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Hydromagnetic combined heat and mass transfer by natural convection from a permeable surface embedded in a fluid-saturated porous medium. (English) Zbl 1002.76105

The authors analyze the problem of coupled heat and mass transfer by natural convection from a vertical semi-infinite flat plate embedded in a porous medium in the presence of an external magnetic field and internal heat generation or absorption effects. The plate surface is maintained either at constant temperature or at constant heat flux, and is permeable to allow for possible fluid wall suction or blowing. The resulting governing equations are non-dimensionalized and transformed using a non-similarity transformation, and then are solved numerically by an implicit iterative finite difference scheme. The authors perform a parametric study of all involved parameter, and give a representative set of numerical results on velocity, temperature, concentration profiles, and skin friction. Nusselt and Sherwood numbers are illustrated graphically to show typical trends of solutions. Comparisons with previously published work are performed, and excellent agreement is obtained.

MSC:

76R10 Free convection
76W05 Magnetohydrodynamics and electrohydrodynamics
76S05 Flows in porous media; filtration; seepage
76M20 Finite difference methods applied to problems in fluid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
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