Abstract
A review on three convection modes, forced, natural or free and mixed, is made related to laminar and turbulent direct air and liquid cooling channel flow, for application to cooling of electronic systems, and with emphasis on useful correlations. The scope covers single-phase flow over plain heaters, protruded heaters and wall heating. For forced convection, the review continues from the previous review, and describes work from 1995 onward. It is observed that protruded heater distorts the flow in the channel, causing a substantial increase in heat transfer. In natural convection, the methods of cooling and channel aspect ratio strongly affect the heat transfer. In the mixed regime, the location of the heater is less important, and at low Reynolds number, heat transfer is mainly controlled by the Grashof number. However, there are still inconsistent findings among reported results. Keywords : Forced, Natural and Mixed Convection Heat Transfer, Discrete Heat Sources, Electronics Cooling, Channel Flow.
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