Effect of External Flow Mode on Nanofluid Mixed Convective Cooling Inside a Multi-Vented Cavity

Abstract

The purpose of this paper is to study numerically laminar mixed convection in a multiple vented cavity. This enclosure is continuously heated by constant temperature from the bottom wall, while the other boundaries are presumably thermally insulated. The imposed water-Al2O3 nanofluid flow is injected or sucked. The Influences of various control parameters, e.g.: Reynolds number Re, from 200 to 5000, the solid volume fraction of nanoparticles, , from 0to 7 %, and external flow mode (injection or suction) on the thermal patterns, the flow and the heat transfer within the enclosure are studied. Numerical results revealed that the presence of nanoparticles contributes to enhancement in the heat exchange and increase in the mean temperature within a cavity. Also, it was found that the heat performance and Applying the suction mode enhances the efficiency of cooling compared to the injection mode.