An integral approach for heat and mass transfer by natural convection from truncated cones in porous media with variable wall temperature and concentration

A study on the combined heat and mass transfer by natural convection from truncated cones embedded in fluid saturated porous media with variable wall temperature and concentration is reported. The integral method is applied to obtain the analytic solution. Results are illustrated graphically for the local Nusselt number, the local Sherwood number, and the reciprocal of the boundary layer thickness ratio. The thickness ratio of the thermal boundary layer to the concentration boundary layer is independent of the exponent of the power function used to describe the wall concentration and concentration. Moreover, the ratio of the thermal boundary layer thickness to the concentration boundary layer thickness increases as the buoyancy ratio is increased for Le ≠ 1.