hall effects on flow past an exponentially accelerated infinite isothermal vertical plate with mass diffusion

The effects of hall current and rotation on unsteady hydro magnetic free convection flow past anexponentially accelerated infinite vertical plate with uniform temperature and variable mass diffusion hasbeen discussed. the flow is induced by a general time-dependent movement of the vertical plate, and thecases of ramped temperature and isothermal plates are studied. the governing partial differential equationshave been derived for the velocity, temperature, concentration profiles by laplace transform technique. thesolutions that have been obtained are expressed in simple forms in terms of elementary function andcomplementary error function. expressions for velocity, temperature and concentration fields are obtained.the obtained results are discussed with the effect of various parameters like rotation parameter, hallparameter, hartmann number, schmidt number, radiation parameter thermal grashof number and massgrashof number. the numerical values of primary and secondary velocities are displayed graphically. thetemperature and concentration distributions are discussed numerically and presented through graphs.