An experimental study an forced convection heat transfer from flush-mounted discrete heat sources

Experiments have been performed using water to determine the single-phase f orced convection heat transfer from in-line four simulated electronic chips , which are flush-mounted to one wall of a vertical rectangular channel. Th e effects of the most influential geometric parameters on heat transfer inc luding chip number, and channel height are tested. The channel height is va ried over values of 0.5, 0.7, and 1.0 times the heat source length. The hea t flux is set at the three values of 5 W/cm(2), and 20 W/cm(2), and the Rey nolds number based on the heat source length ranges from 6 x 10(2) to 8 x 1 0(4). Transition Reynolds numbers are deduced from the heat transfer data. The experimental results indicate that the heat transfer coefficient is aff ected strongly by the number of chips and the Reynolds number and weakly by the channel height. Finally, the present results from liquid-cooling are c ompared with other results from air-cooling, and Prandtl number scaling bet ween air and water is investigated.