The objective of the present work is to develop a valid model to study heat and mass transfer of MHD free convection around a semi-infinite horizontal or inclined plate associated by chemical reaction, radiation heat flux and internal heat generation or absorption using non local similarity transformations. The credibility of this study impose to consider no-uniform conditions at the wall temperature and concentration (Tw(x) =T∞+axn, Cw(x) =C∞+bxm). Some plain and relatively simplified differential equations have been gotten, in view of a suitable numerical resolution. The expressions of the local Nusselt number, the skin-friction coefficient, and the local Sherwood number are obtained. The effects of different parameters such as Buoyancy ratio-indicating the relative importance of species and thermal diffusion N, Prandtl, Eckert and Schmidt numbers on velocity, temperature and concentration are carried out in this paper. These results can be useful in the complex design of flat plate solar captor used in renewable energy
MHD, nombres de Schmidt et d’Eckert, reaction chimique, rayonnement, transferts de chaleur et de masse, conditions aux limites
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