Turbulent velocity spectra in superfluid flows

Autor:	Salort, J., Baudet, C., Castaing, B., Chabaud, B., Daviaud, F., Didelot, T., Diribarne, P., Dubrulle, B., Gagne, Y., Gauthier, F., Girard, A., Hébral, B., Rousset, B., Thibault, P., Roche, P. -E.
Rok vydání:	2012
Předmět:	Physics - Fluid Dynamics Condensed Matter - Quantum Gases Condensed Matter - Statistical Mechanics
Zdroj:	Physics of Fluids : Phys. Fluids 22 (2010) 125102
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3504375
Popis:	We present velocity spectra measured in three cryogenic liquid 4He steady flows: grid and wake flows in a pressurized wind tunnel capable of achieving mean velocities up to 5 m/s at temperatures above and below the superfluid transition, down to 1.7 K, and a "chunk" turbulence flow at 1.55 K, capable of sustaining mean superfluid velocities up to 1.3 m/s. Depending on the flows, the stagnation pressure probes used for anemometry are resolving from one to two decades of the inertial regime of the turbulent cascade. We do not find any evidence that the second order statistics of turbulence below the superfluid transition differ from the ones of classical turbulence, above the transition. Comment: 13 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1202.0643 Zobrazit plný text záznamu View this record from Arxiv