This paper presents a numerical investigation of laminar mixed convection cooling of heat source embedded on the bottom wall of an enclosure
filled with nanofluids. The transport equations for a Newtonian fluid are solved numerically with a finite volume approach using the SIMPLE
algorithm. The influences of governing parameters, namely, Rayleigh number location and geometry of the heat source, the type of nanofluid and
solid volume fraction of nanoparticles on the cooling performance is studied. The present results are validated by favourable comparisons with
previously published results. The results of the problem are presented in graphical and tabular forms and discussed.