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.hindigyanvishv.com/special-deal-Fluffy-White-Feather-Tinsel-Angel-Halo-quick-deal/