Interaction between small particle and quantum vortex from the view point of pressure statistics

• Project/Area Number: 26630050
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Nagoya University
• Principal Investigator: TSUJI Yoshiyuki 名古屋大学, 工学(系)研究科(研究院), 教授 (00252255)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 流体工学 / 量子乱流 / 量子渦 / 超流動 / 変動圧力

Outline of Final Research Achievements

The visualization of quantum vortex in super fluid was performed using the small Hydrogen particles. The motions of quantum vortex can be successfully observed by the present visualization system. Particle Lagrange velocity and acceleration was computed by analyzing the particle trajectories. And the interaction between the vortex and small particles are discussed. It was found that the static pressure fluctuation in quantum turbulence can be measured but there are several problems to be solved for the accurate measurement in the next stage. One of the most significant problems is the background noise, which is caused by free surface waves and they should be decreased.

Research Products

• [Presentation] 量子渦の可視化と量子乱流中の粒子挙動 (2016)
  • Author(s): 辻 義之
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-20
  • Invited
• [Presentation] 量子乱流中の微細粒子の運動について (2016)
  • Author(s): 辻 義之
  • Organizer: 物性研究所短期研究集会「量子乱流と古典乱流の邂逅」
  • Place of Presentation: 東京大学大学物性研究所
  • Year and Date: 2016-01-05
  • Invited
• [Presentation] Lagrangian property of particle motions in He4 (2015)
  • Author(s): Yoshiyuki Tsuji
  • Organizer: Interpretation of measurements in superfluid turbulence
  • Place of Presentation: Saclay, France
  • Year and Date: 2015-09-14
  • Int'l Joint Research / Invited
• [Presentation] On the particle motions in quantum turbulence (2014)
  • Author(s): Yoshiyuki Tsuji
  • Organizer: Workshop on New Perspectives in Quantum Turbulence:
  • Place of Presentation: Nagoya University, Japan
  • Year and Date: 2014-12-11 – 2014-12-12
• [Presentation] The Effect of Quantized Vortices on Particle Motion in Superfluid Helium (2014)
  • Author(s): Akira Hirano, Daiki Kato, Ryouhei Ohtaka, Akifumi Iwamoto, Takahiro Ito, Yoshiyuki Ｔｓｕｊｉ
  • Organizer: American Physical Society 67th annual DFD meeting
  • Place of Presentation: San Francisco, California(USA)
  • Year and Date: 2014-11-23 – 2014-11-25