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：5
页码：787-798
出版社：International Energy and Environment Foundation (IEEF)
摘要：This paper considers the magnetohydrodynamic flow and heat transfer in a viscous incompressible fluid between two parallel porous plates experiencing a discontinuous change in wall temperature. An explicit finite difference scheme has been employed to solve the coupled non-linear equations governing the flow. The flow phenomenon has been characterized by Hartmann number M, suction Reynolds number R, channel Reynolds number R* and Prandtl number Pr. The effects of these parameters on the velocity and temperature distribution have been analyzed and the results are presented with the aid of figures. It is observed that a growing suction parameter R retards the velocity of the flow field both in MHD (M not equal 0) as well as non-MHD (M = 0) flow. The effect of increasing Hartmann number M is to decrease the transverse component of velocity for both suction (R greater than 0) and injection (R grater than 0) and in absence of suction and injection (R = 0), while it decreases the axial component of velocity up to the middle of the channel and beyond this the effect reverses. There is a sharp fluctuation in temperature near the walls and at the middle of the channel which may be attributed to the discontinuous change in wall temperature. For fluids having low Prandtl number such as air (Pr = 0.71), the temperature assumes negative values.
