Role of thermal diffusion on double-diffusive natural convection in a vertical annular porous medium

被引：4

作者：

Jha, Basant Kumar ^{[1
]}

Joseph, Sylvester Bakut ^{[2
]}

Ajibade, Abiodun Olusegun ^{[1
]}

机构：

[1] Ahmadu Bello Univ, Dept Math, Zaria, Nigeria

[2] Nuhu Bamalli Polytech, Dept Math & Stat, Zaria, Nigeria

来源：

AIN SHAMS ENGINEERING JOURNAL | 2015年 / 6卷 / 02期

关键词：

Modified Darcy number; Natural convection; Annular duct; Porous medium; Double diffusion; Soret effect;

D O I：

10.1016/j.asej.2014.11.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper derives analytical solutions of fully developed natural convection heat and mass transfer in a vertical annular non-Darcy porous medium. This investigation extends the work of Cheng (2006) to a situation where Soret effect is present and the flow is both aided and opposed. The influence of the controlling parameters on the flow characteristics has been seen to be higher for double diffusion in the absence of Soret effect than in the presence of Soret effect. It is found that the presence of Soret effect reduces the dependence of the volume flow rate, the total heat rate and the total species rate on the inner radius-gap ratio and on the modified Darcy number. (C) 2014 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B. V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

引用

页码：629 / 637

页数：9

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