研究者詳細

顔写真

リユウ　スウエイ
Liu Siwei
Liu Siwei
所属
流体科学研究所　ナノ流動研究部門　生体ナノ反応流研究分野
職名
助教
学位

  • 博士（工学） （華中科技大学）

経歴 5

  • 2021年1月 ～ 継続中
    東北大学　流体科学研究所　助教

  • 2024年9月 ～ 2025年3月
    チューリッヒ工科大学　流体力学研究所　アカデミックゲスト

  • 2024年1月 ～ 2024年2月
    チューリッヒ工科大学　流体力学研究所　アカデミックゲスト

  • 2023年2月 ～ 2023年2月
    チューリッヒ工科大学　流体力学研究所　アカデミックゲスト

  • 2020年10月 ～ 2020年12月
    東北大学　流体科学研究所　学術研究員

委員歴 2

  • 静電気学会　複雑系静電気ダイナミクス研究委員会

    2024年1月 ～ 継続中

  • 静電気学会　静電気・高電圧・放電・プラズマ若手研究委員会

    2022年9月 ～ 継続中

所属学協会 3

  • 静電気学会

    2021年1月 ～ 継続中

  • 日本機械学会

    2021年1月 ～ 継続中

  • IEEE

    2018年 ～ 継続中

研究キーワード 12

  • 環境処理

  • 殺菌

  • 帯電

  • 準液滴

  • 高速ナノ液滴

  • 気泡

  • 紫外線

  • X線

  • 高速イメージング

  • キャビテーション

  • パルスパワー技術

  • プラズマ流

研究分野 3

  • エネルギー / プラズマ科学 /

  • ものづくり技術（機械・電気電子・化学工学） / 電力工学 /

  • ものづくり技術（機械・電気電子・化学工学） / 流体工学 /

受賞 4

  1. Best Presentation Award

    2024年3月　ISPlasma 2024　Plasma Discharge Inside a Laser-Induced Cavitation Bubble

  2. 増田賞

    2022年9月　静電気学会

  3. Best Paper Award

    2021年12月　The 12th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology　Modeling of spark channel of microsecond pulsed discharge in water

  4. 博士課程国家奨学金

    2018年11月　中国教育部

論文 92

  1. Flow-coupled charge separation of high-speed nanodroplet impingement on metal plates 査読有り

    Jiun-Shian Lee, Siwei Liu, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Takehiko Sato

    Journal of Physics D: Applied Physics　59　(28)　285302-285302　2026年7月14日

    出版者・発行元： IOP Publishing

    DOI： 10.1088/1361-6463/ae84e0 　

    ISSN：0022-3727

    eISSN：1361-6463

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    Abstract Contact electrification, or triboelectrification, is a charging mechanism at the liquid–solid interface, inspiring water-droplet triboelectric nanogenerators. This study reveals a flow-coupled charge removal effect during charging by testing grounded and insulated metal plates under high-speed nanodroplet spraying. Under grounded conditions, capturing the instantaneous charge transfer, the on-plate current has a maximum at a nozzle-to-plate distance of 1 mm (37.5 nA for aluminum and −35.9 nA for copper) and decreases monotonically with distance. The current of reflected flow after impingement exhibits opposite polarity but a similar distance-dependent trend, indicating charge separation. The electrostatic elimination rate shows the same distance dependence, with a maximum of −5000 V s –1 at 1 mm. In contrast, under insulated conditions as a steady state, the surface potential exhibits a non-monotonic dependence on distance, peaking at 5 mm (2531 V for aluminum and −2889 V for copper). At 1 mm, the lower steady-state potential of −1868 V, compared with the 5000 V s –1 charging rate, indicates partial charge removal during impingement. Moreover, the reflected-flow current retains the same polarity and a similar trend to the surface potential, indicating charges carried away by the impinging flow. Therefore, the net charge on the insulated plate arises from both charge generation and removal, which together determine the steady-state charging behavior under high-speed nanodroplet impingement, revealing a flow-coupled charging in a steady state.

  2. Electrical characteristics of high-speed water nanodroplets under different generation conditions 査読有り

    Jiun-Shian Lee, Siwei Liu, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Takehiko Sato

    International Journal of Plasma Environmental Science and Technology　20　(1)　e01005-e01005/11　2026年5月

    DOI： 10.34343/ijpest.2026.20.e01005 　

  3. Schlieren imagery and velocimetry of electrohydrodynamic heat transfer enhancement in an organic phase change material 査読有り

    Ethan Chariandy, Siwei Liu, Takehiko Sato, Tomoki Nakajima, James S. Cotton

    Journal of Electrostatics　140　104269-104269　2026年3月

    出版者・発行元： Elsevier BV

    DOI： 10.1016/j.elstat.2026.104269 　

    ISSN：0304-3886

  4. Energy-based numerical prediction of electrohydraulic shock wave via a two-stage algorithm 査読有り

    Siwei Liu, Yifu Tang, Yijia Ren, Yong Zhao, Yi Liu, Shudong Yang, Tomoki Nakajima, Takehiko Sato

    Journal of Electrostatics　2026年3月

    DOI： 10.1016/j.elstat.2026.104258 　

  5. ナノ液滴の高速衝突がbiofilm形成 Pseudomonas aeruginosa に与える影響

    田村友梨奈, 河村真人, 中嶋智樹, Liu Siwei, 佐藤匠, 佐藤岳彦, 藤村茂

    日本化学療法学会雑誌　73　(6)　563-571　2025年10月

  6. パルス放電を⽤いた⽔蒸気中の不凝縮性ガスリアルタイム検出

    劉思維, 橘洋司, 中嶋智樹, 佐藤岳彦

    第49回静電気学会全国大会　2025年9月

  7. Mechanism of charge generation by high-speed water nanodroplets impinging on metal surfaces 査読有り

    Jiun-Shian Lee, Takehiko Sato, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Siwei Liu

    Applied Physics Letters　127　(9)　2025年9月1日

    出版者・発行元： AIP Publishing

    DOI： 10.1063/5.0282022 　

    ISSN：0003-6951

    eISSN：1077-3118

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    This study explores the mechanism of charge generation when high-speed water nanodroplets impact metal surfaces. Using a condensation-based nanodroplet generator, we measured the electric potential and current upon droplet collisions with various metals. Results showed a clear dependence on metal type, with charge polarity and magnitude following a descending trend from positive to negative: Pb > Al > Fe > Cu > Sn. The observed trends correspond strongly with the triboelectric series, indicating that triboelectric charging is the primary charge generation mechanism. Other factors, such as electrochemical reactions, thermoelectric effects, wettability, and pre-existing droplet charge, showed limited influence. These findings not only address a fundamental gap in the understanding of droplet-induced electrification at the nanoscale but also lay the groundwork for advanced applications in charge-controlled nanodroplet technologies.

  8. Planar shock-induced bubble collapse and jetting in water captured via x-ray phase contrast imaging 査読有り

    Guillaume T. Bokman, Samuele Fiorini, Jergus Strucka, Bratislav Lukić, Simon N. Bland, Kassim Mughal, Siwei Liu, Alexander Rack, Outi Supponen

    Applied Physics Letters　127　(1)　014102　2025年7月7日

    DOI： 10.1063/5.0272963 　

  9. Real-time detection of non-condensable gas in water vapor systems based on repetitive pulsed discharges for developing in situ probe 査読有り

    Siwei Liu, Yoji Tachibana, Tomoki Nakajima, Takehiko Sato

    Review of Scientific Instruments　96　(7)　2025年7月1日

    出版者・発行元： AIP Publishing

    DOI： 10.1063/5.0255972 　

    ISSN：0034-6748

    eISSN：1089-7623

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    High-temperature, high-pressure steam plays a critical role in industrial applications such as sterilization, power generation, and chemical processing. However, the presence of non-condensable gases (NCGs), such as air, can impede heat transfer, lower vapor pressure, and compromise the efficiency of processes like sterilization. This study proposes a novel real-time detection method for NCGs using a discharge-based probe near a cooling area. By monitoring emission intensities of nitrogen gas (a representative NCG) at a benchmark wavelength of 500 nm, the accumulation and release dynamics of NCGs under varying temperature conditions were analyzed. The experimental results demonstrated that the emission intensity trends correlated with NCG concentration difference caused by condensation, validating the probe’s ability to effectively detect and quantify NCGs. This approach not only enables precise monitoring of steam purity but also offers insights into collecting the NCGs in steam-based processes for enhanced safety and efficiency.

  10. Simulation of thermomechanical process in rock under high-voltage pulses 査読有り

    Yong Zhao, Yi Liu, Hongbin Liao, Jin Cheng, Fuchang Lin, Siwei Liu

    Physica Scripta　100　(6)　065609-065609　2025年5月23日

    出版者・発行元： IOP Publishing

    DOI： 10.1088/1402-4896/add799 　

    ISSN：0031-8949

    eISSN：1402-4896

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    Abstract Rock fragmentation by high-voltage pulsed discharge (RHPD) has gained significant attention in various engineering fields, yet the mechanism of rock fracture induced by the instantaneous high temperature of plasma remains insufficiently quantified. This study establishes a numerical model of thermomechanical damage in rocks under RHPD conditions, analyzes the time evolution of plasma temperature at different fragmentation distances, and proposes a method for calculating the time response of plasma temperature. Based on the discrete element model (DEM), the study simulates the thermal diffusion and thermally induced fracture process inside the rock under the instantaneous high temperature of plasma, revealing the multi-field coupling fracture mechanism induced by high-voltage pulses. The results indicate that plasma-induced high temperatures cause localized mineral particles inside the rock to heat up. However, due to the inherent physical properties of the rock, the range and magnitude of temperature changes remain limited. The bonding between minerals, the presence of voids, and the rock’s low thermal expansion coefficient, low thermal conductivity, and high specific heat capacity collectively result in low heat transfer efficiency, making the effect of transient thermal loading on rock fracture negligible. Even under extreme thermal loading conditions (80000 K, 100 μs), although the range of temperature change increases and a small number of fractures are generated, the contribution of thermomechanical damage remains much smaller than that of shockwave-induced fracturing. The findings of this study enhance the understanding of thermomechanical coupling mechanisms in RHPD and provide a reference for the development of multi-phase medium coupling models.

  11. Influence of Electrode Size on the Fragmentation Process of Rocks with Different Heterogeneities under High-Voltage Pulses 査読有り

    Yong Zhao, Yi Liu, Hongbin Liao, Tianyu Wang, Siwei Liu, Fuchang Lin

    Rock Mechanics and Rock Engineering　58　(3)　3653-3682　2025年1月3日

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

    DOI： 10.1007/s00603-024-04340-4 　

    ISSN：0723-2632

    eISSN：1434-453X

  12. Towards Advanced Control and Application of Charged Cavitation for Biomedicine 招待有り

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    Proceedings of 21st International Conference on Flow Dynamics　2024年11月19日

  13. Impact of high-speed nanodroplets on various pathogenic bacterial cell walls 査読有り

    Yurina Tamura, Masato Kawamura, Takehiko Sato, Tomoki Nakajima, Siwei Liu, Takumi Sato, Shigeru Fujimura

    Journal of Bacteriology　2024年10月9日

    出版者・発行元： American Society for Microbiology

    DOI： 10.1128/jb.00139-24 　

    ISSN：0021-9193

    eISSN：1098-5530

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    ABSTRACT Although the development of disinfection technologies with novel mechanisms has stagnated, we demonstrate the bactericidal effects and mechanisms of high-speed nanodroplet generation technology. The first development of this technology in 2017 gushes out a water droplet of 10 nm in size at 50 m/s; however, the target surface does not become completely wet. Nanodroplets were exposed to biofilm models of Staphylococcus aureus , Pseudomonas aeruginosa , Escherichia coli , and Serratia marcescens . This phenomenon was verified when the nanodroplets collide with the surface of the bacteria at an impact pressure of ~75 MPa. S. aureus was exposed to nanodroplets for 30 seconds at 75 MPa, which exploded the bacterial body and completely sterilized. Eighteen MPa damaged the bacterial surface, causing peptidoglycan leakage. S. aureus was repaired and survives in this state. In contrast, in Gram-negative bacteria, nanodroplets with 18 MPa penetrated some biofilm-forming bacteria but did not hit all of them, and the viable count was not significantly reduced. Although all three bacterial species were completely sterilized at 75 MPa, the disinfectant effect was affected by the biomass of the biofilm formed. In summary, our findings prove that nanodroplets at 18 MPa on the bacterial surface were ineffective in killing bacteria, whereas at 75 MPa, all four bacterial species were completely sterilized. The disinfection mechanism involved a high-velocity collision of nanodroplets with the bacteria, physically destroying them. Our results showed that disinfection using this technology could be an innovative method that is completely different from existing disinfection techniques. IMPORTANCE Although existing disinfection techniques demonstrate bactericidal effects through chemical reactions, concerns regarding human toxicity and environmental contamination have been raised. To the best of our knowledge, this study is the first in the world to reveal that the use of this technology, with nanodroplets of less than 100 nm, can destroy and sterilize bacterial cells by colliding with biofilm-forming bacteria at 75 MPa. Furthermore, because this technology uses only water, it can solve the problems of human toxicity and environmental contamination caused by existing disinfection techniques. Because of its minimal water usage, it can be employed for sanitation worldwide without being limited to specific regions. Our report proposes an unprecedented physical disinfection approach that utilizes a high-speed nanodroplet generation technology.

  14. Charging Phenomena of the High-speed Nanodroplets Impinging on a Copper Plate

    Jiun-Shian Lee, Yun-Chien Cheng, Takuro Okuma, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    17th International Conference on Electrostatic Precipitation (XVII ICESP Japan)　2024年10月

  15. Generation of High-Speed Nanodroplets and the Cleaning Effect

    Nanobubble 2024　2024年10月

  16. 絶縁油中帯電レーザー誘起気泡の特性

    栗原輝太, 劉思維, 中島智樹, Outi Supponen, Mohamed Farha, 佐藤岳彦

    日本機械学会東北支部第60期秋季講演会　2024年9月

  17. Cellular response to plasma-generated electrical and chemical stimulation of equal electricity 査読有り

    Airi Nakayama, Siwei Liu, Ken-ichi Yano, Tomoki Nakajima, Takehiko Sato

    Journal of Physics D: Applied Physics　57　(41)　415202-415202　2024年7月22日

    出版者・発行元： IOP Publishing

    DOI： 10.1088/1361-6463/ad6267 　

    ISSN：0022-3727

    eISSN：1361-6463

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    Abstract Plasma medicine is a novel field of research that has the potential in life sciences, including cancer treatment. It has been believed that all of these potential applications depend on the chemical factor of the plasma. However, the electrical factors that are produced simultaneously with the chemical factors have not been researched thoroughly. To assess the effect of plasma on the response of cells, a system that enables simultaneous comparison of the effects of chemical and electrical factors of plasma with equal electricity was invented. This system separates the polarity of plasma and isolates the chemical species from the electric stimulation. Using this system, HT-1080 cells were exposed to plasma for 10 min, 1 h, and 24 h. The 10 min plasma treatment showed a clear difference in the polarity of plasma, where cells under exposure to positive plasma died while cells in other conditions survived. An hour of plasma treatment affected the cells under the negative plasma, where the cell viability was reduced to half. Meanwhile, the electric stimulation did not affect the cell viability but did alter the cell membrane. Collectively, this study demonstrates the differential effects of three factors (electric factor, positive plasma, negative plasma) under the same condition: both the electrical and chemical effects of plasma-generated stimuli with equal amounts of electricity were successfully observed.

  18. Prediction of plasma path and analysis of axial fracturing properties in rock fragmentation by high-voltage pulsed discharge (RHPD) 査読有り

    Yong Zhao, Yi Liu, Jin Cheng, Hongbin Liao, Tianyu Wang, Fuchang Lin, Siwei Liu

    Journal of Physics D: Applied Physics　57　(32)　325502-325502　2024年5月20日

    出版者・発行元： IOP Publishing

    DOI： 10.1088/1361-6463/ad44a1 　

    ISSN：0022-3727

    eISSN：1361-6463

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    Abstract Rock fragmentation by high-voltage pulsed discharge (RHPD) is widely utilized in resource recovery and energy extraction due to its low energy consumption and high efficiency. However, observing the plasma development process during RHPD presents challenges, and the frequency dependence of dielectric properties further complicates plasma path prediction and the analysis of fracturing properties in the axial direction of the plasma. To address these issues, we analyzed the development properties of plasma within rocks and established a segmented breakdown criterion that considered the propagation velocity of plasma. Additionally, utilizing a transient electromagnetic field model and a particle flow model (PFM), we established a multi-physics field model and proposed a predictive method for the plasma path in a rock–liquid combination environment. This allows for the quantification of the velocity, potential, and length of the plasma. Furthermore, we computed the time response of shock waves and analyzed the loading mechanism of shock waves. Based on the spatial distribution of plasma, the PFM was applied to simulate the fracturing properties of rocks under shock wave loading. Finally, we established a comprehensive experimental platform for RHPD and conducted three-dimensional reconstructions of the fractured area to validate the accuracy of plasma path prediction methods and fracturing properties analysis. This study significantly advances plasma development theory and provides insights for optimizing rock fragmentation efficiency.

  19. The plasma path development model (PPDM) in rocks during rock breaking by high-voltage pulse discharge 査読有り

    Yong Zhao, Yi Liu, Youlai Xu, Tianyu Wang, Siwei Liu, Fuchang Lin

    Current Applied Physics　59　136-152　2024年3月

    出版者・発行元： Elsevier BV

    DOI： 10.1016/j.cap.2024.01.004 　

    ISSN：1567-1739

  20. Plasma Discharge Inside a Laser-Induced Cavitation Bubble

    Siwei Liu, Kaito Nitto, Outi Supponen, Sayaka Kamata, Tomoki Nakajima, Mohamed Farha, Takehiko Sato

    Proceedings of 16th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials　2024年3月

  21. Biofilm形成Staphylococcus aureusに対する高速ナノ液滴技術の殺菌メカニズム

    田村 友梨奈, 河村 真人, 佐藤 匠, 藤村 茂, 佐藤 岳彦, 中嶋 智樹, Liu Siwei

    日本化学療法学会雑誌　72　(1)　112-113　2024年1月

  22. Heat Transfer Enhancement of Phase Change Material under the Application of an Oscillating Electric Field

    Ethan Chariandy, James S. Cotton, Takehiko Sato, Siwei Liu

    Proceedings of Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  23. Production of Laser-induced Bubbles in Water-oil System

    Kota Tachibana, Siwei Liu, Tomoki Nakajima, Kiyonobu Ohtani, Mohamed Farha, Takehiko Sato

    Proceedings of Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  24. Characteristics of High-speed Ultrafine Droplets

    Takehiko Sato, Seiji Kanazawa, Kota Tachibana, Siwei Liu, Tomoki Nakajima

    Proceedings of Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  25. Observation of laser-induced optical breakdown and its application in biomedicine 招待有り

    Siwei Liu, Keisuke Iwasawa, Airi Nakayama, Tomoki Nakajima, Takehiko Sato

    Proceedings of Twentieth International Conference on Flow Dynamics　2023年11月

  26. Effect of charge distribution on the plasma-induced fine bubble dynamics

    Siwei Liu, Outi Supponen, Tomoki Nakajima, Takehiko Sato

    Proceedings of 23rd International Symposium on Advanced Fluid Information　2023年11月

  27. Development of innovative sterilization method by high-speed nanodroplets

    Takehiko Sato, Shigeru Fujimura, Seiji Kanazawa, Yunchen Xiao, Tomoki Nakajima, Siwei Liu

    Proceedings of 7th Taiwan-Japan Workshop on Plasma Life Science and Technology　2023年10月

  28. Analysis of spatial damage characteristics of rock under multiple high-voltage pulse discharges: I. Cross-section characteristics 査読有り

    Yong Zhao, Qin Zhang, Yi Liu, Shijie Huang, Tianyu Wang, Siwei Liu, Fuchang Lin

    Physica Scripta　98　(10)　105603-105603　2023年9月18日

    出版者・発行元： IOP Publishing

    DOI： 10.1088/1402-4896/acf68d 　

    ISSN：0031-8949

    eISSN：1402-4896

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    Abstract Rock breaking by high-voltage pulse discharge (rock breaking by high-voltage pulse discharge, RHPD) is an efficient technology for rock breaking. A single discharge will lead to the initiation or expansion of cracks inside the rock, and the expansion of cracks after multiple discharges will lead to the destabilization of the rock and finally produce a fractured zone. Because of the difficulty in quantifying the spatial damage characteristics of the fractured zone, in this paper, based on the discrete element method and theoretical analysis, the spatial damage model (spatial damage model, SDM) of rock is established. For a typical liquid-solid combination, from the microscopic point of view, the damage characteristics of the fractured zone on the radial cross-section of the plasma are quantified. The changing characteristics of the damage characteristics were analyzed for multiple discharges. In addition, an experimental platform has been built, and the accuracy of the SDM has been verified by the experimental results. The results show that the increase in the discharge distance will improve the deposition energy and crushing effect, and will also improve the accuracy of the model. The findings of this paper provide a technical reserve for the application of RHPD.

  29. ⽔蒸気中の不凝縮ガスリアルタイム計測法の開発

    橘洋司, 劉思維, 中嶋智樹, 忰田正浩, 佐藤岳彦

    第47回静電気学会全国⼤会講演論文集　63-64　2023年9月

  30. Observation and modeling of laser-induced optical breakdown in water

    Siwei Liu, Tomoki NAKAJIMA, Takehiko SATO

    Proceedings of 2023 Annual Meeting of The Institute of Electrostatics Japan　2023年9月

  31. Plasma-based identification of gases in a laser-induced cavitation bubble 査読有り

    Siwei Liu, Kaito Nitto, Outi Supponen, Sayaka Kamata, Tomoki Nakajima, Mohamed Farha, Takehiko Sato

    Applied Physics Letters　123　(9)　094102　2023年9月

    出版者・発行元： AIP Publishing

    DOI： 10.1063/5.0164732 　

    ISSN：0003-6951

    eISSN：1077-3118

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    This study presents a general methodology and an experimental approach to identify the gas components within laser-induced cavitation bubbles. A needle electrode inside the cavitation bubble, which introduces low electric energy into the bubble, produces a homogenous plasma discharge inside the vapor cavity. The primary bubble dynamics remain identical while the rebound bubble becomes about twice as large when a discharge is applied. The effect of non-condensable gases and the electric charge on bubble dynamics is explored theoretically, and the role of the electric charge is found to be significant. Optical emission spectroscopy reveals the evolution of emission lines from gases inside bubbles. H lines and OH lines are persistently observed in all cases, providing a dominant presence of water vapor. The results also confirm that the gases, which are initially present in the water rather than transported from the water, contribute to the optical emission characteristics with different dissolved gases.

  32. Real-time measurement of non-condensable gas in water vapor

    Yoji Tachibana, Siwei Liu, Tomoki Nakajima, Masahiro Kaseda, Takehiko Sato

    Proceedings of International Workshop on Environmental Engineering　2023年7月

  33. 各種院内感染起因菌の環境汚染モデルに対する高速ナノ液滴技術の殺菌効果

    田村 友梨奈, 河村 真人, 佐藤 匠, 藤村 茂, 佐藤 岳彦, 中嶋 智樹, Liu Si-Wei

    日本化学療法学会雑誌　71　(4)　505-505　2023年7月

  34. Plasma-enhanced Degradation of Chlorinated Compounds

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    Proceedings of 25th International Symposium on Plasma Chemistry　2023年5月

  35. Generation of spark-induced bubble and its dependence on conductivity

    Siwei Liu, Yijia Ren, Tomoki Nakajima, Yi Liu, Takehiko Sato

    Proceedings of 7th International Symposium on Plasma & Fine Bubbles　2023年5月

  36. Characteristics of high-speed mist generated by condensation of water vapor in pressurized air 査読有り

    Yunchen Xiao, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    International Journal of Plasma Environmental Science and Technology　16　(3)　e03003　2022年11月

    DOI： 10.34343/ijpest.2022.16.e03003 　

  37. Effect of Plasma-generated Electrical and Chemical Stimulation on HT-1080 Cells

    Airi Nakayama, Tomoki Nakajima, Siwei Liu, Takehiko Sato

    Proceedings of Nineteenth International Conference on Flow Dynamics　409-410　2022年10月

  38. Dynamic damage characteristics of rock under multiple loads during high-voltage pulse fragmentation 査読有り

    Yong Zhao, Yi Liu, Liangli Xiong, Shijie Huang, He Zhang, Tianyu Wang, Siwei Liu, Fuchang Lin

    Journal of Applied Physics　132　(10)　104901-104901　2022年9月14日

    出版者・発行元： AIP Publishing

    DOI： 10.1063/5.0100904 　

    ISSN：0021-8979

    eISSN：1089-7550

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    To analyze the damage characteristics of rocks during high-voltage pulse fragmentation (HVPF), two kinds of loads, shockwave and cavity, are determined by optical observation, and the pressure–time characteristics of these two and their mechanism of damage to rocks in mesoscopic view are analyzed. A model of dynamic damage characteristics of brittle rock under multiple loads is established, which includes numerical calculation and discrete element simulation. In the discrete element simulation, the rock is simplified as a circular region without reflection boundary with a certain size of the circular hole inside, and the grains in the region are discretized as rigid spheres with a definite bonding relationship. The shockwave is considered the time-varying pressure loaded to the grains of the circular hole, and the cavity is considered the quasi-static pressure loaded to the grains on both sides of the fracture. The results of the model show that shear cracks and tensile cracks are produced during the shockwave action, but tensile cracks are predominant. The shockwave acts as a preload for the expansion of cracks, and the damage radius is small. Most of the cracks in HVPF are caused by the cavity. A comparison of the numerical calculation results with the discrete element simulation results shows that the model can describe the distribution characteristics of cracks under multiple loads, which lays a foundation for further analysis of the internal mechanism of HVPF.

  39. Degradation of chlorinated compounds by treatment of repetitive plasma discharges

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    Proceeding for ISNTP-12 and ISEHD 2022　2022年9月

  40. Generation of high-speed mist by condensed water vapor aiming at a novel cleaning technology

    Siwei Liu, Yunchen Xiao, Tomoki Nakajima, Seiji Kanazawa, Takehiko Sato

    Proceedings of 2022 Annual Meeting of The Institute of Electrostatics Japan　101-102　2022年9月

  41. Underwater streamers induced by microsecond pulsed discharge with bi-polarities

    Siwei Liu, Yi Liu, Takehiko Sato

    Proceedings of 2022 Spring Annual Meeting of The Institute of Electrostatics Japan　2022年3月

  42. Application of deep learning for predicting the treatment performance of real municipal wastewater based on one-year operation of two anaerobic membrane bioreactors 査読有り

    Gaoyang Li, Jiayuan Ji, Jialing Ni, Sirui Wang, Yuting Guo, Yisong Hu, Siwei Liu, Sheng-Feng Huang, Yu-You Li

    Science of The Total Environment　813　151920-151920　2022年3月

    出版者・発行元： Elsevier BV

    DOI： 10.1016/j.scitotenv.2021.151920 　

    ISSN：0048-9697

  43. Modeling of spark channel of microsecond pulsed discharge in water

    Siwei Liu, Yi Liu, Takehiko Sato

    Proceeding of The 12th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology(APSPT-12)　2021年12月

  44. Underwater microsecond pulsed discharge influenced by water conductivity

    Siwei Liu, Takehiko Sato, Yi Liu

    Proceedings of The 8th East Asia Joint Symposium on Plasma and Electrostatics Technologies for Environmental Applications　2021年10月

  45. Polarity Effects of Plasma-Induced Stimuli on Cell Viability

    Airi Nakayama, Honoka Taguchi, Chia-Hsing Chang, Tomoki Nakajima, Siwei Liu, Takehiko Sato

    Proceedings of 18th International Conference on Flow Dynamics (ICFD2021)　2021年10月

  46. Simulation and experiment analysis of shock wave induced by underwater pulsed discharge

    Siwei Liu, Yi Liu, Yijia Ren, Takehiko Sato

    Proceedings of 2021 Annual Meeting of The Institute of Electrostatics Japan　29-10　2021年9月21日

  47. Prediction of Cerebral Aneurysm Hemodynamics With Porous-Medium Models of Flow-Diverting Stents via Deep Learning 査読有り

    Gaoyang Li, Xiaorui Song, Haoran Wang, Siwei Liu, Jiayuan Ji, Yuting Guo, Aike Qiao, Youjun Liu, Xuezheng Wang

    Frontiers in Physiology　12　2021年9月17日

    出版者・発行元： Frontiers Media SA

    DOI： 10.3389/fphys.2021.733444 　

    eISSN：1664-042X

    詳細を見る 詳細を閉じる

    The interventional treatment of cerebral aneurysm requires hemodynamics to provide proper guidance. Computational fluid dynamics (CFD) is gradually used in calculating cerebral aneurysm hemodynamics before and after flow-diverting (FD) stent placement. However, the complex operation (such as the construction and placement simulation of fully resolved or porous-medium FD stent) and high computational cost of CFD hinder its application. To solve these problems, we applied aneurysm hemodynamics point cloud data sets and a deep learning network with double input and sampling channels. The flexible point cloud format can represent the geometry and flow distribution of different aneurysms before and after FD stent (represented by porous medium layer) placement with high resolution. The proposed network can directly analyze the relationship between aneurysm geometry and internal hemodynamics, to further realize the flow field prediction and avoid the complex operation of CFD. Statistical analysis shows that the prediction results of hemodynamics by our deep learning method are consistent with the CFD method (error function <13%), but the calculation time is significantly reduced 1,800 times. This study develops a novel deep learning method that can accurately predict the hemodynamics of different cerebral aneurysms before and after FD stent placement with low computational cost and simple operation processes.

  48. Improved one-dimensional “piston” model of electrohydraulic shock wave based on discharge current interception 査読有り

    Yi Liu, Yi-Jia Ren, Si-Wei Liu, Hua Li, Fu-Chang Lin, Yong Zhao

    Journal of Applied Physics　2021年9月7日

    DOI： 10.1063/5.0051267 　

  49. Analysis of cavities characteristics of underwater pulsed current discharge 査読有り

    Liu Yi, Zhao Yong, Ren Yijia, Liu Siwei, Lin Fuchang

    Plasma Sources Science and Technology　2021年8月1日

    DOI： 10.1088/1361-6595/abf857 　

  50. 水蒸気中の不凝縮ガス計測法の開発

    第31回環境工学総合シンポジウム2021講演論文集　306　2021年7月

  51. Influencing factors on microsecond-pulsed discharge mode in water

    Siwei Liu, Takehiko Sato, Yi Liu, Yijia Ren

    Proceedings of 5th International symposium on Application of High-voltage, Plasma & Micro/Nano(Fine) Bubbles to Agriculture, Aquaculture and Food Safety　2021年5月

  52. Mode change of microsecond-pulsed discharge in water

    Siwei Liu, Yi Liu, Yijia Ren, Takehiko Sato

    Proceedings of 2021 Spring Annual Meeting of The Institute of Electrostatics Japan　2021年3月

  53. Experimental observation on characteristics of high-speed mist

    Yunchen Xiao, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    Proceedings of Seventeenth International Conference on Flow Dynamics (ICFD2020)　2020年10月

  54. Liquid discharge characteristics under exposure to ultraviolet-rays for observation of hydrated electron

    Siwei Liu, Yunchen Xiao, Satoshi Uehara, Tomoki Nakajima, Takehiko Sato

    Proceedings of Seventeenth International Conference on Flow Dynamics (ICFD2020)　2020年10月

  55. Influence of conductivities on electrical breakdown of water under microsecond pulsed voltage 査読有り

    Si-Wei Liu, Yi Liu, Yi-Jia Ren, Fu-Chang Lin, Hua Li, Yong Zhao

    Physics of Plasmas　2020年6月

    DOI： 10.1063/5.0005844 　

  56. Analysis of shock wave induced by underwater pulsed discharge using discharge current interception 査読有り

    Si-Wei Liu, Yi Liu, Yi-Jia Ren, Fu-Chang Lin, Hua Li, Yong Zhao

    Journal of Applied Physics　127　(14)　143301-143301　2020年4月14日

    出版者・発行元： AIP Publishing

    DOI： 10.1063/1.5143080 　

    ISSN：0021-8979

    eISSN：1089-7550

  57. Characteristics analysis of electrohydraulic shockwave 査読有り

    Min'gan Wu, Yi Liu, Fuchang Lin, Siwei Liu, Jianjun Sun

    Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams　32　(4)　2020年4月

    DOI： 10.11884/HPLPB202032.190356 　

    ISSN：1001-4322

  58. Comparison and analysis of shockwave characteristics between underwater pulsed discharge and metal wire explosion 査読有り

    Yi Liu, Yi Jia Ren, Si Wei Liu, Fu Chang Lin, Yang Liu, Yin Kuo Shen

    Physics of Plasmas　27　(3)　2020年3月1日

    DOI： 10.1063/1.5140829 　

    ISSN：1070-664X

    eISSN：1089-7674

  59. Determination of the discharge coefficient in improved empirical impedance model of plasma channel for underwater spark discharge 査読有り

    Yi Liu, Yijia Ren, Fuchang Lin, Siwei Liu

    IEEE Transactions on Plasma Science　48　(1)　196-203　2020年1月

    出版者・発行元： Institute of Electrical and Electronics Engineers ({IEEE})

    DOI： 10.1109/TPS.2019.2955247 　

    ISSN：0093-3813

    eISSN：1939-9375

  60. Characteristic analysis of plasma channel and shock wave in electrohydraulic pulsed discharge 査読有り

    Siwei Liu, Yi Liu, Yijia Ren, Fuchang Lin, Yang Liu

    Physics of Plasmas　26　(9)　2019年9月1日

    DOI： 10.1063/1.5092362 　

    ISSN：1070-664X

    eISSN：1089-7674

  61. Effect of conductivity on characteristics of electrohydraulic pulsed discharge

    Siwei Liu, Yi Liu, Yijia Ren, Fuchang Lin

    Proceedings of 6th Chinese Pulsed Power Conference (CPPC)　2019年7月

  62. A method for reducing errors of magnetization modeling of nanocrystalline alloy cores based on modified Jiles-Atherton model 査読有り

    He Zhang, Yi Liu, Siwei Liu, Fuchang Lin

    Journal of Applied Physics　125　(14)　2019年4月

    DOI： 10.1063/1.5086835 　

    ISSN：0021-8979

    eISSN：1089-7550

  63. Enhanced oil recovery by repetitive electrohydraulic shock waves: fracturing and enhanced-permeability 査読有り

    Siwei Liu, Yi Liu, Hua Li, Qin Zhang, Fuchang Lin

    ICHVE 2018 - 2018 IEEE International Conference on High Voltage Engineering and Application　2019年2月13日

    DOI： 10.1109/ICHVE.2018.8642197 　

  64. Simulation of the magnetization process of a gapped magnetic core based on the Jiles-Atherton model 査読有り

    Qin Zhang, He Zhang, Yi Liu, Siwei Liu, Fuchang Lin, Hua Li, Yuan Pan

    Review of Scientific Instruments　90　(2)　2019年2月1日

    DOI： 10.1063/1.5079602 　

    ISSN：0034-6748

    eISSN：1089-7623

  65. Influence of plasma channel impedance model on electrohydraulic shockwave simulation 査読有り

    Siwei Liu, Yi Liu, Yijia Ren, Fuchang Lin, Yang Liu, Yinkuo Shen

    Physics of Plasmas　26　(2)　2019年2月1日

    DOI： 10.1063/1.5064847 　

    ISSN：1070-664X

    eISSN：1089-7674

  66. Effect of electrical breakdown modes on shock wave intensity in water 査読有り

    Siwei Liu, Yi Liu, Zhiyuan Li, Xiandong Li, Guyue Zhou, Hua Li, Fuchang Lin

    IEEE Transactions on Dielectrics and Electrical Insulation　25　(5)　1679-1687　2018年10月

    DOI： 10.1109/TDEI.2018.007027 　

    ISSN：1070-9878

    eISSN：1558-4135

  67. Application of Jiles-Atherton model in description of temperature characteristics of magnetic core 査読有り

    He Zhang, Yi Liu, Siwei Liu, Fuchang Lin

    Review of Scientific Instruments　89　(10)　2018年10月1日

    DOI： 10.1063/1.5050687 　

    ISSN：0034-6748

    eISSN：1089-7623

  68. Influence of electrohydraulic discharge on its application in oil well stimulation 査読有り

    Siwei Liu, Yi Liu, Hua Li, Qin Zhang, Fuchang Lin

    2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018　54-57　2018年6月

    DOI： 10.1109/IPMHVC.2018.8936667 　

  69. Modeling analysis of pulsed magnetization process of magnetic core based on inverse Jiles-Atherton model 査読有り

    Yi Liu, He Zhang, Siwei Liu, Fuchang Lin

    Review of Scientific Instruments　89　(5)　2018年5月1日

    DOI： 10.1063/1.5021069 　

    ISSN：0034-6748

    eISSN：1089-7623

  70. Morphology and development of underwater subsonic streamer under needle to plane electrodes 査読有り

    Xiandong Li, Yi Liu, Guyue Zhou, Siwei Liu, Zhiyuan Li, Fuchang Lin, Yuan Pan

    Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering　38　(5)　1562-1571　2018年3月5日

    DOI： 10.13334/j.0258-8013.pcsee.162434 　

    ISSN：0258-8013

  71. Winding fault diagnosis of power transformer based on finite element analysis 査読有り

    Fei Lu, Lei Jin, Siwei Liu, Yi Liu, Hua Li, Fuchang Lin

    Gaoya Dianqi/High Voltage Apparatus　54　(1)　123-130　2018年1月16日

    DOI： 10.13296/j.1001-1609.hva.2018.01.018 　

    ISSN：1001-1609

  72. Study on underwater subsonic electrical discharges: Streamer morphology and development 査読有り

    Xian Dong Li, Yi Liu, Gu Yue Zhou, Si Wei Liu, Zhi Yuan Li, Zi Jian Li, Qin Zhang, Hua Li, Fu Chang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017-January　1-5　2017年11月29日

    DOI： 10.1109/ICDL.2017.8124703 　

  73. Underwater positive streamer propagation with different insulation modes 査読有り

    Zhiyuan Li, Yi Liu, Siwei Liu, Xiandong Li, Guyue Zhou, Qin Zhang, Hua Li, Fuchang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017-January　1-4　2017年11月29日

    DOI： 10.1109/ICDL.2017.8124688 　

  74. Influence of voltage polarity on intensity of shock waves induced by underwater pulse discharges 査読有り

    Gu Yue Zhou, Yi Liu, Xian Dong Li, Si Wei Liu, Zhi Yuan Li, Zi Jian Li, Fu Chang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017-January　1-5　2017年11月29日

    DOI： 10.1109/ICDL.2017.8124692 　

  75. Effect of electrical breakdown discharge modes on shock wave intensity in water 査読有り

    Siwei Liu, Yi Liu, Xiandong Li, Zhiyuan Li, Guyue Zhou, Qin Zhang, Hua Li, Fuchang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017-January　1-5　2017年11月29日

    DOI： 10.1109/ICDL.2017.8124690 　

    ISSN：1558-4135

  76. Polarity effect variation on electrical breakdown of water under sub-millisecond pulses 査読有り

    Xiandong Li, Yi Liu, Guyue Zhou, Siwei Liu, Zhiyuan Li, Guozhen Gao, Fuchang Lin

    Applied Physics Letters　111　(16)　2017年10月16日

    DOI： 10.1063/1.4994749 　

    ISSN：0003-6951

  77. Fracturing and enhanced-permeability of rocks using shockwaves induced by underwater pulsed discharge 招待有り

    Siwei Liu, Yi Liu, Zhiyuan Li, Hua Li, Fuchang Lin

    Proceedings of 5th Chinese Pulsed Power Conference (CPPC)　2017年8月

  78. Subsonic streamers in water: Initiation, propagation and morphology 査読有り

    X. D. Li, Y. Liu, G. Y. Zhou, S. W. Liu, Z. Y. Li, F. C. Lin

    Journal of Physics D: Applied Physics　50　(25)　2017年6月1日

    DOI： 10.1088/1361-6463/aa6fd7 　

    ISSN：0022-3727

    eISSN：1361-6463

  79. Effect of electrical breakdown discharge modes on shock wave intensity in water 査読有り

    Siwei Liu, Yi Liu, Xiandong Li, Hua Li, Qin Zhang, Fuchang Lin

    Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering　37　(10)　2807-2815　2017年5月20日

    DOI： 10.13334/j.0258-8013.pcsee.170263 　

    ISSN：0258-8013

  80. Intensity improvement of shock waves induced by liquid electrical discharges 査読有り

    Yi Liu, Zhi Yuan Li, Xian Dong Li, Si Wei Liu, Gu Yue Zhou, Fu Chang Lin

    Physics of Plasmas　24　(4)　2017年4月

    DOI： 10.1063/1.4980848 　

    ISSN：1070-664X

    eISSN：1089-7674

  81. Diagnosis of transformer winding faults based on FEM simulation and on-site experiments 査読有り

    Siwei Liu, Yi Liu, Hua Li, Fuchang Lin

    IEEE Transactions on Dielectrics and Electrical Insulation　23　(6)　3752-3760　2016年12月

    DOI： 10.1109/TDEI.2016.006008 　

    ISSN：1070-9878

  82. Influence of deposited energy on shock wave induced by underwater pulsed current discharge 査読有り

    Xian Dong Li, Yi Liu, Si Wei Liu, Zhi Yuan Li, Gu Yue Zhou, Hua Li, Fu Chang Lin, Yuan Pan

    Physics of Plasmas　23　(10)　2016年10月1日

    DOI： 10.1063/1.4964663 　

    ISSN：1070-664X

    eISSN：1089-7674

  83. Fault diagnosis method of power transformer winding axial displacement 査読有り

    Fei Lu, Lei Jin, Ling Ruan, Siwei Liu, Yi Liu

    Gaodianya Jishu/High Voltage Engineering　42　(9)　2916-2921　2016年9月30日

    DOI： 10.13336/j.1003-6520.hve.20160907029 　

    ISSN：1003-6520

  84. General diagnosis of transformer winding axial displacement faults based on FEM simulation and on-site experiments 査読有り

    Fei Lu, Lei Jin, Siwei Liu, Yi Liu, Hua Li, Fuchang Lin

    34th Electrical Insulation Conference, EIC 2016　223-228　2016年8月22日

    DOI： 10.1109/EIC.2016.7548700 　

  85. Pulse magnetization characteristics of Fe-based nanocrystalline cores with different remanences 査読有り

    Yi Liu, Yibo Han, Siwei Liu, Fuchang Lin

    Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering　36　(2)　577-584　2016年1月20日

    DOI： 10.13334/j.0258-8013.pcsee.2016.02.032 　

    ISSN：0258-8013

  86. Pulse magnetic properties measurement and characterization of Fe-based nanocrystalline cores for high-voltage pulse magnetics applications 査読有り

    Yi Liu, Yibo Han, Siwei Liu, Fuchang Lin

    IEEE Transactions on Power Electronics　30　(12)　6883-6896　2015年12月1日

    DOI： 10.1109/TPEL.2014.2386916 　

    ISSN：0885-8993

  87. Analysis of the influence of load on the transfer characteristics of capacitive voltage transformer

    Shuang Liao, Yi Liu, Guyue Zhou, Siwei Liu, Fuchang Lin

    Proceedings of the 2015 Academic Annual Conference of the High Voltage Professional Committee of the Chinese Society of Electrical Engineering　2015年10月

  88. Fault diagnosis of axial displacement of power transformer based on finite element model and frequency response method

    Fei Lu, Lei Jin, Ling Ruan, Siwei Liu, Yi Liu. Hua Li, Fuchang Lin

    Proceedings of the 2015 Academic Annual Conference of the High Voltage Professional Committee of the Chinese Society of Electrical Engineering　2015年10月

  89. Structural fault diagnosis of power transformer based on finite element analysis

    Siwei Liu, Yi Liu. Hua Li, Fuchang Lin, Fei Lu, Kai Zhou

    Proceedings of the 2015 Academic Annual Conference of the High Voltage Professional Committee of the Chinese Society of Electrical Engineering　2015年10月

  90. Loss and permeability characterization of Fe-based nanocrystalline cores for pulsed power magnetic applications 査読有り

    Yi Liu, Yibo Han, Siwei Liu, Fuchang Lin

    Proceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014　595-598　2015年10月1日

    DOI： 10.1109/IPMHVC.2014.7287346 　

  91. Optimization design of a repetitive nanosecond pulse generator based on saturable pulse transformer and magnetic switch 査読有り

    Yi Liu, Siwei Liu, Yibo Han, Yafeng Ge, Qin Zhang, Fuchang Lin

    IEEE Transactions on Plasma Science　43　(9)　3277-3285　2015年9月1日

    DOI： 10.1109/TPS.2015.2459102 　

    ISSN：0093-3813

  92. Study on the measurement of pulse magnetization characteristics of toroidal magnetic cores 査読有り

    Yibo Han, Yi Liu, Siwei Liu, Fuchang Lin

    Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering　35　(16)　4239-4246　2015年8月20日

    DOI： 10.13334/j.0258-8013.pcsee.2015.16.028 　

    ISSN：0258-8013

︎全件表示 ︎最初の5件までを表示

MISC 3

  1. 高速ナノ液滴が拓く新しい水利用社会

    佐藤岳彦, 藤村茂, 金澤誠司, 立花孝介, 李俊賢, 肖昀晨, 中嶋智樹, 杉本俊之, 鄭雲謙, 劉思維

    金属　95　(12)　29-35　2025年12月

  2. 電気的に等量のプラズマが生成する化学および電気刺激に対する細胞応答

    中山愛理, 劉思維, 矢野憲一, 中嶋智樹, 佐藤岳彦

    クリーンテクノロジー　35　(2)　17-20　2025年2月

  3. 高速ナノ液滴が拓く「超節水・薬剤フリー・濡れない」殺菌・洗浄 招待有り

    佐藤岳彦, 劉思維, 中嶋智樹, 肖昀晨, 藤村茂, 金澤誠司

    クリーンテクノロジー　33　(9)　40-43　2023年9月

講演・口頭発表等 57

  1. Mie散乱理論の散乱光特性の考察

    佐藤奨, Siwei Liu, 立花孝介, 大熊拓郎, 佐藤岳彦

    日本機械学会東北支部第61期総会・講演会　2026年3月16日

  2. Flow Dynamics of Non-Condensable Gases in Water Vapor near Cooling Surfaces

    Siwei Liu, Yoji Tachibana, Tomoki Nakajima, Takehiko Sato

    14th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT-14)　2025年12月13日

  3. Electrical Characteristics of Water High-speed Nanodroplet Impacts

    Jiun-Shian Lee, Takehiko Sato, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Siwei Liu

    The 22nd International Conference on Flow Dynamics (ICFD2025)　2025年11月10日

  4. Exploring the Characteristics and Biomedical Applications of Charged Cavitation 招待有り

    Siwei Liu, Takehiko Sato, Outi Supponen, Mohamed Farha, Tomoki Nakajim

    The 22nd International Conference on Flow Dynamics (ICFD2025)　2025年11月11日

  5. Effect of Dissolved Gas on Cavitation Bubble Dynamics

    Davide Bernardo Preso, Giancarlo Cravotto, Siwei Liu

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  6. Schlieren Imagery of Low Frequency AC Voltage EHD of Phase Change Materials

    Ethan Chariandy, James S. Cotton, Takehiko Sato, Siwei Liu

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  7. Characteristics of the Plasma-Affected Cavitation Bubble Dynamics

    Siwei Liu, Outi Supponen, Takehiko Sato, Mohamed Farha, Tomoki Nakajima, Kaito Nitto, Kota Kurihara

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  8. Observation and Modeling for Plasma-Dependent Interface

    Siwei Liu, Kosuke Tachibana, Satoshi Uchida, Tomoki Nakajima, Takehiko Sato

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  9. Charging Phenomena of High-speed Nanodroplets on Various Metal Plates

    Jiun-Shian Lee, Yun-Chien Cheng, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  10. Measurement of the Characteristics of Impinging High-Speed Water Nanodroplets

    Takehiko Sato, Seiji Kanazawa, Siwei Liu, Tomoki Nakajima, Takuro Okuma, Kosuke Tachibana

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  11. Generation of Charged Cavitation Bubbles and Their Characteristics

    Takehiko Sato, Mohamed Farha, Sayaka Kamata, Kiyonobu Ohtani, Tomoki Nakajima, Siwei Liu

    The 25th International Symposium on Advanced Fluid Information (AFI-2025)　2025年11月12日

  12. パルス放電を⽤いた⽔蒸気中の不凝縮性ガスリアルタイム検出

    劉思維, 橘洋司, 中嶋智樹, 佐藤岳彦

    第49回静電気学会全国大会　2025年9月

  13. Investigation of Underwater Discharge Phenomena and Shock Wave Regulation

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    XI International Symposium on Electrohydrodynamics 2025 (ISEHD2025)　2025年6月13日

  14. Charged Phenomenon of High-Speed Nanodroplet Impact on the Copper Plate

    Jiun-Shian Lee, Yun-Chien Cheng, Toshiyuki Sugimoto, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    XI International Symposium on Electrohydrodynamics 2025 (ISEHD2025)　2025年6月12日

  15. Visualization of Electrohydrodynamic Convection Cells in a Phase Change Material Using Schlirien Imagery

    Ethan Chariandy, Siwei Liu, Takehiko Sato, James Cotton

    XI International Symposium on Electrohydrodynamics 2025 (ISEHD2025)　2025年6月11日

  16. Towards Advanced Control and Application of Charged Cavitation for Biomedicine 招待有り

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    21st International Conference on Flow Dynamics　2024年11月19日

  17. Generation of High-Speed Nanodroplets and the Cleaning Effect

    Nanobubble 2024　2024年10月

  18. Charging Phenomena of the High-speed Nanodroplets Impinging on a Copper Plate

    Jiun-Shian Lee, Yun-Chien Cheng, Takuro Okuma, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    17th International Conference on Electrostatic Precipitation (XVII ICESP Japan)　2024年10月

  19. Gas Component Identification for Laser-Induced Cavitation Bubbles

    Siwei Liu, Kaito Nitto, Outi Supponen, Tomoki Nakajima, Mohamed Farhate, Takehiko Sato

    The 51st IEEE International Conference on Plasma Science & The 4th Asia-Pacific Conference on Plasma and Terahertz Science (ICOPS & APCOPTS 2024)　2024年6月19日

  20. 微粒子の散乱光分光

    大熊拓郎, 劉思維, 中嶋智樹, 金澤誠司, 佐藤岳彦

    日本機械学会東北支部第59期総会・講演会　2024年3月15日

  21. Plasma Discharge Inside a Laser-Induced Cavitation Bubble

    Siwei Liu, Kaito Nitto, Outi Supponen, Sayaka Kamata, Tomoki Nakajima, Mohamed Farha, Takehiko Sato

    16th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials　2024年3月7日

  22. Characteristics of High-speed Ultrafine Droplets

    Takehiko Sato, Seiji Kanazawa, Kota Tachibana, Siwei Liu, Tomoki Nakajima

    Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  23. Production of Laser-induced Bubbles in Water-oil System

    Kota Tachibana, Siwei Liu, Tomoki Nakajima, Kiyonobu Ohtani, Mohamed Farha, Takehiko Sato

    Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  24. Heat Transfer Enhancement of Phase Change Material under the Application of an Oscillating Electric Field

    Ethan Chariandy, James S. Cotton, Takehiko Sato, Siwei Liu

    Twenty-third International Symposium on Advanced Fluid Information　2023年11月

  25. Effect of charge distribution on the plasma-induced fine bubble dynamics

    Siwei Liu, Outi Supponen, Tomoki Nakajima, Takehiko Sato

    23rd International Symposium on Advanced Fluid Information　2023年11月

  26. Observation of laser-induced optical breakdown and its application in biomedicine 招待有り

    Siwei Liu, Keisuke Iwasawa, Airi Nakayama, Tomoki Nakajima, Takehiko Sato

    20th International Conference on Flow Dynamics　2023年11月

  27. Development of innovative sterilization method by high-speed nanodroplets

    Takehiko Sato, Shigeru Fujimura, Seiji Kanazawa, Yunchen Xiao, Tomoki Nakajima, Siwei Liu

    7th Taiwan-Japan Workshop on Plasma Life Science and Technology　2023年10月

  28. 水蒸気中の不凝縮ガスリアルタイム計測法の開発

    橘洋司, 劉思維, 中嶋智樹, 忰田正浩, 佐藤岳彦

    第47回静電気学会全国大会　2023年9月11日

  29. Observation and modeling of laser-induced optical breakdown in water

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    2023 Annual Meeting of The Institute of Electrostatics Japan　2023年9月

  30. Real-time measurement of non-condensable gas in water vapor

    Yoji Tachibana, Siwei Liu, Tomoki Nakajima, Masahiro Kaseda, Takehiko Sato

    International Workshop on Environmental Engineering　2023年7月

  31. Generation of spark-induced bubble and its dependence on conductivity

    Siwei Liu, Yijia Ren, Tomoki Nakajima, Yi Liu, Takehiko Sato

    7th International Symposium on Plasma & Fine Bubbles　2023年5月

  32. Plasma-enhanced Degradation of Chlorinated Compounds

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    25th International Symposium on Plasma Chemistry　2023年5月

  33. Effect of Plasma-generated Electrical and Chemical Stimulation on HT-1080 Cells

    Airi Nakayama, Tomoki Nakajima, Siwei Liu, Takehiko Sato

    19th International Conference on Flow Dynamics　2022年10月

  34. Generation of high-speed mist by condensed water vapor aiming at a novel cleaning technology

    Siwei Liu, Yunchen Xiao, Tomoki Nakajima, Seiji Kanazawa, Takehiko Sato

    2022 Annual Meeting of The Institute of Electrostatics Japan　2022年9月

  35. Degradation of chlorinated compounds by treatment of repetitive plasma discharges

    Siwei Liu, Tomoki Nakajima, Takehiko Sato

    ISNTP-12 and ISEHD 2022　2022年9月

  36. Underwater streamers induced by microsecond pulsed discharge with bi-polarities

    Siwei Liu, Yi Liu, Takehiko Sato

    2022 Spring Annual Meeting of The Institute of Electrostatics Japan　2022年3月1日

  37. Modeling of spark channel of microsecond pulsed discharge in water

    Siwei Liu, Yi Liu, Takehiko Sato

    The 12th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology　2021年12月11日

  38. Polarity Effects of Plasma-Induced Stimuli on Cell Viability

    Airi Nakayama, Honoka Taguchi, Chia-Hsing Chang, Tomoki Nakajima, Siwei Liu, Takehiko Sato

    18th International Conference on Flow Dynamics (ICFD2021)　2021年10月29日

  39. Underwater microsecond pulsed discharge influenced by water conductivity

    Siwei Liu, Takehiko Sato, Yi Liu

    The 8th East Asia Joint Symposium on Plasma and Electrostatics Technologies for Environmental Applications　2021年10月20日

  40. Simulation and experiment analysis of shock wave induced by underwater pulsed discharge

    Siwei Liu, Yi Liu, Yijia Ren, Takehiko Sato

    2021 Annual Meeting of The Institute of Electrostatics Japan　2021年9月21日

  41. Visualization and analysis of underwater plasma inception and propagation 招待有り

    Siwei Liu

    2021 IEEE 4th International Electrical and Energy Conference　2021年5月30日

  42. Influencing factors on microsecond-pulsed discharge mode in water

    Siwei Liu, Takehiko Sato, Yi Liu, Yijia Ren

    5th International symposium on Application of High-voltage, Plasma & Micro/Nano(Fine) Bubbles to Agriculture, Aquaculture and Food Safety　2021年5月13日

  43. Mode change of microsecond-pulsed discharge in water

    Siwei Liu, Yi Liu, Yijia Ren, Takehiko Sato

    2021 Spring Annual Meeting of The Institute of Electrostatics Japan　2021年3月2日

  44. Liquid discharge characteristics under exposure to ultraviolet-rays for observation of hydrated electron

    Siwei Liu, Yunchen Xiao, Satoshi Uehara, Tomoki Nakajima, Takehiko Sato

    Seventeenth International Conference on Flow Dynamics (ICFD2020)　2020年10月30日

  45. Experimental observation on characteristics of high-speed mist

    Yunchen Xiao, Siwei Liu, Tomoki Nakajima, Takehiko Sato

    Seventeenth International Conference on Flow Dynamics (ICFD2020)　2020年10月29日

  46. Effect of conductivity on characteristics of electrohydraulic pulsed discharge

    Liu Siwei, Liu Yi, Ren Yijia, Lin Fuchang

    6th Chinese Pulsed Power Conference (CPPC)　2019年7月

  47. Enhanced oil recovery by repetitive electrohydraulic shock waves: fracturing and enhanced-permeability

    Siwei Liu, Yi Liu, Hua Li, Qin Zhang, Fuchang Lin

    2018 IEEE International Conference on High Voltage Engineering and Application　2019年2月13日

  48. Influence of electrohydraulic discharge on its application in oil well stimulation

    Siwei Liu, Yi Liu, Hua Li, Qin Zhang, Fuchang Lin

    2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018　2018年6月

  49. Underwater positive streamer propagation with different insulation modes

    Zhiyuan Li, Yi Liu, Siwei Liu, Xiandong Li, Guyue Zhou, Qin Zhang, Hua Li, Fuchang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017年11月29日

  50. Study on underwater subsonic electrical discharges: Streamer morphology and development

    Xian Dong Li, Yi Liu, Gu Yue Zhou, Si Wei Liu, Zhi Yuan Li, Zi Jian Li, Qin Zhang, Hua Li, Fu Chang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017年11月29日

  51. Effect of electrical breakdown discharge modes on shock wave intensity in water

    Siwei Liu, Yi Liu, Xiandong Li, Zhiyuan Li, Guyue Zhou, Qin Zhang, Hua Li, Fuchang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017年11月29日

  52. Influence of voltage polarity on intensity of shock waves induced by underwater pulse discharges

    Gu Yue Zhou, Yi Liu, Xian Dong Li, Si Wei Liu, Zhi Yuan Li, Zi Jian Li, Fu Chang Lin

    2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017　2017年11月29日

  53. Fracturing and enhanced-permeability of rocks using shockwaves induced by underwater pulsed discharge 招待有り

    Siwei Liu, Yi Liu, Zhiyuan Li, Hua Li, Fuchang Lin

    5th Chinese Pulsed Power Conference (CPPC)　2017年8月17日

  54. General diagnosis of transformer winding axial displacement faults based on FEM simulation and on-site experiments

    Fei Lu, Lei Jin, Siwei Liu, Yi Liu, Hua Li, Fuchang Lin

    34th Electrical Insulation Conference, EIC 2016　2016年8月22日

  55. Loss and permeability characterization of Fe-based nanocrystalline cores for pulsed power magnetic applications

    Yi Liu, Yibo Han, Siwei Liu, Fuchang Lin

    Proceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014　2015年10月1日

  56. 金属板に衝突する高速ナノ液滴の帯電特性

    Jiun-Shian Lee, Siwei Liu, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Takehiko Sato

    第27回静電気学会春期講演会　2026年3月9日

  57. Contact Electrification of High-speed Nanodroplets Impinging on Various Metal Plates under Different Generation Conditions

    Jiun-Shian Lee, Siwei Liu, Yun-Chien Cheng, Toshiyuki Sugimoto, Tomoki Nakajima, Takehiko Sato

    ELyT Workshop　2026年3月7日

︎全件表示 ︎最初の5件までを表示

産業財産権 12

  1. 水力電気パルス増加装置に基づいて変圧器パラメータを取得する方法

    Liu Yi, Zhang He, Liu Siwei, Lin Fuchang

    特許CN 110111987 B

    産業財産権の種類: 特許権

  2. 変圧器コアの磁気特性を測定するための方法および装置

    Liu Yi, Zhang He, Liu Siwei, Lin Fuchang

    特許CN 109884564 B

    産業財産権の種類: 特許権

  3. 広帯域過渡電圧測定装置の校正および補償方法

    Liu Yi, Liu Siwei, Lin Fuchang, Su Shaochun, Xie Shijun, Long Zhaozhi, Li Wenting, Song Xiaolin, Liang Pan, Ma Ye

    特許CN 109782206 B

    産業財産権の種類: 特許権

  4. 水力パルス法に基づくプロアントシアニジンの補助抽出装置

    Liu Yi, Zhou Guyue, Liu Yang, Ren Yijia, Lin Fuchang, Liu Siwei

    特許CN 108654537 B

    産業財産権の種類: 特許権

  5. 電気油圧式パルス衝撃波と化学薬品増強注入に基づく石油とガスの生産刺激装置と方法

    Liu Yi, Liu Siwei, Lin Fuchang, Li Xiandong, Li Zhiyuan

    特許CN 108049852 B

    産業財産権の種類: 特許権

  6. 高静圧下での水力電気パルス衝撃波トランスミッターの故障前時間遅延制御法

    Liu Yi, Liu Siwei, Zhou Guyue, Lin Fuchang

    特許CN 107633840 B

    産業財産権の種類: 特許権

  7. 高い静圧下での水力電気パルスの衝撃波強度を取得する方法

    Liu Yi, Zhou Guyue, Liu Siwei, Lin Fuchang

    特許CN 107576843 B

    産業財産権の種類: 特許権

  8. 水力パルス衝撃波発生器

    Liu Yi, Li Zhiyuan, Lin Fuchang, Liu Siwei, Zhou Guyue

    特許CN 107321586 B

    産業財産権の種類: 特許権

  9. Pipeline descaling and rock stratum fracturing device based on electro-hydraulic pulse shock waves

    Liu Yi, Lin Fuchang, Pan Yuan, Zhang Qin Li Hua, Li Zhiyuan, Li Hua, Liu Siwei

    特許US 10400567 B2

    産業財産権の種類: 特許権

  10. 水力電気パルス衝撃波に基づくパイプライン洗浄および岩石破砕装置

    Liu Yi, Lin Fuchang, Pan Yuan, Zhang Qin, Li Hua, Li Zhiyuan, Liu Siwei

    特許CN 107869342 B

    産業財産権の種類: 特許権

  11. 変圧器の構造的故障診断のための多属性の包括的な方法

    Lu Fei, Shi Tianru, Jin Lei, Zhou Kai, Liu Siwei, Liu Yi, Li Hua, Lin Fuchang

    特許CN 105488270 B

    産業財産権の種類: 特許権

  12. 容量性電圧変換器の試験方法

    Liu Yi, Zhou Guyue, Liao Shuang, Lin Fuchang, Liu Siwei

    特許CN 105277913 B

    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 5

  1. 準液滴の科学：水の転成が生む混沌と秩序

    佐藤 岳彦, 由井 宏治, 谷垣 実, 原田 慈久, 藤村 茂, 伊賀 由佳, 小林 一道, 立花 孝介, 劉 思維, 宮原 高志

    2025年4月 ～ 2030年3月

  2. Towards Advanced Control and Alteration of Charged Cavitation for Biomedicine: Dynamical Adjusting and Product Selection

    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 Early-Career Scientists

    研究機関：Tohoku University

    2025年4月1日 ～ 2027年3月31日

  3. Advanced imaging and modeling of plasma-coupled fine bubble for optimization of solvated electron source

    劉 思維

    2023年4月 ～ 2027年3月

  4. 帯電気泡崩壊圧縮による革新的ナノ秒パルスＸ線が拓くがん細胞転移抑制

    佐藤 岳彦, 劉 思維, 宮原 高志

    2023年6月 ～ 2026年3月

  5. Exploring availability of plasma-induced solvated electrons: formation and transport

    劉 思維

    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 Early-Career Scientists

    研究機関：Tohoku University

    2022年4月 ～ 2025年3月

    詳細を見る 詳細を閉じる

    This project innovatively proposes the plasma flow in the liquid as a potential high-effective source for solvated electrons. In order to elucidate the coupling mechanism between solvated electrons and plasma flow, it is a severe challenge to directly observe solvated electrons due to the super activity and short lifetime of solvated electrons. In FY 2022, dechlorination was selected as an indicator of solvated electrons in the experiment. The results confirm the generation of chloride ions which remained in the target solution with a useable mass concentration that eventually increases exponentially when the treatment time increase. These results validate the potential for monitoring the distribution of solvated in the solution by specific indicators. In the next step, the flow behavior caused by the concertation difference would be studied and discussed. By combining a streak camera and a spectrometer, it is possible to resolve the spectral characteristics of plasma flow into continuous time sequences. The time-resolved spectra at the gas-liquid interface were successfully achieved with a temporal resolution of less than 1 microsecond and a wavelength resolution of 5.3 nm. Two main bands of light emission can be recognized, which correspond to the instants of the voltage application and reverse. The contents of wavelengths for the two bands show no difference, however, the total intensity, as well as the width, changes significantly. The results highlight the origin of the solvated electrons from plasma flow rather than the accumulation of charge in the liquid.

社会貢献活動 1

  1. 片平まつり2021

    2021年10月9日 ～

学術貢献活動 2

  1. Co-organizer, Session Chair, 25th International Symposium on Advanced Fluid Information (AFI2025)

    2025年11月10日 ～ 2025年11月13日

    学術貢献活動種別: 大会・シンポジウム等

  2. Session Organizer, Session Chair, 22nd International Conference on Flow Dynamics (ICFD2025)

    2025年11月10日 ～ 2025年11月13日

    学術貢献活動種別: 大会・シンポジウム等