Unsteady MHD free convection flow past an impulsive vertical plate in a stratified porous medium with chemical reaction and heat generation

This study analytically investigates the impact of thermal stratification on unsteady MHD flow along an infinite vertical plate in a porous medium, incorporating chemical reaction, and heat source. Using the Laplace transform method, exact solutions for velocity, temperature, and concentration profiles were derived, offering a novel approach without approximations. Results show that increased stratification significantly reduces velocity and temperature profiles, with peak velocity decreasing by approximately 35% compared to the non-stratified case (γ=0). Higher Darcy number enhances heat transfer, as reflected in an increased Nusselt number. These findings offer critical insights for optimizing thermal and mass transfer systems in industrial applications, such as cooling processes, energy optimization, and pollution control.