• MIXED CONVECTIVE FLOW OVER A NON–ISOTHERMAL VERTICAL SURFACE IN A POROUS MEDIUM WITH APPLIED MAGNETIC FIELD AND THE ANALOGY OF A SECOND ORDER FLUID BY CREATING SINUSOIDAL DISTURBANCES

Abstract

In this paper mixed convective flow over a non–isothermal vertical surface in a porous medium with applied magnetic field (part-a) and the problem of visco elastic fluid flow disturbances on a flat porous bed when the bounding surface is subjected to sinusoidal disturbances have been examined (part-b). The salient features in both the cases have been compared wherever possible. Surprisingly, it has been noticed that some of the parameters in both the cases causes similar effect. It is observed that, the porosity factor in the case of second order fluid is almost similar to that of the magnetic field and the visco elasticity parameter is identical to that of radiation parameter. Further, there exists a close analogy between the porosity of the medium when examined on the flow by creating the sinusoidal disturbances which is identical to the parameter in case of mixed convective flow. Interestingly, it is found that for the constant visco elasticity and porosity parameter, the frequency of excitation parameter behaves exactly similar to that of mixed convection parameter. Also frequency of excitation and time were found to have the same effect as that of mixed convection parameter. However, it is noticed that, the investigations stated above are applicable in the boundary layer region.
Keywords: Mixed convection, Variable temperature, Porous media, Elastico viscous fluid, Sinusoidal disturbances.