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微通道内分叉流动换热特性研究

Study on the Characteristics of Heat and Fluid Flow in Microchannel Bifurcation
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摘要 本文建立了具有分叉结构的微通道内层流流动换热理论模型并进行了数值求解,分析讨论了分叉处的流动和换热特性,给出了微通道内分叉处附近的沿程压降和Nusselt数分布。数值模拟结果表明:在具有分叉结构的微通道内,在分叉后通道壁面附近产生了回流现象,导致分叉处压降产生波动。由于分叉流动,使得分叉后流动热边界层的重新生成和流体冲刷作用导致了微通道内的整体流动换热得到了强化。 A model of heat and fluid flow in microchannel with bifurcation was developed and analyzed numerically to investigate the characteristics of heat transfer and fluid flow in bifurcation. The pressure drop and Nusselt number along the stream were presented. The simulation results indicate that, the fluctuation of pressure drop in bifurcation is founded due to the form of recirculation at the wall after bifurcation in microchannel. The whole heat transfer performance for microchannel is enhanced due to the regeneration of thermal boundary and the effect of cross flow occurring in the microchannel with bifurcation.
作者 付盼盼
机构地区 东南大学能源与环境学院
出处 《建筑热能通风空调》 2010年第2期45-48,共4页 Building Energy & Environment
关键词 微通道 分叉 流动换热 microchannel, bifurcation, heat and fluid flow
分类号 TK124 [动力工程及工程热物理—工程热物理]
  • 相关文献

参考文献9

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二级参考文献8

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共引文献3

建筑热能通风空调
2010年 第2期

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