The onset of convection in an anisotropic porous layer inclined at a small angle from the horizontal

被引：8
|
作者：
Postelnicu, A
Rees, DAS
机构：
[1] Transylvania Univ Brasov, Dept Thermo & Fluid Mech, Brasov 2200, Romania
[2] Univ Bath, Dept Mech Engn, Bath BA2 7AY, Avon, England
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2001年 / 28卷 / 05期
关键词：
D O I：
10.1016/S0735-1933(01)00268-8
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
We consider the onset of convection in a porous layer heated from below. The layer is anisotropic with respect to both its permeability and diffusivity and is inclined at a small angle to the horizontal. The aim of this work is to determine analytically by how much the critical Rayleigh number varies when the layer first ceases to be horizontal. For nearly isotropic layers we show that rolls may be either longitudinal or transverse depending on the nondimensional parameters; this is unlike the case of O(1) inclinations the results of which are presented in a companion paper. (C) 2001 Elsevier Science Ltd.
引用
收藏
页码：641 / 650
页数：10
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