RESUMEN
In this paper unsteady laminar
free convection flow of a viscous incompressible fluid past and accelerated
infinite vertical porous plate subjected to a constant suction (or injection)
is considered. Numerical results for the skin friction on the plate are
obtained for the class of accelerated motions whose velocity is of the form UOtn
where t is time, UO a constant and n is a positive integer. The skin
friction tends to 0 with increasing t when the Grashorf number Gr= λ2,
the Prandtl number σ =1, n=0, and λ>0 which corresponds to
suctions.