 「ペットボトルロケット出前工作授業」

    2004年7月20日 ~

    詳細を見る 詳細を閉じる

    宮城県利府町立青山小学校にて、ロケット推進原理をわかりやすい具体例を通して説明し、ペットボトルロケットの製作を行う。製作後、打ち上げ機にて実際の打ち上げを行い、飛行距離を競い合う。

  46. 文部科学省スーパーサイエンスハイスクール(SSH)合同成果発表会

    2004年3月13日 ~

    詳細を見る 詳細を閉じる

    群馬県下で2003年度に行われてきたSSH活動の合同成果発表会にパネリストとして参加し,生徒の成果発表について意見を述べ討論を行った.

  47. 文部科学省スーパーサイエンスハイスクール(SSH)講義5

    2003年12月8日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する」というタイトルのもと,群馬県立高崎高等学校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義/実験を行った.

  48. 文部科学省スーパーサイエンスハイスクール(SSH)講義4

    2003年11月8日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する」というタイトルのもと,群馬県理科教員代表者に低軌道上で実現される微小重力環境下での物理現象について講義を行い,実験を行った.

  49. 文部科学省スーパーサイエンスハイスクール(SSH)講義3

    2003年10月15日 ~

    詳細を見る 詳細を閉じる

    「宇宙の不思議!なんでだろう」というタイトルのもと,群馬県立伊勢崎東高等学校に低軌道上で実現される微小重力環境下での物理現象について講義・意見交換を行った.

  50. 文部科学省スーパーサイエンスハイスクール(SSH)講義2

    2003年8月20日 ~

    詳細を見る 詳細を閉じる

    「重力がない環境を利用する」というタイトルのもと,群馬県立高崎工業高校の生徒に低軌道上で実現される微小重力環境下での物理現象について講義・実験を行った.

  51. 文部科学省スーパーサイエンスハイスクール(SSH)講義1

    2003年8月19日 ~

    詳細を見る 詳細を閉じる

    「宇宙の不思議!なんでだろう」というタイトルのもと,群馬県理科教員代表者に低軌道上で実現される微小重力環境下での物理現象について講義を行った.

︎全件表示 ︎最初の5件までを表示

メディア報道 6

  1. ゴムの伸び縮みで高効率冷却 東北大、エアコン・冷蔵庫に応用

    日経産業新聞 日経産業新聞 日経産業新聞

    2023年2月20日

    メディア報道種別: 新聞・雑誌

  2. ゴムの伸び縮みで冷却 東北大、有害な冷媒を不要に

    日本経済新聞 日本経済新聞 日本経済新聞オンライン

    2023年2月6日

    メディア報道種別: 新聞・雑誌

  3. 東北大、ゴム伸縮時の弾性熱量効果を利用した冷却機構の高効率化に成功

    日本経済新聞 日本経済新聞 日本経済新聞オンライン

    2023年1月24日

    メディア報道種別: 新聞・雑誌

  4. 自然対流伝熱性高める 東北大など微量エネルギーで冷却

    日刊工業新聞 日刊工業新聞 日刊工業新聞

    2021年7月13日

    メディア報道種別: 新聞・雑誌

  5. 東北大、自然対流の固有周波数の存在を実験的に捉えることに成功

    日本経済新聞 日本経済新聞 日本経済新聞オンライン

    2021年7月6日

    メディア報道種別: 新聞・雑誌

  6. わずかなエネルギーで熱の移動量を大幅に促進 - 低エネルギーでの伝熱機器冷却効率向上に期待 - 執筆者本人

    東北大学広報室,流体科学研究所広報戦略室 東北大学ホームページ,流体科学研究所ホームページ

    2021年7月6日

    メディア報道種別: インターネットメディア

︎全件表示 ︎最初の5件までを表示

学術貢献活動 4

  1. Journal of Thermal Science and Technology

    2020年4月 ~ 継続中

    学術貢献活動種別: 査読等

  2. Engineered Science Energy & Environment

    2019年2月 ~ 継続中

    学術貢献活動種別: 査読等

  3. Journal of Flow Visualization and Image Processing

    2018年2月 ~ 継続中

    学術貢献活動種別: 査読等

  4. ransactions of the JSME (in Japanese), Mechanical Engineering Journal, Mechanical Engineering Letters, Bio, Medical, Sports and Human Engineering

    2014年4月1日 ~ 継続中

    学術貢献活動種別: 査読等

その他 13

  1. 高濃度ナノフルイドの動的界面挙動に関するメゾスコピック解析

    詳細を見る 詳細を閉じる

    高濃度ナノフルイドの動的界面挙動に関するメゾスコピック解析を行う.

  2. アルコール系水溶液内物質移動現象に及ぼす外力の影響評価

    詳細を見る 詳細を閉じる

    アルコール系水溶液内物質移動現象に及ぼす外力の影響を評価する.

  3. 選択透過性膜を用いた物質移動制御

    詳細を見る 詳細を閉じる

    周囲環境によって物質透過量が変化する機能性膜を生成し,タンパク質の物質輸送制御を試みる.機能性膜内の狭チャネル幅を制御することでタンパク質の拡散を制御する.

  4. 立方体閉空間内の自然対流不安定性に関する研究

    詳細を見る 詳細を閉じる

    立方体閉空間内の自然対流不安定性に関して,数値解析的および実験的アプローチを行い,不安定メカニズムを解明する.

  5. 手術時における脊髄冷却方法の研究

    詳細を見る 詳細を閉じる

    手術時における開胸部からの脊髄冷却方法を実験的に検証し,その冷却可能性を評価する.

  6. 微小重力環境下における極低温流体挙動解明に関する研究

    詳細を見る 詳細を閉じる

    微小重力環境下における極低温流体(液体窒素)の界面挙動を観察し,その現象解明を行う.

  7. 多成分系溶液内の物質移動現象解明に関する研究

    詳細を見る 詳細を閉じる

    多成分系溶液内の物質移動現象を干渉計で高精度可視化し,物質拡散係数を導出する.併せて,物質間の交差項を評価する.

  8. マイクロチャネル内での物質拡散場の高精度計測に関する研究

    詳細を見る 詳細を閉じる

    珪藻類の呼吸に関するマイクロチャネル内物質拡散場の高精度計測を行う.併せて物質移動制御に関する研究を行う.

  9. 湧昇流の振動流遷移に関する研究

    詳細を見る 詳細を閉じる

    定常状態から振動湧昇流に遷移する過程について,噴出流速,密度差をパラメータとした実験的解析的研究を遂行し,その遷移メカニズムを解明する.

  10. 生体高分子物質拡散係数の周囲環境依存性に関する研究

    詳細を見る 詳細を閉じる

    生体高分子の非定常拡散場を計測することで,生体高分子の拡散係数を測定するとともに,拡散現象が周囲温度および溶液のpH値に対してどのように変化するか,実験的に解明することを目的とする.

  11. 生体高分子物質拡散の周囲環境依存性に関する研究

    詳細を見る 詳細を閉じる

    生体高分子の拡散現象が周囲環境にどのような影響を及ぼされているか,実験的研究により解明する.光学干渉計を用いて非定常拡散場を可視化し,物質拡散係数を導出することで拡散現象を定量化する.

  12. マランゴニ対流現象モデル化研究

    詳細を見る 詳細を閉じる

    液柱形状の自由界面上に生じるマランゴニ対流の振動流遷移過程をモデル化する.低Pr数および高Pr数流体それぞれの遷移過程をモデル化し,実験的・数値解析的アプローチにより,モデルの妥当性を評価する.

  13. 固気液界面(コンタクトライン)ダイナミクスに関する研究

    詳細を見る 詳細を閉じる

    固気液界面(コンタクトライン)近傍の動的液面挙動を高精度可視化し,液滴の移動メカニズムの解明を探る.分子動力学計算で存在が示されている先行液膜を実験的に観察し,液滴移動がどのように行われるかをモデル化する.

︎全件表示 ︎最初の5件までを表示