Review of Advances in Physics Theories and Applications, 2014, 1(3): 48-62 *Corresponding Author 48 UNSTEADY MHD FREE CONVECTION BOUNDARY LAYER FLOW OF RADIATION ABSORBING KUVSHINSKI FLUID THROUGH POROUS MEDIUM B. Vidya Sagar 1 --- M.C.Raju 2 * --- S.V.K.Varma 3 --- S.Venkataramana 4 1, 3, 4 Department of Mathematics, Sri Venkateswara University, Tirupati, A.P, India 2 Department of Humanities and Sciences, Annamacharya Institute of Technology and Sciences, Rajampet (Autonomous), A.P, India ABSTRACT An analytical study is carried out for an unsteady MHD two dimensional free convection flow of a viscous, incompressible, radiating, chemically reacting and radiation absorbing Kuvshinski fluid through a porous medium past a semi-infinite vertical plate. The dimensionless equations governing the flow are solved by simple perturbation technique. The expressions for velocity, temperature and concentration are derived. The influence of various material parameters on flow quantities are studied and discussed with the help of graphs. The expressions for Skin friction, Nusselt number and Sherwood number are also derived and discussed numerically. Temperature increases with an increase in radiation parameter and radiation absorption parameter where as it decreases with an increase in Prandtl number. Concentration is observed to be decreased when chemical reaction parameter and Schmidt number increase. © 2014 Pak Publishing Group. All Rights Reserved. Keywords: MHD, Heat and mass transfer, Radiation, Chemical reaction, Radiation absorption, Porous medium, Viscous dissipation, Kuvshinski fluid. Contribution/ Originality This study contributes in the existing literature of Newtonian fluids. Most of the practical problems involve non-Newtonian fluids type. This study uses new estimation methodology of analyzing the heat transfer characteristics of non-Newtonian fluid. This study originates new formula of solving nonlinear governing equations using perturbation method. This study is one of very few studies which have investigated on the heat and mass transfer characteristics of a well- known non-Newtonian fluid Kuvshinski fluid in the presence of uniform magnetic field. The paper's primary contribution is finding that effects of various physical parameters on the flow Review of Advances in Physics Theories and Applications journal homepage: http://pakinsight.com/?ic=journal&journal=75