Abstract
This survey deals with some steady-state natural convection taking place in a hemispherical enclosure filled with nanofluid consisting of water based metallic nanoparticles, with volumetric fraction ranging between 0% (pure water) and 20%. The hot active wall of the cavity is its horizontal disk subjected to a wide range of constant heat fluxes. The 3D numerical approach is done by means of the finite volume method based on a mixture model. Temperature and velocity distributions are presented for some typical cases and the heat transfer is quantified by means of the Nusselt number versus Rayleigh number. A comparison done between the results with the water and the nanofluid clearly confirms enhancement of the convective heat transfer with the nanoparticles.
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