The Effect of Heterogeneity on the Onset of Double-Diffusive Convection Induced by Internal Heating in a Porous Medium: A Layered Model

被引：18

作者：

Nield, D. A. ^{[1
]}

Kuznetsov, A. V. ^{[2
]}

机构：

[1] Univ Auckland, Dept Engn Sci, Auckland, New Zealand

[2] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

来源：

TRANSPORT IN POROUS MEDIA | 2013年 / 100卷 / 01期

关键词：

Heterogeneity; Instability; Horizontal layers; Internal heating; Double diffusion; THERMOHALINE CONVECTION; INSTABILITY;

D O I：

10.1007/s11242-013-0206-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper we have investigated the effects of both weak and strong heterogeneity on the onset of double-diffusive convection which is induced by combined effects of internal heating and solutal gradient. To make analytical progress, we considered a composite porous medium consisting of two horizontal layers. We investigated the effects of heterogeneities in permeability, thermal conductivity, volumetric heat source strength, and porosity. The solutal diffusivity, which becomes effective when a vertical salinity gradient is imposed, is affected by variation of porosity. We found that the effect of solutal diffusivity is stabilizing when the porosity increases upwards.

引用

页码：83 / 99

页数：17

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