Mixed Convection Heat Transfer Of Cuo-H2o Nanofluid In A Triangular Lid-Driven Cavity With Circular Inner Body

Combined free-forced convection heat transfer of CuO-H2O nanofluid in a triangular cavity having an insulated circular body has been numerically studied. The top base wall is isothermally heated at Th and moved at a constant speed. While the other walls of triangle are maintained at a cold temperature Tc. Fluent 6.3 commercial program is used to solve the mass, momentum, and energy equations subjected to dimensionless boundary conditions. The present results are compared with the previous results for validation and it is found to be in an excellent agreement. The values of Richardson number taken in this study are 0.1, 1.0, 10. The temperature gradient in Grashof number is fixed at ∆𝑇 =10 K. The range of nanoparticles volume fraction extends from 𝜑 = 0 𝑡𝑜 0.15. It is concluded that the overall and average heat transfer rate increase with increase in nanoparticles volume fraction and decrease in Richardson number.