The performance of a new microchannel heat sink(MC-ATC)with triangular cavities and arc-shaped ribs arranged periodically in the Reynolds number range of 147-736 is numerically studied.The effects of the triangular cavities and arc-shaped ribs on velocity and temperature distributions are analyzed by comparing with the rectangular microchannel heat sink(MC-RC),and a comprehensive performance factor is defined to evaluate the performance of the microchannel heat sink.The results show that triangu-lar cavities and arc-shaped ribs have significant effects on enhancing fluid flow and strengthening heat transfer.The overall temperature of MC-ATC is significantly lower and the temperature distribution is more uniform.The low flow velocity area near the channel side wall is also significantly reduced,and the overall flow velocity is significantly increased.When the Reynolds number is 736,the comprehensive per-formance factor of MC-ATC reaches 1.75.
维普
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