Counterflow energy spectra of quantum turbulence at finite temperatures

V. A. Andryushchenko, L. P. Kondaurova

Research output: Contribution to journalArticlepeer-review

Abstract

The spectrum of the energy generated by the vortex tangle in counterflow of normal and superfluid components at different temperatures was obtained. The counterflow magnitude was varied from 0.3 cm/s to 1.2 cm/s and the temperature was varied from 1.3 K to 1.9 K. It was shown that E(k) ∼ k at intervortex scale, where 1.3 < α < 1.4 depending on the temperature. At larger scales E(k) ∼ k-1. It was obtained that change of the kinetic energy per unit mass is proportional to the cube of the counterflow of normal and superfluid components at Gorter-Mellink mode, thus the energy dissipation originate from friction between normal component of helium and vortex tangle.

Original languageEnglish
Pages (from-to)245-252
Number of pages8
JournalFizika Nizkikh Temperatur
Volume43
Issue number2
Publication statusPublished - 1 Feb 2017

Keywords

  • Quantum turbulence
  • Superfluidity
  • Vortex structure

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