Asian Journal of Current Engineering and Maths 3: 6 November – December (2014) 66 – 71. Contents lists available at www.innovativejournal.in ASIAN JOURNAL OF CURRENT ENGINEERING AND MATHS Journal homepage: http://innovativejournal.in/ajcem/index.php/ajcem 66 CHEMICAL REACTION EFFECTS ON MHD FREE CONVECTIVE FLOW PAST AN INCLINED PLATE R. Mohana Ramana 1 , J. Girish Kumar 2 1 Assistant Professor of Mathematics, Sree Vidyanikethan Engineering College, Tirupati. 2 Lecturer in Mathematics, Govt. Degree College, Jammalamadugu, Kadapa (Dt.) ARTICLE INFO ABSTRACT Corresponding Author J. Girish Kumar Lecturer in Mathematics, Govt. Degree College, Jammalamadugu, Kadapa (Dt.) jgireeshkumar@yahoo.co.in Key Words: MHD, Chemical reaction, porous medium, Buoyancy ratio etc. DOI:http://dx.doi.org/10.15520/aj cem.2014.vol3.iss6.12.pp66-71. Aim of this paper is to investigate the chemical reaction effects on transient MHD free convective flow of a viscous incompressible electrically conducting fluid along an inclined isothermal non-conducting plate in the presence of transverse magnetic field and viscous dissipation. The dimensionless governing equations are unsteady coupled and non-linear partial differential equations. An analytic method fails to give a solution. Hence an explicit finite difference scheme of DuFort - Frankel method, which is unconditionally stable is employed. The effect of the chemical parameter (Kr), magnetic parameter (M), buoyancy ratio parameter (N), Schmidt number (Sc), Eckert number (Ec) on the velocity, temperature and concentration fields are extensively discussed with the help of graphs. ©2014, AJCEM, All Right Reserved. INTRODUCTION Transport of momentum and energy in fluid- saturated porous media with low porosities are commonly described by Darcyǯs model for conservation of momentum and by an energy equation based on the velocity field found from this model by Kaviany [1]. In contrast to rocks, soil, sand, and other media that do fall in this category, certain porous material, such as foam metal and fibrous media, usually have high porosity. Raptis [2] studied mathematically the case of time varying two-dimensional natural convection heat transfer of an incompressible electrically conducting viscous fluid through a high porous medium bounded by an infinite vertical porous plate. The combined heat and mass transfer problems with chemical reaction are of importance in many processes and, therefore, have received a considerable amount of attention in recent years. In processes, such as drying, evaporation at the surface of a water body, energy transfer in a wet cooling tower, and the flow in a desert cooler, the heat and mass transfer occurs simultaneously. Muthucumaraswamy and Ganesan [3] studied the effect of chemical reaction and injection on the flow characteristics in an unsteady upward motion of an isothermal plate. Magnetohydrodynamic (MHD) is currently going through a period of great enlargement and differentiation of subject matter. The interest in magneto-hydrodynamic (MHD) convection with heat transfer is renewed due to its importance in the design of MHD generators, and accelerators in geophysics, in the design of underground water and energy storage systems, soil sciences, astrophysics and so on. Several scholars have shown their interest in MHD flows because of their varied applications. Singh [4] examined the heat and mass transfer in MHD boundary layer flow past an inclined plate with viscous dissipation in porous medium. Saidul Islam et al. [5] have analyzed the MHD free convection and mass transfer flow with heat generation through an inclined plate. Anand Rao and Shivaiah [6] noticed that the chemical reaction effects on an unsteady MHD free convective flow past an infinite vertical porous plate with constant suction and heat source or generation. Gireesh Kumar et al. [7] have examined the effects of the chemical reaction and mass transfer on MHD unsteady free convection flow past an infinite vertical plate with constant suction and heat sink. Satya Narayana and Sravanthi [8] have discussed the influence of variable permeability of unsteady MHD convection flow past a semi-infinite inclined pate with thermal radiation and chemical reaction. Sharma et al. [9] have discussed the influence of chemical reaction and radiation on unsteady MHD free convective flow and mass transfer through viscous incompressible fluid past a heated vertical plate immersed in porous medium in the presence of heat source. Reddy et al. [10] have analyzed the radiation and chemical reaction effects on MHD heat and mass transfer flow inclined porous heated plate. Israel-Cookey et al. [11] have discussed the influence of viscous dissipation and radiation on unsteady MHD free convection flow past an infinite heated vertical plate in a porous medium with time