Comprehensive Correlating Equations for Heat, Mass and Momentum Transfer in Fully Developed Flow in Smooth Tubes
Comprehensive Correlating Equations for Heat, Mass and Momentum Transfer in Fully Developed Flow in Smooth Tubes
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DOI：
10.1021/i160061a021
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发表时间：
1977-02
期刊：
影响因子：
--
通讯作者：
S. Churchill
中科院分区：
文献类型：
--
作者：
S. Churchill
A single correlating equation is constructed for the mean Nusselt (or Sherwood) number for all Reynolds and Prandtl (or Schmidt) numbers, and for either uniform wall temperature or a uniform heat flux density. The applicability of this equation is limited to fully developed flow in smooth tubes. However, developing as well as fully developed convection is considered. A corresponding equation is constructed for the friction factor for all Reynolds numbers. These expressions are based on interpolation between the various limiting cases, using the model of Churchill and Usagi. The correlating equations appear to represent available experimental and theoretical values within their uncertainty and to be at least as accurate as prior expressions for restricted ranges of Re and Pr or Sc. The equations are suitable for hand-held computers as well as for incorporation in algorithms for design and optimization.
