SHEARED BOUNDARY-LAYERS IN TURBULENT RAYLEIGH-BENARD CONVECTION

被引：80

作者：

SOLOMON, TH ^{[1
]}

GOLLUB, JP ^{[1
]}

机构：

[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.64.2382

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thermal boundary layers in turbulent Rayleigh-Bénard convection are studied experimentally using a novel system in which the convecting fluid is sheared from below with a flowing layer of mercury. Oscillatory shear substantially alters the spatial structure and frequency of the eruptions, with minimal effect on the heat flux (<5%). The temperature probability distribution function (PDF) just above the lower boundary layer changes from Gaussian to exponential, without significant changes in the interior PDF. Implications for theories of hard turbulence are discussed. © 1990 The American Physical Society.

引用

页码：2382 / 2385

页数：4

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