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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 被引量：1

MHD Natural Convection With Joule and Viscous Heating Effects in Iso-Flux Porous Media-Filled Enclosures
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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Forch-heimer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. 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.
作者 Y·M·巴达维 H·M·杜威瑞
机构地区 约旦大学工程技术学院机械工程系
出处 《应用数学和力学》 CSCD 北大核心 2010年第9期1057-1065,共9页 Applied Mathematics and Mechanics
关键词 磁流体动力学(MHD) 自然对流 多孔介质 MHD natural convection porous media
分类号 O361.3 [理学—流体力学]
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参考文献11

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应用数学和力学
2010年 第9期

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