Abstract
Heat transfer results for mixed convection from a bottom heated open cavity subject to an external flow are reported in this paper. In addition to heat transfer, effects of the Reynolds number, Grashof number and cavity aspect ratio on the flow stability are investigated. It has been found that the Reynolds number and Grashof number control the flow pattern and the occurrence of recirculating cells while the aspect ratio has a significant influence on the orientation of these cells. The heat transfer rate from the cavity base approaches that of natural convection at a low Reynolds number (asymptotic natural convection regime) and approaches that of forced convection at a high Reynolds number (asymptotic forced convection regime). In the transition regime, the heat transfer rate is reduced and the flow may become unstable. In addition, the heat transfer rate per unit cavity width has been found to be dependent on the aspect ratio.
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