Abstract
The effect of the periodic oscillation of the surface temperature on the transient free convection from a vertical plate is investigated in the present paper. The problem has been simplified by the laminar boundary layer and Boussinesq approximations. The fully implicit finite-difference scheme is used to solve the dimensionless system of the governing equations. The results for laminar flow of air Pr=0.72 and water Pr=7.00 are presented for an isothermal flat plate and for a periodic oscillation of the plate temperature. The results presented to show the steady periodic variation of Nusselt number with the amplitude and frequency of the oscillating surface temperature. It is found that increasing the amplitude and the frequency of the oscillating surface temperature will decrease the free convection heat transfer from the plate to both air and water.
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