UNSTEADY FREE-CONVECTION IN BINARY MIXTURE OF A BOUNDARY LAYER FLOW PAST A VERTICAL POROUS PLATE WITH RADIATIVE HEAT TRANSFER
DOI:
https://doi.org/10.53808/KUS.2001.3.1.0103-seKeywords:
Boundary layer; Heat transfer; Chemical reaction; Binary mixture; Arrhenius activation energyAbstract
The combined free convection dynamic boundary layer and thermal radiation boundary layer along a semi-infinite vertical porous plate with mass transfer has been analyzed. The chemical reaction for a very simple model of a binary reaction with Arrhenius activation energy is incorporated into the analysis. The fluid is considered to be gray, absorbing-emitting. Under such conditions, the coupled and unsteady non-linear momentum, energy and concentration equations of the combined layers are then made similar by introducing a time dependent length scale and by the usual method of similarity transformation. The similarity equations are then solved numerically by the method of superposition. The resulting velocity and t emperature distributions are shown graphically for different values of the parameters entering into the problem. The numerical values of the skin friction coefficient ( w ) and the Nusselt number (Nu ) are calculated and presented in a tabular form.
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