Superfluid Helium in Three-Dimensional Counterflow Differs Strongly from Classical Flows: Anisotropy on Small Scales

L. Biferale; D. Khomenko; V. L'vov; A. Pomyalov; I. Procaccia; G. Sahoo

doi:10.1103/PhysRevLett.122.144501

Superfluid Helium in Three-Dimensional Counterflow Differs Strongly from Classical Flows: Anisotropy on Small Scales

L. Biferale, D. Khomenko, V. L'vov, A. Pomyalov, I. Procaccia, G. Sahoo

Department of Chemical and Biological Physics

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Three-dimensional anisotropic turbulence in classical fluids tends towards isotropy and homogeneity with decreasing scales, allowing-eventually-the abstract model of homogeneous and isotropic turbulence to be relevant. We show here that the opposite is true for superfluid He-4 turbulence in three-dimensional counterflow channel geometry. This flow becomes less isotropic upon decreasing scales, becoming eventually quasi-two-dimensional. The physical reason for this unusual phenomenon is elucidated and supported by theory and simulations.

Original language	English
Article number	144501
Number of pages	6
Journal	Physical Review Letters
Volume	122
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.122.144501
Publication status	Published - 8 Apr 2019

Bibliographical note

L. B. acknowledges funding from the European Union’s Seventh Framework Programme (FP7/2007-2013) Grant No. 339032. G. S. thanks the AtMath Collaboration at the University of Helsinki. D. K. acknowledges funding from the Simons Foundation under Grant No. 454955 (Francesco Zamponi).

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https://arxiv.org/abs/1901.02215Licence: Other

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AU - L'vov, V.

AU - Pomyalov, A.

AU - Procaccia, I.

AU - Sahoo, G.

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AB - Three-dimensional anisotropic turbulence in classical fluids tends towards isotropy and homogeneity with decreasing scales, allowing-eventually-the abstract model of homogeneous and isotropic turbulence to be relevant. We show here that the opposite is true for superfluid He-4 turbulence in three-dimensional counterflow channel geometry. This flow becomes less isotropic upon decreasing scales, becoming eventually quasi-two-dimensional. The physical reason for this unusual phenomenon is elucidated and supported by theory and simulations.

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Superfluid Helium in Three-Dimensional Counterflow Differs Strongly from Classical Flows: Anisotropy on Small Scales

Abstract

Bibliographical note

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