QFS 2016 Book of Abstracts

Abstracts

O3.1 Lagrange trajectory of small particles in super fluid HeII Wataru Kubo and Yoshiyuki Tsuji Nagoya University, Department of Energy Engineering and Science, Nagoya city Japan 464-8603 Small tracer parties in HeII are visualized and their motions are analyzed. The particles are made of solid hydrogen whose diameter is an order of micron. In a counter flow, changing the heat flux and bath temperature, Lagrange velocity and accelerations are computed by analyzing the visualized images through PTV technique. We studied how the particle sizes affect the statistics of particle motions. The probability density functions of acceleration shows nearly stretched exponential shape. But the tail part is significantly affected by the particle sizes. These are similar characteristics in classical turbulence. We compared the detail of them and discuss their property.

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