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首页> 外文会议>International conference on nanochannels, microchannels and minichannels;ICNMM2011 >GENERALIZED MODELS FOR LAMINAR DEVELOPING FLOWS IN HEAT SINKS AND HEAT EXCHANGERS
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GENERALIZED MODELS FOR LAMINAR DEVELOPING FLOWS IN HEAT SINKS AND HEAT EXCHANGERS

机译：传热和换热器中层流发展的通用模型

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摘要

Recent models for laminar friction and heat transfer in non-circular ducts and channels are reviewed. Mod-els for both hydrodynamically and thermally developing flows are presented. These models are based on the su-perposition of asymptotic characteristics for short and long ducts. The non-dimensional mean wall shear stress (or fRe) and non-dimensional heat transfer coefficient (or Nusselt number) are shown to be only functions the di-mensionless hydrodynamic or thermal duct length, re-spectively, and the duct aspect ratio. This is achieved by means of using a new transversal length scale, the square root of cross-sectional area, rather than the hydraulic diameter. Additional definitions more appropriate to single fluid devices such as heat sinks are also discussed.
机译：审查了非圆形管道和通道中层流摩擦和传热的最新模型。提出了用于水动力流和热力流的模块。这些模型基于短管和长管的渐近特征的叠加。无量纲平均壁面剪应力（或fRe）和无量纲传热系数（或Nusselt数）分别显示仅是无量纲的流体动力或热导管长度以及导管长宽比的函数。这是通过使用新的横向长度刻度（横截面积的平方根）而不是液压直径来实现的。还讨论了更适合于单个流体设备（如散热器）的其他定义。

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