层流
牛顿流体
传热
非牛顿流体
机械
湍流
热力学
丘吉尔-伯恩斯坦方程
广义牛顿流体
材料科学
物理
努塞尔数
流变学
雷诺数
剪切速率
作者
J.P. Hartnett,M. Kostic
出处
期刊:Advances in heat transfer
日期:1989-01-01
卷期号:: 247-356
被引量:269
标识
DOI:10.1016/s0065-2717(08)70214-4
摘要
This chapter provides an overview of the analytical and experimental hydrodynamics and heat transfer studies of Newtonian and non-Newtonian fluids in laminar and turbulent flow through rectangular tubes. The chapter in particular focuses on the rectangular duct geometry, with emphasis on the friction factor and heat transfer behavior of non-Newtonian fluids. It is recognized that non-Newtonian behavior is generally more complicated than Newtonian flow. In the case of non-Newtonian fluids, the theoretical predictions yield low estimates of the heat transfer under laminar flow conditions. The fact that the available experimental heat transfer measurements lie above the predictions could reflect an inadequacy in the analytical model. For non-Newtonians in turbulent flow through rectangular channels, the situation is even more complicated. Some non-Newtonian fluids act as pseudoplastics, showing some reduction in friction and heat transfer as compared with a Newtonian fluid. Other non-Newtonian fluids experience large reductions in the friction factor and in heat transfer under turbulent flow conditions.
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