ScholarWorks@성균관대학교

초록

While several studies have experimentally and numerically explored the flow and heat transfer characteristics of manifold microchannel heat sinks, the influence of various combinations of geometric parameters on thermalhydraulic performance and flow uniformity has not yet been thoroughly examined, particularly across a broad design range. Furthermore, research on high-performance manifold microchannel heat sinks capable of handling substantial heat fluxes over large areas using air cooling remains limited, especially for designs that simultaneously achieve uniform flow distribution and minimize pressure drop. Therefore, the present study investigates the effects of a wide range of geometric parameters-microchannel width, length, and height-on the pressure drop, thermal resistance, and flow uniformity characteristics of an air-cooled N-type manifold microchannel heat sink. Three-dimensional numerical analyses are conducted for 58 simulation cases, and the numerical model is validated against experimental data by comparing pressure coefficients. Additionally, the thermal-hydraulic performance is compared with that reported in previous studies, demonstrating the superior performance of the present heat sink. This is attributed to the N-type manifold geometry-which improves flow uniformity and reduces pressure drop-and to enhanced heat transfer resulting from a monolithic all-aluminum structure integrating the microchannels, manifold walls, side fins, and base plate. Overall, the results demonstrate that the N-type manifold microchannel heat sink developed in the current study can dissipate high heat fluxes over large areas using air cooling and is well suited for systems requiring a simple cooling solution, particularly compared with those based on liquid recirculation loops.

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