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首页> 外文期刊>Journal of Energy, Heat and Mass Transfer >Finite Element Analysis of Heat and Mass Transfer of an Unsteady MHD Natural Convection Flow of a Rotating Fluid Past a Vertical Porous Plate in the Presence of Radiative Heat Transfer
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Finite Element Analysis of Heat and Mass Transfer of an Unsteady MHD Natural Convection Flow of a Rotating Fluid Past a Vertical Porous Plate in the Presence of Radiative Heat Transfer

机译：存在辐射传热的旋转流体通过垂直多孔板的非定常MHD自然对流的传热和传质的有限元分析

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摘要

The numerical solution of unsteady hydro-magnetic natural convection heat and mass transfer flow of a rotating, incompressible, viscous Boussinesq fluid is presented in this study in the presence of radiative heat transfer and a first order chemical reaction between the fluid and diffusing species. The Rosseland approximation for an optically thick fluid is invoked to describe the radiative flux. The solutions for velocity, temperature and concentration fields have been obtained by using Ritz finite element method. The results obtained are discussed for Grashof number (G_r > 0) corresponding to cooling of the plate and (G_r < 0) corresponding to heating of the plate for various parameters such as P_r, Sc, M, N, K, G_r, G_c and t with the help of graphs and tables. The numerical values of skin-friction coefficient entered in the tables. Results obtained show that a decrease in the temperature boundary layer occurs when the Prandtl number and the radiation parameter are increased and the flow velocity approaches steady state as the time parameter t, is increased. These findings are in quantitative agreement with earlier reported studies.
机译：在存在辐射传热以及流体与扩散物质之间存在一阶化学反应的情况下，本研究提出了非稳态水磁自然对流传热和旋转，不可压缩的粘性Boussinesq流体传质流的数值解。调用光学上较稠密流体的Rosseland近似值来描述辐射通量。速度，温度和浓度场的解已通过使用Ritz有限元方法获得。对于各种参数（例如P_r，Sc，M，N，K，G_r，G_c和G_c），讨论了对应于平板冷却的Grashof数（G_r> 0）和对应于平板加热的（G_r <0）的结果。借助图形和表格。在表中输入的皮肤摩擦系数的数值。获得的结果表明，当增加Prandtl数和辐射参数并且随着时间参数t的增加，流速趋于稳态时，会出现温度边界层的减小。这些发现与早期报道的研究在数量上是一致的。

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