Abstract
Turbulent natural convection and surface radiation in a square cavity with a heat source have been investigated by the finite difference method. A parametric study has been carried out to examine the effect of surface emissivity of both cavity walls and heater surfaces on fluid flow and heat transfer. Detailed results were discussed regarding the flow and temperature distributions and average Nusselt number profiles. The developed computational code has been verified for several benchmark problems. The results show that the average convective Nusselt number decreases slightly with surface emissivity. The surface radiation modifies the flow pattern and temperature fields.
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