Numerical Investigation of Mixed Convection incorporating Ag-H2O Nanofluid inside Square Enclosure for Different Heater Locations

The present study is an attempt to elucidate mixed convection flow in a shear driven enclosure incorporating silver nanofluid with a square cylindrical heat source placed at several locations. The simplicity from the point of view of computational expense has been achieved by carrying out 2-D simulations using the finite volume method. The effects of the change in heat source locations are studied observing the isotherms and average Nusselt number with respect to the concentration of silver in the nanofluid (0%, 1%, 3%, and 5%) and Richardson number (0.01, 0.1, 1 and 10) as decisive parameters. Prandtl number and Grashof number have been fixed to 6.2 and 10(4) respectively. The investigation is undertaken for five different locations of the square cylindrical heater. The study shows that maximum heat dissipation at higher Reynolds number occurs when the heater is placed near the bottom right corner of the enclosure; whereas in case of low Reynolds number, the heater when placed near the top left a corner of the enclosure yields maximum heat transfer. The investigation also yields a positive correlation between average Nusselt number with increasing silver concentration.