Abstract
We summarize recent experiments on thermal counterflow turbulence in superfluid He-4, emphasizing the observation of turbulence in the normal fluid and its effect on the decay process when the heat flux is turned off. We argue that what is observed as turbulence in the normal fluid is a novel form of coupled turbulence in the superfluid and normal components, with injection of energy on the scales of both the (large) channel width and the (small) spacing between quantized vortices. Although an understanding of this coupled turbulence remains challenging, a theory of its decay is developed which accounts for the experimental observations.
| Original language | English |
|---|---|
| Pages (from-to) | 648-652 |
| Number of pages | 5 |
| Journal | JETP Letters |
| Volume | 103 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - May 2016 |
Bibliographical note
L.S. and E.V. acknowledge the support of the Czech Science Foundation (grant no. GAČR 203/14/02005S). J.G. and W.G. acknowledge the support of the U.S. Department of Energy (grant no. DEFG02 96ER40952) and the National Science Foundation (grant no. DMR-1507386). V.L. and A.P. acknowledge kind hospitality of Charles University in Prague that made their contribution to this project possible. This work was partially supported by the European Commission (grant agreement no. 312778, European High-Performance Infrastruce.All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)