Properties of steady states in turbulent axisymmetric flows

被引：54

作者：

Monchaux, R ^{[1
]}

Ravelet, F ^{[1
]}

Dubrulle, B ^{[1
]}

Chiffaudel, A ^{[1
]}

Daviaud, F ^{[1
]}

机构：

[1] CEA Saclay, Serv Phys Etat Condense, DSM, CNRS,URA 2464, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.96.124502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally study the properties of mean and most probable velocity fields in a turbulent von Karman flow. These fields are found to be described by two families of functions, as predicted by a recent statistical mechanics study of 3D axisymmetric flows. We show that these functions depend on the viscosity and on the forcing. Furthermore, when the Reynolds number is increased, we exhibit a tendency for Beltramization of the flow, i.e., a velocity-vorticity alignment. This result provides a first experimental evidence of nonlinearity depletion in nonhomogeneous nonisotropic turbulent flow.

引用

页数：4

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