Unsteady Three Dimensional Free Convection Heat
and Mass Transfer Flow Embedded in a Porous Medium
with Periodic Permeability and Constant Heat and Mass
Flux studied by Jain, Chaudhary, and Vijay . Heat and
mass transfer free convection between two vertical walls
filled with porous materials having periodic temperature on
a wall investigated by Mishra and Mustaph .r67tr76rftytyde65redrtsxersawe4a4eara4a4wa
Keywords : Free Convection, Heat and Mass transfer, Porous Medium, perturbation technique, Periodic temperature and concentration.