Abstract
A numerical investigation of natural convection flow and heat transfer due to a rectangular heat source flush mounted on a substrate in a liquid-filled square enclosure was conducted. A finite volume model that accounts for the coupled conduction within the substrate and heat source and the natural convection in the liquid was utilized for a wide range of Rayleigh and Prandtl numbers. Little reduction in maximum temperatures was observed when substrate to fluid and component to fluid thermal conductivity ratios were increased beyond 10 and 25, respectively. Computed temperatures using the present model compared favorably with an existing experimental study.
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