Laminar Flow In Rectangular Water-Cooled Minichannel

Khairul Hadi, Misri (2008) Laminar Flow In Rectangular Water-Cooled Minichannel. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

With the rapid development of the information technology (IT) industry, the heat flux in integrated circuit (IC) chips cooled by air hasalmost reached its limit about 100 W/cm². Some applications in high technologies require heat fluxes well beyond such a limitation.Therefore the search of a more efficient cooling technology becomes one of the bottleneck problems of the further development of ITindustry.The minichannel flow geometry offers large surface area of heat transfer and a high convective heat transfer coefficient. However,it has been hard to implement because of its very high pressure head required to pump the coolant fluid though the channels. Anormal channel could not give high heat flux although the pressure drop is very small. A minichannel can be used in heat sink with aquite high heat flux and a mild pressure loss. A rectangular minichannel heat sink with size of 1mm x 1mm is analyzed computationally for single-phase laminar flow of water as coolant through small hydraulic diameter and a constant heat flux boundary condition is assumed. The effect of inlet velocity on pressure drop and thermal resistance are presented. The simulated result is validated with the well establish data in experiment paper and shows that the average of error is 2.712%. Pressure profile along the channel indicates that the pressure gradient is directly proportional to the inlet velocity. The increases of inlet velocity resulting the less heat gain by the water through the channel.

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