Reorientation of the large-scale circulation in turbulent Rayleigh-Benard convection

被引：171

作者：

Brown, E ^{[1
]}

Nikolaenko, A ^{[1
]}

Ahlers, G ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Pyys & iQUEST, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.95.084503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of the orientation theta(0)(t) of the large-scale circulation (LSC) of turbulent Rayleigh-Benard convection in cylindrical cells of aspect ratio 1. theta(0)(t) undergoes irregular reorientations. It contains reorientation events by rotation through angles Delta theta with a monotonically decreasing probability distribution p(Delta theta), and by cessations (where the LSC stops temporarily) with a uniform p(Delta theta). Reorientations have Poissonian statistics in time. The amplitude of the LSC and the magnitude of the azimuthal rotation rate have a negative correlation.

引用

页数：4

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