Effect of Chemical Reaction on a Transient MHD Flow Past an Impulsively Started Vertical Plate with Ramped Temperature and Concentration

摘要

A parametric study to investigate the effect of first order chemical reaction on a transient MHD free convective mass transfer flow of an incompressible viscous electrically conducting, Newtonian non-Gray fluid past a suddenly started infinite vertical plate with ramped wall temperature and concentration in presence of appreciable radiation heat transfer and uniform transverse magnetic field is presented. The fluid is assumed to be optically thin and the Magnetic Reynolds number considered small enough to neglect the induced hydro magnetic effects. The equations governing the flow are solved by adopting Laplace Transform technique in closed form. Detailed computations of the influence of chemical reaction on the variations in the fluid velocity, fluid concentration, and skin friction and Sherwood number at the plate are demonstrated graphically for various values of the physical parameters involved in the problem and the results are physically interpreted. It is observed that the fluid motion is retarded due to the effect of chemical reaction irrespective of the plate temperature being ramped or isothermal.