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首页> 外文期刊>Communications in Nonlinear Science and Numerical Simulation >Mixed convection magnetohydrodynamic heat and mass transfer past a stretching surface in a micropolar fluid-saturated porous medium under the influence of Ohmic heating, Soret and Dufour effects
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Mixed convection magnetohydrodynamic heat and mass transfer past a stretching surface in a micropolar fluid-saturated porous medium under the influence of Ohmic heating, Soret and Dufour effects

机译：在欧姆加热，索雷特和杜福尔效应的影响下，对流磁流体动力混合热和质量传递通过微极性流体饱和多孔介质中的拉伸表面

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摘要

A numerical model is developed to examine the combined effects of Soret and Dufour on mixed convection magnetohydrodynamic heat and mass transfer in micropolar fluid-saturated Darcian porous medium in the presence of thermal radiation, non-uniform heat source/sink and Ohmic dissipation. The governing boundary layer equations for momentum, angular momentum (microrotation), energy and species transfer are transformed to a set of non-linear ordinary differential equations by using similarity solutions which are then solved numerically based on shooting algorithm with Runge-Kutta-Fehlberg integration scheme over the entire range of physical parameters with appropriate boundary conditions. The influence of Darcy number, Prandtl number, Schmidt number, Soret number and Dufour number, magnetic parameter, local thermal Crashof number and local solutal Grashof number on velocity, temperature and concentration fields are studied graphically. Finally, the effects of related physical parameters on local Skin-friction, local Nusselt number and local Sherwood number are also studied. Results showed that the fields were influenced appreciably by the Soret and Dufour effects, thermal radiation and magnetic field, etc.
机译：建立了一个数值模型，以研究在热辐射，非均匀热源/汇和欧姆耗散存在的情况下，Soret和Dufour对微对流体饱和的Darcian多孔介质中混合对流磁流体动力学传热和传质的综合影响。利用相似性解将动量，角动量（微旋转），能量和物质转移的控制边界层方程转化为一组非线性常微分方程，然后基于龙格-库塔-费尔伯格积分的射击算法对它们进行数值求解在适当的边界条件下对整个物理参数范围进行规划。用图形研究了达西数，普朗特数，施密特数，索雷特数和杜福尔数，磁参数，局部热Crashof数和局部固溶Grashof数对速度，温度和浓度场的影响。最后，研究了相关物理参数对局部皮​​肤摩擦，局部努塞尔特数和局部舍伍德数的影响。结果表明，磁场受到索雷特和杜福尔效应，热辐射和磁场等的明显影响。

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