Direct numerical simulation of double diffusive natural convection in a closed mixture cavity heated from below

Abstract

Double diffusive natural convection is one of the most widely used study subjects in heat and mass transfer. In this present study, double diffusive natural convection heating from below the wall in a closed cavity was studied with direct numerical simulation method. The flow characteristics are presented as isotherms, iso concentrations, and streamlines. The results show that RaT has signification strong effects on average Nusselt number, with a more considerable RaT, the value of Nusselt number more higher. These were also found to increase with increasing buoyancy ratio for adding flow and decrease as buoyancy ratio decreases for opposing flows