Random roughness of boundary increases the turbulent convection scaling exponent

被引：73

作者：

Ciliberto, S ^{[1
]}

Laroche, C ^{[1
]}

机构：

[1] Ecole Normale Super Lyon, Phys Lab, CNRS URA1325, F-69364 Lyon 07, France

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.82.3998

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of the boundary layer properties on the heat transport in turbulent thermal convection is experimentally investigated in a cell with a rough bottom plate. It is shown that the standard 2/7 exponent of the convective heat flow dependence on the Rayleigh number, usually observed in a cell with smooth boundaries, increases if the roughness has power law distributed asperity heights and the thermal boundary layer thickness is smaller than the maximum asperity size. In contrast a periodic roughness does not influence the heat transport law exponent.

引用

页码：3998 / 4001

页数：4

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