Determination of constant viscosity for a power-law melt flow inside a circular tube

被引：6
|
作者：
Luo, Cheng [1 ]
机构：
[1] Univ Texas Arlington, Dept Mech & Aerosp Engn, 500 W First St,Woolf Hall 226, Arlington, TX 76019 USA
来源：
CHEMICAL ENGINEERING SCIENCE | 2019年 / 195卷
关键词：
Power-law melt flow; Non-Newtonian fluid; Viscous heating; Capillary rheometry; Temperature-dependent viscosity; Constant viscosity; MOLTEN POLYMER FLOW; HEAT-TRANSFER;
D O I：
10.1016/j.ces.2018.11.053
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
For a melt flow with viscous heating, a temperature-independent viscosity model is simple to use in estimating its temperature profile. In this model, a constant viscosity is chosen to represent a temperature-dependent one. However, it is still not clear about what value should be selected for the constant viscosity. In this short communication, we derive a relation to find it, followed by validation using existing numerical examples. (C) 2018 Elsevier Ltd. All rights reserved.
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页码：239 / 241
页数：3
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