期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2012
卷号：3
期号：1
页码：109-118
出版社：International Energy and Environment Foundation (IEEF)
摘要：This paper theoretically investigates the unsteady free convective flow of a viscous incompressible electrically conducting fluid past an infinite vertical porous flat plate in a porous medium with constant suction in presence of a uniform transverse magnetic field. The governing equations of the flow field are solved using multi parameter perturbation technique and approximate solutions for velocity, temperature, skin friction and rate of heat transfer are obtained. The effects of the various flow parameters characterizing the flow field are analyzed with the help of figures and table. It is observed that a growing magnetic parameter M or permeability parameter Kp decelerates the transient velocity of the flow field at all points, while a growing Grashof number for heat transfer Gr accelerates the transient velocity at all points. Further, the effect of growing Prandtl number Pr is to diminish the transient temperature of the flow field at all points and on the other hand, the permeability parameter reverses the effect. The permeability parameter Kp enhances the skin friction as well as the rate of heat transfer at the wall and the magnetic parameter shows the reverse effect.
