The effects of viscosity, magnetic field, and mass leakage on the unsteady flow of an incompressible and electrically conducting fluid in the presence of transverse magnetic field have been analyzed when the flow is generated due to ramped motion of the horizontal porous plate. A unified closed form analytical solution have been obtained for fluid velocity and skin-friction corresponding to the cases of magnetic field fixed relative to the fluid or moving porous plate. The variations of velocity and skin-friction have been discussed for different values of magnetic and suction/injection parameters. The flow formation due to ramped motion of porous plate has also been compared with the flow formation due to constant motion of porous plate.
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Jha et al. (2012) studied this question.
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