The effect of radiation on natural convection in slanted cavities of angle γ = 45° and 60°

► Combined radiation and natural convection have been studied in 2D slanted cavity. ► The variable density method and Boussinesq approximation have been used to model the buoyancy. ► The comparison have been made between pure convection, nonparticipative and participative medium. ► The effect of radiation parameters have been studied keeping other variables constant. ► The skewness angle plays a major role in recirculation rate as well as heat transfer rate.