流经有热辐射的无限垂直多孔平板时非稳定MHD流动的Soret和Dufour效应  

Soret and Dufour Effects on Unsteady MHD Flow Past an Infinite Vertical Porous Plate With Thermal Radiation

作　　者：S·R·维姆帕蒂 A·B·拉克米-纳拉雅纳-加里 黄锋(译) 张禄坤(校) 

机构地区：[1]奥斯马尼亚大学科学学院力学系,海得拉巴-07,(A.P.),印度 [2]不详

出　　处：《应用数学和力学》2010年第12期1401-1414,共14页Applied Mathematics and Mechanics

摘　　要：不可压缩粘性导电流体,流经无限垂直多孔平板,平板存在振荡吸入速度和热辐射时,研究流动参数对自由对流和传质的非稳定磁流体动力学流动的Dufour(扩散热)和Soret(热扩散)效应.应用有限单元法,数值求解该问题的速度、温度和浓度场,还得到了表面摩擦、传热传质率的表达式.数值结果以图表方式给出,对外表致冷的平板(Gr>0)和外表加热的平板(Gr<0),给出了该方程中所遇参数的影响.The objectives of the present study are to investigate the effect of flow parameters on free convection and mass transfer unsteady magnetohydrodynamic flow of an electrically conducting,viscous,incompressible fluid past an infinite vertical porous plate under oscillatory suction velocity and thermal radiation by taking into account the Dufour （diffusion thermo） and Soret （thermal diffusion） effects.The problem is solved numerically by using finite element method for velocity,temperature and concentration field and also the expression for skin friction,rate of heat and mass transfer have been obtained.The results obtained have been presented numerically through graphs and tables for externally cooled plate （Gr〉0） and externally heated plate （Gr〈0） to observe the effects of various parameters encountered in the equations.

关 键 词：传质 MHD流动 垂直平板 吸入速度 Soret数和Dufour数 热辐射 有限单元法 

分 类 号：O361[理学—流体力学]