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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.
The effect of viscous and Joule heat transfer on the MHD natural convection heat conduction is numerically investigated when an isotropic porous medium is filled with slanted rectangular inclusions. One side of the rectangular inclusions is a heating surface with an equal heat flux, On the opposite side, the heatsink is equal to the heat flux, and the other two sides are adiabatic surfaces. Using a suitable set of variables, the energy equation and the Forch-heimer expansion of Darcy-Oberbeck-Boussinesq are transformed into dimensionless forms. The control parameters are the number of magnetic effects, the modified Rayleigh number, the dip angle of rectangular inclusions and their aspect ratio.The results show that the viscosity and Joule heat transfer lead to the decrease of thermal conductivity.