Laminar Forced Convection of Liquids in Tubes With Variable Viscosity
Laminar Forced Convection of Liquids in Tubes With Variable Viscosity
复制标题
变粘度管内液体的层流强制对流
DOI：
10.1115/1.3684396
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发表时间：
1962
影响因子：
--
通讯作者：
Kwang
中科院分区：
文献类型：
--
作者：
Kwang
采用改进的积分方法，得到了管壁温度阶跃变化和壁面热流阶跃变化情况下，粘性流体在圆管中层流强迫对流的解析解。通过将等温问题的结果与精确解的结果进行比较，证明了该分析方法的准确性。非等温的情况下，结果以图形形式的努塞尔数，在管中心线的速度变化，和摩擦系数。最后给出了Nusselt数的列表。
Analytical solutions for laminar forced convection of liquids flowing in circular tubes with temperature-dependent viscosity are obtained for both step change in tube-wall temperature and step change in wall heat flux by using an improved integral procedure. The accuracy of this analytical procedure is demonstrated by comparing results for the isothermal problems with that from the exact solutions. Results for the nonisothermal cases are presented in graphical forms in terms of Nusselt numbers, velocity variations at tube center line, and friction factors. Finally, tabulated Nusselt numbers are also given.