Numerical investigation of cu-water nanofluid in a differentially heated square cavity with conducting solid square cylinder at center

The Present study is an endeavor to laminar flow heat transfer of Cu-water nanofluid inside a square cavity. The cavity is heated by different length heaters with isothermal boundary condition placed symmetrically on two adjacent sides. The moving lid has low temperature and rest of the boundaries are insulated. A thermally conducting solid cylinder is placed at the center of the cavity. The effect of different parameters, nanoparticles volume fraction (0 - 0.08), Richardson Number (0.01- 10) on the fluid flow and temperature fields have been studied. The average Nusselt number increases with the increase in nanoparticle concentration and size of the heater. The effect of concentration of nanoparticles reduces with decrease in Richardson Number.