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 finite difference method. The
influences of governing parameters, namely, Rayleigh number, Reynolds 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 favorable
comparisons with previously published results. The results of the problem are presented in
graphical and tabular forms and discussed.