多孔介质内自然对流传热传质研究

Natural Convection with Heat and Mass Transfer in a Porus Medium

该文研究了含内热源圆柱形多孔介质内不均匀温度分布产生的浮力效应引起的自然对流。给出了以流函数表示的无量纲基本方程，用控制容积法对方程离散并进行了数值计算，得到了多孔介质内的流场、温度场和浓度场，讨论了瑞利数Ｒａ和刘易斯数Ｌｅ对多孔介质传热传质的影响。

This paper describes a study of the natural convection with heat and mass transfer induced by internal heat generation in a vertical cylinder porous medium, the natural convection is driven by buoyancy effect due to temperature variation. The dimensionless equations are obtained by introducing stream function, using the control volume formulation. And the natural convection in a porous medium has been studied by numerical calculation including the flow field, temperature and concentration profiles. The effects of Rayleigh number Ra and Lewis number Le on heat and mass transfer of a porous medium have also been numerically studied.