effects of some thermo-physical parameters on free convective heat and mass transfer over vertical stretching surface at absolute zero

effects of some thermo-physical parameters on free convective heat and mass transfer over a vertical stretching surface at lowest level of heat energy in the presence of suction is investigated. the viscosity of the fluid is assumed to vary as a linear function of temperature and thermal conductivity is assumed constant. a similarity transformation is applied to reduce the governing equations into a coupled ordinary differential equations corresponding to the momentum, energy and concentration equations. these equations along with the boundary conditions were also solved numerically using shooting method along with runge-kutta gill method. the effects of thermo-physical parameters on the velocity, temperature and concentration profiles are shown graphically. it is found that with an increase in the value of temperature-dependent fluid viscosity parameter, the velocity increases while the temperature and concentration decreases across the flow region. dufour, soret, frank-kamenetskii, prandtl and schmidt number activation energy also have effect. numerical data for the local skin-friction coefficient, the local nusselt number and the local sherwood number have been tabulated for various values of certain parameter conditions.