摘要：Investigation of mixed convection heat transfer of Al2O3-water nanofluid with variable properties inside Lid-driven cavity contain a heated square obstacle has been done numerically in this article. The governing equations are solved utilizing the finite volume method and SIMPLER algorithm. Using the developed code, the effects of solid volume fraction and Richardson number on the flow and thermal fields and heat transfer inside the cavity are investigated. In this research, four edged obstacle is placed exactly on center of low bottom wall, while diameter of nanoparticle is 47 nanometers, diameters ratio is 0.007, Grashof number is constant and supposed to be equal by 104.The results indicate that the average Nusselt number for all range of solid volume fraction increases with decrease in the Richardson number.
