Non-planar and non-linear second sound waves in He II.

作者：Zhang, P^*; Kimura, S; Murakami, M; Wang, RZ

来源：Chinese Physics Letters, 2000, 17(1): 43-45.

DOI：10.1088/0256-307X/17/1/015

Non-plasma 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;md 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.

• 出版日期2000
• 单位上海交通大学; 中国地震局工程力学研究所