Scaling laws in turbulent Rayleigh-Benard convection under different geometry

被引：17

作者：

Song, Hao ^{[1
]}

Tong, Penger ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

EPL | 2010年 / 90卷 / 04期

关键词：

HEAT-TRANSPORT; THERMAL TURBULENCE; BOUNDARY-LAYER; PRANDTL-NUMBER; ASPECT RATIO; OSCILLATIONS; CIRCULATION;

D O I：

10.1209/0295-5075/90/44001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A systematic study of turbulent Rayleigh-Benard convection is carried out in two horizontal cylindrical cells of different lengths filled with water. Global heat transport and local temperature and velocity measurements are made over varying Rayleigh numbers Ra. The scaling behavior of the measured Nusselt number Nu(Ra) and the Reynolds number Re(Ra) associated with the large-scale circulation remains the same as that in the upright cylinders. The scaling exponent for the rms value of local temperature fluctuations, however, is strongly influenced by the aspect ratio and shape of the convection cell. The experiment clearly reveals the important roles played by the cell geometry in determining the scaling properties of convective turbulence. Copyright (C) EPLA, 2010

引用

页数：6

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