Onset of oscillatory convection in a porous cylinder saturated with a viscoelastic fluid

被引：25
|
作者：
Zhang, Zhiyong [1 ]
Fu, Ceji [1 ]
Tan, Wenchang [1 ]
Wang, C. Y. [1 ]
机构：
[1] Peking Univ, Coll Engn, Dept Mech & Aerosp Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
来源：
PHYSICS OF FLUIDS | 2007年 / 19卷 / 09期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2773739
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A stability analysis determining the onset of oscillatory convection in a bounded cylindrical cavity containing a viscoelastic fluid saturated porous medium is performed for insulated sidewalls, isothermal top wall, and bottom heated by constant heat flux or constant temperature. The dependence of the critical Darcy-Rayleigh number and the preferred convective motion on both the aspect ratio of the cylinder and the viscoelastic parameters is established. The differences between bottom constant heat flux heating and bottom constant temperature heating are compared. (c) 2007 American Institute of Physics.
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页数：4
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