Stability of convection in a gravity modulated porous layer heated from below

被引：58

作者：

Govender, S ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Sch Mech Engn, ZA-4041 Durban, South Africa

来源：

TRANSPORT IN POROUS MEDIA | 2004年 / 57卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

gravity modulation; porous media; free convection; froude Number; Vadasz number;

D O I：

10.1023/B:TIPM.0000032739.39927.af

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The linear stability theory is used to investigate analytically the effects of gravity modulation on convection in a homogenous porous layer heated from below. The gravitational field consists of a constant part and a sinusoidally varying part, which is tantamount to a vertically oscillating porous layer subjected to constant gravity. The linear stability results are presented for the specific case of low amplitude vibration for which it is shown that increasing the frequency of vibration stabilises the convection.

引用

页码：113 / 123

页数：11

共 12 条

[1]

Alex SM, 2002, J POROUS MEDIA, V5, P137

[2] Effect of a variable gravity field on convection in an anisotropic porous medium with internal heat source and inclined temperature gradient [J].