Thermal Radiation Effect on Unsteady Convection and Mass Transport Over a Stretching Sheet in a Saturated Porous Medium With Chemical Reaction

The impact of chemical reaction on unsteady convection and mass transport over a stretching sheet in a saturated permeable medium with the thermal radiation effect has been examined numerically. The governing partial differential equations (PDEs) have been converted into ordinary differential equations (ODEs) by using the local similarity transformation. The converted governing ODEs have been then solved numerically using the shooting technique in ‘ODE45 MATLAB’ software. The influence of emerging dimensionless numbers/parameters such as the thermal radiation parameter \(\left(R\right)\), Prandtl number \(\left(Pr\right)\), Schmidt number \(\left(Sc\right)\), Darcy number \(\left(Da\right)\) and chemical reaction parameter \(\left({K}_{r}\right)\) etc. on the flow, concentration and temperature distributions are presented and discussed. The fluid velocity decreases for uplifting values of the Darcy number. The fluid temperature enhances for rising values of the thermal radiation parameter. The concentration reduces for rising values of the chemical reaction parameter. The local skin-friction coefficient decreases about 21% due to increasing the Darcy number (0.6–1.6). The heat transfer rate decreases about 25%, and increases about 22% due to increasing the thermal radiation parameter (0.5-1.0) and the Prandtl number (0.71-1.0), respectively. The mass transfer rate increases about 9%, and 46%, due to increasing the chemical reaction parameter (0.5-1.0), and the Schmidt number (0.5-1.0), respectively. Finally, we compared our numerical results with previously published literature and observed to be a good agreement.