Experimental signature of quantum turbulence in velocity spectra?

被引：6

作者：

Salort, J. ^{[1
]}

Chilla, F. ^{[1
]}

Rusaouen, E. ^{[2
]}

Roche, P-E ^{[2
]}

Gibert, M. ^{[2
]}

Moukharski, I ^{[3
]}

Braslau, A. ^{[3
]}

Daviaud, F. ^{[3
]}

Gallet, B. ^{[3
]}

Saw, E-W ^{[3
]}

Dubrulle, B. ^{[3
]}

Diribarne, P. ^{[4
]}

Rousset, B. ^{[4
]}

Mardion, M. Bon ^{[4
]}

Moro, J-P ^{[4
]}

Girard, A. ^{[4
]}

Baudet, C. ^{[5
]}

L'vov, V ^{[6
]}

Golov, A. ^{[7
]}

Nazarenko, S. ^{[8
]}

机构：

[1] Univ Claude Bernard, Univ Lyon, ENS Lyon, CNRS,Lab Phys, Lyon, France

[2] Univ Grenoble Alpes, Inst NEEL, F-38042 Grenoble, France

[3] CNRS, CEA, IRAMIS, Lab SPHYNX,SPEC,URA 2464, F-91191 Gif Sur Yvette, France

[4] Univ Grenoble Alpes, IRIG, DSBT, F-38000 Grenoble, France

[5] CNRS, LEGI, F-38041 Grenoble, France

[6] Weizmann Inst Sci, Dept Chem & Biol Phys, IL-7610001 Rehovot, Israel

[7] Univ Manchester, Dept Phys & Astron, Manchester MP13 9PL, Lancs, England

[8] Univ Nice Sophia Antipolis, Inst Phys Nice, Parc Valrose, F-06108 Nice, France

来源：

NEW JOURNAL OF PHYSICS | 2021年 / 23卷 / 06期

关键词：

quantum fluids; turbulence; superfluidity; SUPERFLUID-HELIUM; DRAG; STATE; FLOW; VISUALIZATION; COUNTERFLOW; ENERGY; SPHERE; HEAT;

D O I：

10.1088/1367-2630/abfe1f

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Velocity measurements in turbulent superfluid helium between co-rotating propellers are reported. The parameters are chosen such that the flow is fully turbulent, and its dissipative scales are partly resolved by the velocity sensors. This allows for the first experimental comparison of spectra in quantum versus classical turbulence where dissipative scales are resolved. In some specific conditions, differences are observed, with an excess of energy at small scales in the quantum case compared to the classical one. This difference is consistent with the prediction of a pileup of superfluid kinetic energy at the bottom of the inertial cascade of turbulence due to a specific dissipation mechanism.

引用

页数：16

共 63 条

[1] Turbulent cascade, bottleneck, and thermalized spectrum in hyperviscous flows [J].