Abstract
Because micro-channel has the advantages of small volume, low flow velocity and high efficiency, with the rapid development of miniaturization industry, micro heat sink is widely used. Previous studies have shown that the micro-channel heat transfer performance is mainly determined on its geometric and flow condition, and compared with triangle and trapezoid shape, rectangle structure has better heat transfer performance.Based on the finite element software ANSYS Workbench, micro-channel heat sink with the length of 40mm and different cross-sectional dimension are analyzed numerically, the dimension of micro-channel with smaller pressure drop and high heat transfer is gained. For the optimized model, when a given initial temperature 298K, flow rate of 1.5×10-4kg/s, the substrate give heat flux as 187500 W/m2. The heat flux of 5532W/m2 can be dissipated, the pressure drop is reduced to 230.2Pa, and the heat transfer rate is 5.254W, so this micro-channel heat sink has good working performance.
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