Transient free convection flow past an impulsively started isothermal vertical cylinder with mass flux

This paper concern with the laminar flows, which arise in fluids due to the interaction of the force of gravity and density differences, caused by tem perature differences and material or phase constitution for both air and wa ter. A solution of laminar boundary layer equations has been obtained for t he transient free convective flow past an impulsively started semi-infinite isothermal vertical cylinder with uniform mass flux. The solutions of the dimensionless, unsteady, coupled and non-linear governing partial different ial equations are obtained by a more accurate, unconditionally stable and f ast converging implicit finite difference scheme. The results show many int eresting effects on velocity, temperature and concentration profiles and lo cal as well as average shear stress, rate of heat and mass transfer. It is observed that there is a rise in the velocity due to the presence of mass d iffusion.