| Summary: | The aim of present investigation was to study the effects of thermal radiation, viscous dissipation, ohmic dissipation and mass transfer effects on unsteady hydromagnetic boundary layer flow over a stretching surface. The governing equations of momentum, thermal and concentration boundary layers are reduced to a set of ordinary differential equations by means of suitable similarity transformations. Those equations are solved numerically for some arbitrary values of the governing physical parameters such as the Unsteadiness parameter (A), Magnetic interaction parameter (M2), Prandtl number (Pr), Radiation parameter (Rd), Eckert number (Ec) and Schmidt number (Sc) using Runge Kutta method of fourth order along with an efficient shooting method called Nachtsheim Swigert integration technique for the satisfaction of asymptotic boundary conditions. The results obtained are discussed with the help of graphical illustrations. Important physical concepts such as skin friction coefficient, Nusselt number and Sherwood number are also obtained and are discussed in detail. Keywords: Unsteady stretching surface, Radiation heat transfer, Mass transfer, MHD, Viscous dissipation, Ohmic dissipation
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