Abstract
This paper describes the effect of design parameters on natural convection from horizontal heated plates in an enclosure. The effects of the heat generation and the enclosure height were examined experimentally. The results show that flow characteristics have two distinctive patterns. One includes vortex motion. The other is circulated along the heated surface. The increase of the heat generation develops the vortex motion and enhances the heat transfer. The heat transfer is independent of the height of adjacent air space. In all the heated surfaces, average Nusselt number is related to modified Rayleigh number.
