MIXED CONVECTION ANALYSIS OF HYBRID NANOFLUID IN A LID-DRIVEN CAVITY WITH A HOT BLOCK INSIDE

The purpose of this study is the investigation heat transfer and fluid flow around a heated solid block inside lid-driven cavity filled with hybrid TiO2-Cu/water nanofluid. considered geometry two-dimensional an aspect ratio 5. upper wall translates uniform velocity Ulid. attached to bottom maintained at high temperature compared lower walls, whereas other walls are kept insulated. nanofluid assumed be Newtonian, laminar, incompressible. effect Richardson number by fixing Reynolds 100, varying Grashof from 102 104. Volume fractions for both nanoparticles varied 0% 8%. Results shown in terms streamlines, isotherms, profiles average Nusselt number. Numerical results show that clockwise counterclockwise cells generated within rectangular enclosure due combined effects natural forced convection. Furthermore, increasing Ri = 0.01 1, which increase buoyancy effect, leads about 4.5%. Moreover, each number, 8% volume fraction enhancement rate 9.8%.