DNS of Convective Heat Transfer in a Rotating Cylinder

被引：1

作者：

Kunnen, R. P. J. ^{[1
,2
]}

Geurts, B. J. ^{[3
]}

Clercx, H. J. H. ^{[3
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Aerodynam, Wullnerstr 5A, D-52062 Aachen, Germany

[2] Univ Aachen, RWTH, Inst Aerodynama, D-52062 Aachen, Germany

[3] Univ Twente, Ctr Fluid Dynam, Dept Appl Math, POB 217, NL-7500 AE Enschede, Netherlands

来源：

DIRECT AND LARGE-EDDY SIMULATION VII | 2010年 / 13卷

关键词：

RAYLEIGH-BENARD CONVECTION; TURBULENT THERMAL-CONVECTION; SLENDER CYLINDRICAL CELL; SCALE;

D O I：

10.1007/978-90-481-3652-0_56

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The effects of rotation on the convective heat transfer and flow structuring in a cylindrical volume of fluid is investigated with direct numerical simulation (DNS). A formulation of the discrete equations of motion in cylindrical coordinates is solved with finite-difference approximations. At constant Rayleigh (Ra; dimensionless temperature gradient) and Prandtl (sigma; characterises diffusive properties of the fluid) numbers, the Rossby number Ro, the ratio of buoyancy and Coriolis forces, is varied between runs with 0.045 less than or similar to Ro less than or similar to infinity. For Ro greater than or similar to 1.2 we find the so-called large-scale circulation. At Ro less than or similar to 1.2 slender columnar vortical plumes are found. In a range of Ro heat transfer is increased by Ekman pumping in the vortical plumes.

引用

页码：393 / +

页数：2

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