Mixed convection heat transfer improvement inside a multiple vented cavity crossed by Al2O3-water nanofluid

The goal of this work is to study the laminar mixed convection of water-Al2O3 nanofluid in a multiple vented cavity. The effects of various controlling parameters, such as Reynolds number, 200 £ Re £ 3000, solid volume fraction of nanoparticles, 0 £ f £ 0.7, and mode of imposed external flow (injection and suction) on flow and thermal patterns and resulting heat transfer inside the cavity are investigated. The obtained results show that, the addition of nanoparticles leads to an improvement of heat transfer rate and an increase of mean temperature inside the enclosure. In addition, the suction mode was found to present higher heat performances and better cooling effectiveness, in comparison with the injection one