Low Temperature Physics: 42, 717 (2016); https://doi.org/10.1063/1.4961657
Fizika Nizkikh Temperatur: Volume 42, Number 8 (August 2016), p. 909-912    ( to contents , go back )

Influence of Kapitza resistance on the stationary nonequilibrium states establishment in superfluid 3He–4He mixtures

T.G. Vihtinskaya, K.E. Nemchenko, and S.Yu. Rogova

V. N. Karazin National University, Kharkiv 61077, Ukraine
E-mail: nemchenko@bk.ru

Received May 1, 2016

Abstract

The nonequilibrium steady states establishment when the heat flow is turned on in superfluid mixtures with a sufficiently high concentration 9.8% of 3He is considered. We investigate influence of possible relaxation mechanisms, in particular the Kapitza jump on the process of establishing a constant temperature gradient. From a comparison of theoretical calculations and experimental data thermal diffusivity coefficient, thermal conductivity coefficient, and Kapitsa coefficient are found. It is shown that the Kapitza jump accounting is necessary for a quantitative description of the experimental data.

PACS: 67.60.–g Mixtures of 3He and 4He;
PACS: 67.25. bf Transport, hydrodynamics.

Key words: superfluid mixtures, Kapitza jump, thermal conductivity.

Published online: June 24, 2016

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