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中文摘要：
用FLUENT软件模拟了三维间隔扇形凹穴型微通道流体层流流动与传热的情况,与等直径矩形微通道进行对比.结果表明：间隔扇形凹穴型微通道由于间隔段的存在降低了通道的整体压降,摩擦系数比f/f0＜1;间隔段的长度明显影响微通道的传热性能,长度越长,传热恶化效果越明显.引入强化传热因子（Nu/Nu0）/（f/f0）0”09,当Re＞ 200时通道1、2的（Nu/Nu0）/（f/f0）0.2909均大于1,说明其综合传热性能优于矩形微通道.
英文摘要：
Three dimension numerical simulations were performed on laminar flow and heat transfer in a microchannel with interrupted fan-shaped reentrant cavities. In contrast to this proposed mierochannel, the corresponding conventional rectangular mierochannel was chosen. The numerical results indicate that the overall pressure drop effectively reduce and the ratio of friction coefficient is less than 1 because of interrupted zones. The performance of heat transfer is significantly affected by the length of interrupted zones. As the interrupted length increases, heat transfer decreases obviously. Then, according to the heat enhancement factor, （ Nu/Nuo ）/（f/fo ）^0.2909, the No. 1 and No. 2 channel both have better overall performance than rectangular microchannel when Re 〉 200.
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