Strong anisotropy of superfluid 4He counterflow turbulence

被引：8

作者：

Biferale, L. ^{[1
,2
]}

Khomenko, D. ^{[3
]}

L'vov, V. S. ^{[4
]}

Pomyalov, A. ^{[4
]}

Procaccia, I ^{[4
,5
]}

Sahoo, G. ^{[6
,7
]}

机构：

[1] Univ Roma Tor Vergata, Dept Phys, Rome, Italy

[2] Univ Roma Tor Vergata, Ist Nazl Fis Nucl, Rome, Italy

[3] Sorbonne Univ, PSL Res Univ, CNRS, Lab Phys,Dept Phys,ENS, F-75005 Paris, France

[4] Weizmann Inst Sci, Dept Chem & Biol Phys, Rehovot, Israel

[5] Northwestern Polytech Univ, Ctr OPT IMagery Anal & Learning, Xian 710072, Shaanxi, Peoples R China

[6] Univ Helsinki, Dept Math & Stat, Helsinki, Finland

[7] Univ Helsinki, Dept Phys, Helsinki, Finland

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 13期

关键词：

LIQUID HELIUM-II; MUTUAL FRICTION; HEAT CURRENT; STATISTICS; SPECTRA;

D O I：

10.1103/PhysRevB.100.134515

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on a combined theoretical and numerical study of counterflow turbulence in superfluid He-4 in a wide range of parameters. The energy spectra of the velocity fluctuations of both the normal-fluid and superfluid components are strongly anisotropic. The angular dependence of the correlation between velocity fluctuations of the two components plays the key role. A selective energy dissipation intensifies as scales decrease, with the streamwise velocity fluctuations becoming dominant. Most of the flow energy is concentrated in a wave-vector plane which is orthogonal to the direction of the counterflow. The phenomenon becomes more prominent at higher temperatures as the coupling between the components depends on the temperature and the direction with respect to the counterflow velocity.

引用

页数：15

共 52 条

[1] Cascades and transitions in turbulent flows [J].

Alexakis, A. ;

Biferale, L. .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2018, 767 :1-101

[2] Correlation functions in isotropic and anisotropic turbulence: The role of the symmetry group [J].

Arad, I ;

L'vov, VS ;

Procaccia, I .

PHYSICAL REVIEW E, 1999, 59 (06) :6753-6765

[3] Anomalous scaling in anisotropic turbulence [J].

Arad, I ;

L'vov, VS ;

Procaccia, I .

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 2000, 288 (1-4) :280-307

[4] Coexistence and interplay of quantum and classical turbulence in superfluid 4He: Decay, velocity decoupling, and counterflow energy spectra [J].

Babuin, S. ;

L'vov, V. S. ;

Pomyalov, A. ;

Skrbek, L. ;

Varga, E. .

PHYSICAL REVIEW B, 2016, 94 (17)

[5] Statistics of turbulence and intermittency enhancement in superfluid 4He counterflow [J].

Bao, S. ;

Guo, W. ;

L'vov, V. S. ;

Pomyalov, A. .

PHYSICAL REVIEW B, 2018, 98 (17)

[6] Experimental, numerical, and analytical velocity spectra in turbulent quantum fluid [J].

Barenghi, Carlo F. ;

L'vov, Victor S. ;

Roche, Philippe-E. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2014, 111 :4683-4690

[7]

Barenghi CF, 2001, LECT NOTES PHYS, V571

[8]

BEKAREVICH IL, 1961, SOV PHYS JETP-USSR, V13, P643

[9] Anisotropy in turbulent flows and in turbulent transport [J].

Biferale, L ;

Procaccia, I .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 414 (2-3) :43-164

[10] Superfluid Helium in Three-Dimensional Counterflow Differs Strongly from Classical Flows: Anisotropy on Small Scales [J].

Biferale, L. ;

Khomenko, D. ;

L'vov, V ;

Pomyalov, A. ;

Procaccia, I ;

Sahoo, G. .

PHYSICAL REVIEW LETTERS, 2019, 122 (14)

← 1 2 3 4 5 6 →