The Onset of Convection in a Sloping Layered Porous Medium: Effects of Local Thermal Non-equilibrium and Heterogeneity

被引：8

作者：

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

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

Barletta, A. ^{[3
]}

Celli, M. ^{[3
]}

机构：

[1] Univ Auckland, Dept Engn Sci, Private Bag 92019, Auckland 1142, New Zealand

[2] North Carolina State Univ, Dept Mech & Aerosp Engn, Campus Box 7910, Raleigh, NC 27695 USA

[3] Alma Mater Studiorum Univ Bologna, Dept Ind Engn, Viale Risorgimento 2, I-40136 Bologna, Italy

来源：

TRANSPORT IN POROUS MEDIA | 2016年 / 114卷 / 01期

关键词：

Sloping layer; Local thermal non-equilibrium; Porous medium; Instability; Natural convection; DARCY-BENARD CONVECTION;

D O I：

10.1007/s11242-016-0728-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We have investigated the onset of convection instability in a heterogeneous inclined porous layer. Our equations also account for local thermal non-equilibrium. We modelled the effect of heterogeneity by assuming that the layer is composed of two porous sub-layers with different properties, such as permeability, fluid conductivity, solid conductivity, interphase heat transfer coefficient and porosity. We identified which of these factors have major and which have minor effect on the instability. We also characterized the accuracy of one-term Galerkin approximation for this problem. In order to do this, we compared the results obtained by Galerkin approximation with the results obtained by a highly accurate numerical solver.

引用

页码：87 / 97

页数：11

共 50 条

[1] The Onset of Convection in a Sloping Layered Porous Medium: Effects of Local Thermal Non-equilibrium and Heterogeneity
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A. V. Kuznetsov
A. Barletta
M. Celli
[J]. Transport in Porous Media, 2016, 114 : 87 - 97
[2] Local Thermal Non-Equilibrium and Heterogeneity Effects on the Onset of Convection in a Layered Porous Medium
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[J]. Transport in Porous Media, 2014, 102 : 1 - 13
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