Comparative heat transfer analysis of Al2 O3 and Cu nanoparticles based in H2O nanofluids flow inside a C-shaped partially heated rectangular cavity

The aim of the current study is to investigate the heat transfer performance of A12O3 and Cu nanoparticles suspended based in H2O nanofluids inside a partially heated C-shaped enclosure. The governing equations for heat and flow transfer are solved using the Finite Element Method. Heat transmission is affected by the type and form of nanoparticles. To study the improved heat transfer performance, four different shapes of nanoparticles-spherical, cylindrical, column, and lamina-have been used. The investigation showed that among the considered shapes of nanoparticles, the lamina shape of nanoparticles performed best. Considering lamina nanoparticles, in comparison to the simple nanofluids A12O3 - H2O and Cu - H2O the hybrid nanofluid A12O3 - Cu - H2O provides the enhanced heat transfer rate. The heat transfer is governed by convection at a higher Rayleigh number. On the other hand, the heat transfer rate is decreasing by increasing the impact of the magnetic field. For the increased heat transfer rate, the best choice is lamina nanoparticles and hybrid nanofluid A12O3 - Cu - H2O.