The heat and mass transfer characteristics of natural convection about a vertical surface embedded in a saturated porous medium subject to variable viscosity are numerically analyzed. by taking into account the diffusion-thermo (Dufour) and thermal-diffusion (Soret) effects. The governing equations of continuity. momentum. https://www.spidertattooz.com/Essie-Garden-Variety-0-5-oz-904-p15641/