The Effect of Pulsating Throughflow on the Onset of Convection in a Horizontal Porous Layer

被引：9

作者：

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

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

机构：

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

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

来源：

TRANSPORT IN POROUS MEDIA | 2016年 / 111卷 / 03期

关键词：

Pulsating throughflow; Porous medium; Thermal instability; Horizontal layer; INSTABILITY;

D O I：

10.1007/s11242-015-0622-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, we present an analytical study on the onset of convection in a horizontal layer of a saturated porous medium, uniformly heated from below but with a non-uniform basic temperature gradient resulting from a pulsating vertical throughflow. We applied two methods to analyze this problem: the frozen profile and the averaged equations. We found that the two approaches lead to essentially the same results and discussed physical implications of this finding, in particular, with respect to fundamental differences between the throughflow modulation and the temperature modulation problems.

引用

页码：731 / 740

页数：10

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