Slow dynamics in a turbulent von karman swirling flow

被引：85

作者：

de la Torre, A. ^{[1
]}

Burguete, J. ^{[1
]}

机构：

[1] Univ Navarra, Dept Fis & Matemat Aplicada, E-31080 Pamplona, Spain

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.99.054101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An experimental study of a turbulent von Karman flow in a cylinder is presented. The mean flow is stationary up to a Reynolds number Re = 10(4) where a bifurcation takes place. The new regime breaks some symmetries of the problem and becomes time dependent because of equatorial vortices moving with a precession movement. In the exact counterrotating case, a bistable regime appears and spontaneous reversals of the azimuthal velocity are registered. A three-well potential model with additive noise reproduces this dynamic. A regime of periodic response is observed when a very weak forcing is applied.

引用

页数：4

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