Radiation effect on mixed convection over an isothermal wedge in porous media: The entire regime

In this article, numerical solutio,ls are presented for the effect of radia tion on mixed-convection flow of optically dense viscous fluids about an is othermal wedge embedded in a saturated porous medium. The partial different ial equations are transformed into the nonsimilar boundary-layer equations, which are solved by the Keller box method. Numerical results for the dimen sionless temperature profiles and the local Nusselt number parameter are pr esented for the combined convection parameter chi, the wedge angle paramete r lambda, the radiation-conduction parameter R-d, and the surface temperatu re parameter H. The entire regime of the mixed convection is included, when chi varies from 0 (pure free convection) to 1 (pure forced convection). As chi varies from 0 to 1, the variation of the local Nusselt number paramete r has the phenomenon of minimum. As the wedge angle parameter lambda increa ses. the local Nusselt number parameter increases. When the radiation effec t becomes significant (for the case of large values of R-d and H), the loca l Nusselt number parameter is also greatly increased