Long-wavelength modulation of turbulent shear flows

被引：101

作者：

Prigent, A ^{[1
]}

Grégoire, G ^{[1
]}

Chaté, H ^{[1
]}

Dauchot, O ^{[1
]}

机构：

[1] CENS, CEA, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

来源：

PHYSICA D-NONLINEAR PHENOMENA | 2003年 / 174卷 / 1-4期

关键词：

wavelength modulation; turbulent shear flows; Taylor-Couette experiments; turbulent flow bifurcation;

D O I：

10.1016/S0167-2789(02)00685-1

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

The reverse transition from turbulent to laminar flow is studied in very large aspect ratio plane Couette and Taylor-Couette experiments. We show that laminar-turbulence coexistence dynamics (turbulent spots, spiral turbulence, etc.) can be seen as the ultimate stage of a modulation of the turbulent flows present at higher Reynolds number leading to regular, long-wavelength, inclined stripes. This new type of instability, whose originality is to arise within a macroscopically fluctuating state, can be described in the framework of Ginzburg-Landau equations to which noise is heuristically added to take into account the intrinsic fluctuations of the basic state. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：100 / 113

页数：14

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