IOSR Journal of Mathematics (IOSR-JM) e-ISSN: 2278-3008, p-ISSN:2319-7676. Volume 8, Issue 6 (Nov. – Dec. 2013), PP 62-66 www.iosrjournals.org www.iosrjournals.org 62 | Page Effects of Chemical Process on Dissipative Radiative MHD Flow through a Porous Medium over a Non-Isothermal Stretching Sheet with Heat Generation M. Venkateswarlu 1 , G.V. Ramana Reddy 2 and D.V.Lakshmi 3 1 Department of Mathematics,V.R.Siddhartha Engineering College, Kanur, Krishna (Dt,),A,.India,Pin-520007 2 Department of Mathematics,K. L.University, Guntur (Dt),A.P,India,Pin -522502 3 Department of Mathematics, Bapatla women Engineering College, Bapatla,Guntur (Dt),A.P,India,Pin-522101 Abstract: The steady two dimensional radioactive MHD boundary layer flow of an electrically viscous, incompressible, conducting fluid caused by a non-isothermal linearly stretching sheet placed at the bottom of fluid saturated porous medium in the presence of viscous dissipation, heat generation and chemical reaction is studied. The governing system of partial differential equations is converted to ordinary differential equations by using the similarity transformations and then solved by shooting method. The dimensionless temperature, velocity, and concentration are computed for different thermo physical parameters viz the magnetic parameter, permeability parameter, , wall temperature parameter radiation parameter, Prandtl number, heat generation parameter, Eckert number, Schmidt number and chemical reaction. Keywords: Chemical reaction, Eckert number, Permeability parameter, Porous medium, Shooting method. I. INTRODUCTION The fluid flows with chemical reaction have attracted the attention of engineers and scientists in the present times. This kind of flows have key importance in many processes including drying evaporation at the surface of a water body, energy transfer in a wet cooling tower, flow in a desert cooler, generating electric power, food processing, groves of fruit trees, crops damage because of freezing etc. There also molecular diffusion of species in the presence of chemical reaction within or at the boundary during several practical diffusive operations. There are two kinds of changes namely homogeneous and heterogeneous. A homogeneous reaction takes place uniformly in the entire given phase whereas a heterogeneous reaction exists in a restricted region or within the boundary of a phase. The smog formation is an important example representing a first order homogeneous chemical change. Many researchers in view of such facts are engaged for the discussion of flows with chemical reactions. . For-instance Seddeek and Almushigeh [1] studied the radiation and variable viscosity effects on MHD free convective over a stretching sheet in presence of chemical reaction. Kandasamy et al. [2] presented group analysis for Soret and Dufour effects on free convective heat and mass transfer with thermophoresis and chemical reaction over a porous stretching surface in the presence of heat source/sink. Pal and Talukdar [3] presented the combined effects of Joule heating and chemical reaction on unsteady magnetohydrodynamic mixed convection with viscous dissipation over a vertical plate in the presence of porous media and thermal radiation. Joneidi et al. [4] presented analytical treatment of MHD free convection flow over a stretching sheet with chemical reaction.Vyas [5] investigated the radiation effect on MHD flow over a non- isothermal stretching sheet in a porous medium. The objective of this paper was to explore the effects of viscous dissipation, thermal radiation, heat generation and chemical reaction on MHD boundary layer flow over a non-isothermal stretching sheet embedded in porous medium. Using a similarity approach, the governing equations are transformed into nonlinear ordinary equations and solved numerically using shooting technique along with fourth-order Runge- Kutta method. The pertinent results are displayed graphically and discussed quantitatively. II. Mathematical Model Figure A : Physical model