Abstract
A numerical study of natural convection of cubic cavity filled with micropolar Cu-Al 2 O 3 /water hybrid nanofluid is investigated. The governing equations are expressed with the vorticity-vector potential formulation and then are solved numerically by using the volume finite method. The objective of this present work is to analyzed the performed of Cu-Al 2 O 3 /water micropolar hybrid nanofluid compared with the simple nanofluid. Furthermore, the influence on the flow field and the heat and mass transfer of different parameters, such as the concentration of nanoparticles, the Rayleigh number, and the micropolar vortex parameter are studied. Results show that a combination of Cu with the Al 2 O 3 /water micropolar nanofluid tends to enhance thermal conductivity and dynamic viscosity coefficient. It is also found that both heat and mass transfer increase when hybrid nanofluid, rather than traditional nanofluid, is applied with increasing the solid volume concentration. Moreover the average Nusselt and Sherwood numbers decrease with the enhancement of micropolar vortex parameter.
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