eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2009 21 3 639 650 jusps-B 1180 article J. Gireesh Kumar 1 P.V. Satya Narayana 2 S. Ramakrishna 3 Department of Mathematics, Sree Vidyankethan Engineering College, Tirupati A.P. (INDIA) Department of Mathematics, V.I.T., University, Vellore, Tamil Nadu - (INDIA) Department of Mathematics, Sri Venkateswara University, Tirupati (A.P.) INDIA <p style="text-align: justify;">This paper presents the investigations on the influence of chemical reaction and mass transfer on magneto-hydrodynamic unsteady free convective flow of a viscous, incompressible fluid past an infinite vertical plate through porous media in the presence of constant suction and heat sink. Numerical solution for the flow problem has been obtained by solving the governing equations using multi-parameter perturbation technique. The results are obtained for velocity, temperature and concentration. The effects of various material parameters are discussed on flow variables and presented by graphs.</p> <p>&nbsp;</p> https://ultraphysicalsciences.org/paper/1180/ MHD Chemical reaction Unsteady Vertical Plate Sinks Constant Suction Porous Media.