MIXED CONVECTIVE HEAT AND MASS TRANSFER FLOW OF REACTIVE VISCOUS FLUID IN A VERTICAL POROUS PIPE IN THE PRESENCE OF THERMAL DIFFUSION

This paper examined steady state fully developed mixed convective heat and mass transfer flow of reactive viscous fluid in a vertical porous pipe in the presence of thermal diffusion. The nonlinear ordinary differential equations governing the flow are solved using semi-analytical method (perturbation series method). The obtained analytical solutions satisfy the imposed initial and boundary conditions. The effects of Frank-Kamenetskii, sustentation, Soret and mixed convection parameters on dimensionless velocity, temperature and concentration are presented graphically and discussed. The physical quantities of engineering interest such as skin friction, Nusselt number and Sherwood number are also computed. It is found that, Frank-Kamenetskii, thermal diffussion and mixed convection flow governing parameters strongly influence the flow pattern, heat and mass distribution within the pipe.