Abstract
In this paper the unsteady laminar free-convection flow of a viscous incompressible fluid, past an accelerated infinite vertical porous plate subjected to a constant suction (or injection) in considered. Numerical results for the skin-friction on the plate are obtained for the class of accelerated motions whose velocity is of the formU0t n wheret is time,U0 a constant, andn is a positive integer. The skin friction tends to zero with increasingt when the Grashof number Gr=λ2, the Prandtl number σ=1,n=0, and λ>0 which corresponds to suction.
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