International Journal of New Technology and Research (IJNTR) ISSN:2454-4116, Volume-3, Issue-4, March 2017 Pages 15-21 15 www.ijntr.org Abstract—An unsteady two dimensional magnetohydrodynamic flow of a visco-elastic incompressible fluid (Walters B 0 fluid model) along an infinite hot vertical porous surface bounded by porous medium with free stream as well as suction velocity in the presence of Thermal radiation, heat surface and chemical reaction has been investigated. The governing equations of motion, energy and concentration are solved by the successive perturbation technique. The variations in the fluid velocity, temperature and concentration are shown graphically where as numerical values of skin-friction; Nusselt number and Sherwood number are presented in tabular form. Index Terms— chemical reaction. Heat source, MHD flow, Porous medium, Walter’s ‘B’model. I. INTRODUCTION The study of magneto hydrodynamics heat and mass transfer processes over a moving surface is of interest in engineering and geophysical applications such as geothermal reservoirs, thermal insulation, enhanced oil recovery, packed-bed catalytic reaction and cooling of nuclear reactors. Heat and mass transfer analysis with chemical reaction has a great interest to engineers and scientist because of its universal applications in many branches of sciences and engineering. In many chemical processes, a chemical processes, a chemical reaction occurs between a foreign mass and a fluid in which a plate is moving .These processes have numerous applications such as polymer production, manufacturing of ceramics or glassware and food processing. Besides, the magneto hydrodynamic laminar boundary layer behaviour over a stretching surface is a significant type of flow having considerable practical applications in chemical engineering, electrochemistry and polymer processingProcedure for Paper Submission Flows through porous media are frequently used in filtering of gasses, liquid and drying of bulk materials. In electrochemical engineering, porous electrodes and permeable, semi permeable diaphragms are used to obtain improved current efficiencies. When fluid passes through a properly focus magnetic field, the magnetic process keeps minerals in the water rather than precipitated out. This is known as magnetic field conditioning .Further, magnetically treated fuel has a tendency to attract oxygen molecules when G.Pavan kumar, Mathematics, J.N.T.U.A, University, Anantapur, India, G.S.S.Raju,Mathematics,J.N.T.U.C.E,,Pulivendula,India, Professor in mathematics mixed with air in a combustion cylinder. This results a more efficient and complete combustion of the fuel generating more power from same amount of fuel. Several researchers have studied the two dimensional free convection, heat and mass transfer flow of an elastic-viscous fluid through porous medium. Sharma and Mathura [1] have studied the steady laminar free convections flow of an electrically conducting fluid along a porous hot vertical plate in the presence of heat source/sink. Dash and Rath [2] have studied the problem of laminar flow and heat transfer of an electrically conducting fluid between parallel porous plates by applying explicit finite difference scheme. Walters [3] has studied the Non-Newtonian effects in some elastic-viscous liquids whose behaviour at small rates of shear is characterized by general linear equation of state. Soundalgekar and Takhar [4] analyzed the radiation effects on free convection flow past a semi-infinite vertical plate. Das et.al [5] studied the radiation effects on flow past an impulsively started vertical infinite plate. Hossain and Takhar [6] analyzed the effects of radiation on mixed boundary layer flow near a vertical plate with uniform surface temperature using Rosseland flux model. Unsteady two dimensional laminar flow of a viscous incompressible electrically conducting fluid in the vicinity of semi-infinite vertical porous moving plate was discussed by Kim [7]. Flow and heat transfer of an electrically conducting viscous-elastic fluid between two horizontal squeezing/stretching plates has been studied by Rath et al. [8]. Unsteady MHD free convection and mass transfer flow past an infinite heated porous vertical plate with time dependent suction was discussed by Cookey and Sigalo[9]. Free convection heat and mass transfer from a horizontal cylinder of elliptic cross section in micro polar fluids as been studied by Yang[10].Unsteady flow and heat transfer through an elastic-viscous liquid along an infinite hot vertical porous moving plate with variable free stream suction have been studied by Sharma and Pareek [11]. Toki and Tokis [12] studied exact solution for the unsteady free convection flows on a porous plate with time-dependent heating. MHD flow through a porous medium past a stretched vertical permeable effect of Hall current and chemical reaction on MHD flow along an exponentially porous flat plate with internal heat absorption/generation was studied by Rath.et al.[13]. Sharma and Sharma[14] have studied the unsteady two-dimensional flow and heat transfer through an elastic-viscous liquid along an infinite heat vertical porous surface bounded by porous medium. The main objective of the present investigation is to study the Radiation Effects on Unsteady MHD Flow of A Visco-Elastic Fluid Along Vertical Porous Surface With Heat Source and Chemical Reaction Pavan , G. S. S. Raju