AXISYMMETRIC NATURAL CONVECTION FLOWS RESULTING FROM THE COMBINED BUOYANCY EFFECTS OF THERMAL AND MASS DIFFUSION.

This paper considers the steady, laminar flows which arise due to the simultaneous diffusion of heat and chemical species in axisymmetric flows. The boundary layer equations are shown to have solutions of similarity form for combined buoyancy effects for both power-law and exponential axial temperature variation. The resulting similarity equations are of the same form as for the purely thermal point source plume. Detailed consideration is given to the power-law variation which corresponds to flow with a constant plume convection rate of thermal energy and of diffusing species, both from a common point source, with small levels of species concentration.