An exact analysis of the physical effects of thermo-diffusion (Soret) and thermal radiation on free convective unsteady two-dimensional heat and mass transfer flow of a thermally generating Newtonian viscous incompressible fluid on an oscillating vertical permeable surface is presented. The governing system of partial differential equations is transformed into a set of ordinary differential equations by using a set of periodic transformations. Cogly-Vincentine-Gilles equilibrium heat flux model is incorporated in the energy equation. Exact closed form of solutions for velocity, temperature and concentration fields as well as skin-friction, Nusselt and Sherwood numbers are obtained in terms of various pertinent parameters present and are finally interpreted numerically through graphs and tables.

free convection, mass transfer, heat generation, thermal radiation, thermo diffusion.