________________________________________ * Author for correspondence; E-mail: sridharwuriti@kluniversity.in Int. J. Chem. Sci.: 14(4), 2016, 2183-2197 ISSN 0972-768X www.sadgurupublications.com NUMERICAL SOLUTION TO MASS TRANSFER ON MHD FLOW OF CASSON FLUID WITH SUCTION AND CHEMICAL REACTION T. HYMAVATHI a and W. SRIDHAR * Department of Mathematics, K. L. University, Vaddeswaram, GUNTUR (A.P.) INDIA a Department of Mathematics, Adikavi Nannaya University, RAJAHMUNDRY (A.P.) INDIA ABSTRACT In the present work, the effect of mass transfer of a MHD Casson fluid over a porous stretching sheet is discussed in presence of chemical reaction is investigated using keller box method. The resulting nonlinear flow is solved to get a series solution. The variations in velocity and concentration fields are presented for various flow parameters. We further analyzed that the concentration profile decreases rapidly compared with the velocity of the fluid with increase in suction parameter. Key words: Casson fluid, MHD, Suction, Mass transfer, Chemical reaction. INTRODUCTION Generally, non Newtonian fluids are more stable when compared with Newtonian fluids. Hence the study of such fluids is more important. Some examples of non Newtonian fluids are Maxwell fluid, Jeffery fluid, casson fluid, visco-elastic fluid etc. In recent years, casson fluids become more popular in the study of non Newtonian fluids. Tomato soup, jelly, honey, blood of human etc., are some examples of casson fluids. Crane 1 investigated the study of flow past a stretching surface. The recent investigations of Hayat and Qasim 2 about influence of thermal radiation and joule heating on MHD flow of a Maxwell fluid in presence of thermophoresis, Fang et al. 3 about unsteady boundary layers over a stretching surface, Khan and Pop 4 about boundary flow of a nanofluid past a stretching sheet, Hayat et al. 5 about mixed convection flow of a micropolar fluid with radiation and chemical reaction and Ibrahim et al. 6 about chemically reacting MHD boundary boundary layer flow of heat and mass transfer past a moving vertical plate