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Non-planar and Non-linear Second Sound Waves in He II |
| ZHANG Peng1;KIMURA Seiji2;MURAKAMI Masahide2;WANG Ru-zhu1
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| 1Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200030
2Institute of Engineering Mechanics and Systems, University of Tsukuba, Tsukuba-city, 305-8573, Japan
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| Cite this article: |
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ZHANG Peng, KIMURA Seiji, MURAKAMI Masahide et al 2000 Chin. Phys. Lett. 17 43-45 |
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Abstract Non-planar and non-linear second sound wave are experimentally investigated in an open He II bath. It is found that second sound wave characterized by a negative tail part in an open He II bath is different from that propagating through a channel, and the shape of the negative tail part of second sound wave varies at different location in an open He II bath. Theoretical consideration is also carried out based on two-fluid model and vortex evolution equation. It is found that experimental and theoretical results agree rather well with each other. Second sound wave may develop into the thermal shock wave provided that the heat flux is large.
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| Keywords:
67.40.Pm
43.25.+d
67.40.Vs
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Published: 01 January 2000
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