On the onset of thermal convection in rotating nanofluid layer saturating a Darcy-Brinkman porous medium

被引：118

作者：

Chand, Ramesh ^{[2
]}

Rana, G. C. ^{[1
]}

机构：

[1] NSCBM Govt PG Coll, Dept Math, Hamirpur 177005, Himachal Prades, India

[2] Govt PG Coll, Dept Math, Dhaliara 177103, Himachal Prades, India

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2012年 / 55卷 / 21-22期

关键词：

Nanofluid; Oscillatory convection; Rayleigh Number; Rotation; Thermal convection; Vadasz number; INSTABILITY; ENHANCEMENT;

D O I：

10.1016/j.ijheatmasstransfer.2012.04.043

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this paper, the effect of rotation on the onset of thermal convection in a horizontal layer of nanofluid saturated by a Darcy-Brinkman porous medium is considered. A linear stability analysis based upon normal mode is used to find solution of the fluid layer confined between two free boundaries. The onset criterion for stationary and oscillatory convection is derived analytically and graphically. The effects of the concentration Rayleigh number, Taylor number, Lewis number, Darcy number and modified diffusivity ratio on the stability of the system are investigated. The sufficient conditions for the non-existence of overstability are also derived. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：5417 / 5424

页数：8

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