等通量多孔介质内填夹杂时，粘性和Joule传热对磁流体动力学自然对流的影响

Y·M·巴达维; H·M·杜威瑞

doi:10.3879/j.issn.1000-0887.2010.09.006

等通量多孔介质内填夹杂时，粘性和Joule传热对磁流体动力学自然对流的影响

doi: 10.3879/j.issn.1000-0887.2010.09.006

约旦大学工程技术学院机械工程系,安曼11942,约旦

详细信息

中图分类号: O361.3
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出版历程
- 收稿日期: 1900-01-01
- 修回日期: 2010-07-07
- 刊出日期: 2010-09-15

MHD Natural Convection With Joule and Viscous Heating Effects in Iso-Flux Porous Media-Filled Enclosures

Mechanical Engineering Department, Faculty of Engineering and Technology, University of Jordan, 11942 Amman, Jordan

摘要

摘要: 当一个等通量多孔介质内填倾斜矩形夹杂物时，数值地研究了粘性和Joule传热对磁流体动力学自然对流热传导的影响．矩形夹杂物的一边为等热通量的加热面，其对边为等热通量的致冷面，另外两边为绝热面．使用一组适当的变量，将能量方程和Darcy-Oberbeck-Boussinesq的Forchheimer推广式变换为无量纲形式，然后用有限差分法求解．控制参数为磁效应数、修正的Rayleigh数、矩形夹杂物的倾角及其长宽比．结果显示，粘性和Joule传热导致热传导率下降．
- 磁流体动力学(MHD) /
- 自然对流 /
- 多孔介质
Abstract: In this study the magnetohydrodynamics(MHD)natural convection heat transfer with Joule and viscous heating effects inside iso-flux porous media filled inclined rectangular enclosures was studied numerically.An iso-heat flux was applied for heating and cooling the two opposing walls of the enclosure while the other walls were adiabatic.The Forchheimer extension of Darcy-Oberbeck-Boussinesq and energy equations were transformed into dimensionless form using a set of suitable variables than solved using a finite difference scheme.The governing parameters are:the magnetic influence number,the modified Rayleigh number,the inclination angle,and the aspect ratio of the enclosure.The results show that the viscous and Joule heating effects decrease heat transfer rates.
- MHD /
- natural convection /
- porous media

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参考文献(11)

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