Abstract
In this study, we investigate the influence of viscous dissipation and radiation on the problem of unsteady MHD mixed convection two-dimensional laminar flow of an incompressible electrically conducting micropolar fluid past a semi-infinite vertical moving porous plate embedded in a porous medium. By taking the radiative heat flux in the differential form and imposing an oscillatory time-dependent perturbation, the coupled nonlinear equations are solved for the temperature and velocity distributions. The effects of the material parameters on the temperature and velocity profiles are discussed quantitatively. Especially, the effects of non-zero values of micro-gyration vector on the velocity, angular velocity and temperature fields across the boundary layer are studied. Numerical evaluation of the analytical results is performed and some graphical results for the velocity, angular velocity and temperature profiles within the boundary layer have been illustrated.