Free convection and mass transfer effects on the oscillatory flow of a dissipative fluid past an infinite vertical porous plate (II) |
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Authors: | G. A. Georgantopoulos N. G. Kafousias N. D. Nanousis C. N. Douskos |
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Affiliation: | (1) Department of Mechanics, University of Patras, Patras, Greece |
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Abstract: | The effects of free convection and mass transfer on the mean steady flow of an incompressible, dissipative, viscous fluid past an infinite vertical, porous plate, with constant suction, was studied in the preceding paper, while in the present work an analysis for the unsteady flow is presented. The solutions for the transient velocity profiles, transient temperature profiles, the amplitude and the phase of the skin friction and the rate of heat transfer are obtained here by using the assumptions and results of the preceding paper. The effects of Grashof number (Gr), modified Grashof number (Gc), Eckert number (E), Schmidt number (Sc) and the frequency (), on the unsteady flow field, are discussed for the case of air (P = 0·71), when the plate is cooled by the free convection currents (Gr > 0). |
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