Effects of Radiation and free Convection Currents on Unsteady Couette Flow between two Vertical Parallel Plates with Constant Heat flux and Heat Source Through Porous Medium Kesavaiah Damala Ch1, Satyanarayana P V2, Sudhakaraiah A3 1Department of H & BS, Visvesvaraya College of Engineering & Technology, Greater Hyderabad, A.P, India. chennakesavaiah@gmail.com 2Fluid Dynamics Division, School of Advanced Science, VIT University, Vellore-632 014, T N, India 3Department of Future Studies, S V University, Tirupati-517 502, A.P, India Online published on 8 November, 2017. Abstract The present study the free convection in unsteady Couette flow of a viscous incompressible fluid confined between two vertical parallel plates in the presence of thermal radiation with heat source in the presence of uniform magnetic field is presented. The flow is induced by means of Couette motion and free convection currents occurring as a result of application of constant heat flux on the wall with a uniform vertical motion in its own plane while constant temperature on the stationary wall. The fluid considered here is a gray, absorbing-emitting but non-scattering medium, and the Rosseland approximation is used to describe the radiative heat flux in the analysis. The dimensionless governing partial differential equations are solved by using regular perturbation technique. The results for the velocity, temperature and the skin-friction are shown graphically. The effects of different parameters are discussed. Top Keywords Couette flow, Natural convection, Vertical plate, Constant heat flux, Radiation and heat source. Top |