Prandtl-, Rayleigh-, and Rossby-Number Dependence of Heat Transport in Turbulent Rotating Rayleigh-Benard Convection

被引：137

作者：

Zhong, Jin-Qiang ^{[1
,2
]}

Stevens, Richard J. A. M. ^{[3
,4
]}

Clercx, Herman J. H. ^{[5
,6
,7
]}

Verzicco, Roberto ^{[8
]}

Lohse, Detlef ^{[3
,4
]}

Ahlers, Guenter ^{[1
,2
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, iQCD, Santa Barbara, CA 93106 USA

[3] Univ Twente, Dept Sci & Technol, NL-7500 AE Enschede, Netherlands

[4] Univ Twente, JM Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

[5] Univ Twente, Dept Appl Math, NL-7500 AE Enschede, Netherlands

[6] Eindhoven Univ Technol, Dept Phys, NL-5600 MB Eindhoven, Netherlands

[7] Eindhoven Univ Technol, JM Burgers Ctr Fluid Dynam, NL-5600 MB Eindhoven, Netherlands

[8] Univ Roma Tor Vergata, Dept Mech Engn, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 04期

基金：

美国国家科学基金会;

关键词：

FLOW;

D O I：

10.1103/PhysRevLett.102.044502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Experimental and numerical data for the heat transfer as a function of the Rayleigh, Prandtl, and Rossby numbers in turbulent rotating Rayleigh-Benard convection are presented. For relatively small Ra approximate to 10(8) and large Pr modest rotation can enhance the heat transfer by up to 30%. At larger Ra there is less heat-transfer enhancement, and at small Pr less than or similar to 0.7 there is no heat-transfer enhancement at all. We suggest that the small-Pr behavior is due to the breakdown of the heat-transfer-enhancing Ekman pumping because of larger thermal diffusion.

引用

页数：4

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