Abstract
Second-law characteristics of heat transfer and fluid flow due to mixed convection of non-Newtonian fluids over a horizontal plate with a prescribed surface temperature in a porous medium are analyzed. Velocity and temperature fields are obtained numerically using an implicit finite difference method under the similarity assumption, and these results are used to compute the entropy generation rateNs, the irreversibility ratio , and the Bejan number Be for both pseudoplastic and dilatant fluids. The effects of the power-law index n, the temperature variation , the mixed convection parameter , the axial distance x, and the viscous frictional parameterG on the velocity and temperature profiles, the dimensionless entropy generation rate Ns, the irreversibility ratio , and the Bejan number Be are investigated and presented graphically.
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