TURBULENT FLOW AND HEAT TRANSFER OVER HEATED MODULES FOR A WIDE RANGE OF REYNOLDS NUMBERS AND MODULE SIZE

Abstract

Computational prediction of turbulent fluid flow and heat transfer over heated modules of different sizes in a channel is presented. We assume that the channel is formed between two adjacent circuit boards with surface-mounted heat generating modules mounted on a single side of each board. The pressure drop and heat transfer coefficient over each module are calculated for wide range of Reynolds numbers. The standard k - e model has been used for Reynolds number of 7000 or higher while low Reynolds number model has been used for Reynolds range of 2000–6000. A computational study has been carried out in order to develop performance map for the flow and heat transfer characteristics over various sizes of heated modules (B/L = 0.375 ~ 0.625) and for a wide range of Reynolds number (ReH = 2000 ~ 10,000). The correlation of heat transfer coefficient and pressure drop with Reynolds number and dimension of modules has also been established from this study.