THE INFLUENCE OF THERMAL RADIATION ON MHD FLOW OF A MICROPOLAR FLUID OVER A STRETCHABLE DISK WITH VISCOUS DISSIPATION

T he flow induced in a micropolar fluid by stretchable disk is investigated assuming that the fluid is a micropolar over a stretchable disk and the disk is subjected to an external transversse magnetic fluid under the influence of thermal radiation and viscous dissipation. A suitable similar transformation is used to transform the governing boundary layer partial differential equation into ordinary differential equations. The implicit finite difference scheme is used to solve the reduced non-linear ordinary differential equations along with the associated boundary conditions. Effects of the flow parameters such as micropolar parameter, magnetic field parameter, Prandtl number, thermal radiation, viscous dissipation on the axial, radial velocities, microrotation and temperature distribution are shown graphically and analyzed. Also a quantitative discussions are presented for shear and couple stresses and heat transfer rate over the disk.