PIV measurement study of fully developed superfluid turbulent thermal counterflow jet

被引：1
|
作者：
Murakami, M. [1 ]
Takakoshi, T. [1 ]
Yokota, N. [1 ]
Tsukahara, R. [1 ]
机构：
[1] Univ Tsukuba, Grad Sch Syst & Informat Engn, Tsukuba, Ibaraki 3058573, Japan
来源：
25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 3: QUANTUM GASES LIQUIDS AND SOLIDS | 2009年 / 150卷
关键词：
HE-II; PARTICLE; HELIUM;
D O I：
10.1088/1742-6596/150/3/032069
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The particle image velocimetry (PIV) technique was successfully applied for measuring the normal component velocity of a He II thermal counterflow jet. Neutrally buoyant hydrogen-deuterium solid particles were used as tracer particles for the PIV measurement. The jet velocity profiles and the decay properties were investigated for the cases of small and large normal component velocities, and were compared with those of fully developed turbulent round jets of ordinary viscous fluids. The velocity measured near the jet nozzle exit was compared with the theoretical prediction for the normal component velocity, U-n,U-theo. It is found the ratio of the PIV velocity to U-n,U-theo is smaller than unity at any temperatures irrespectively of U-n,U-theo
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页数：4
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