Entropy generation in turbulent liquid flow through a smooth duct subjected to constant wall temperature

被引：87

作者：

Sahin, AZ ^{[1
]}

机构：

[1] King Fahd Univ Petr & Minerals, Dept Engn Mech, Dhahran 31261, Saudi Arabia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2000年 / 43卷 / 08期

关键词：

D O I：

10.1016/S0017-9310(99)00216-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The entropy generation for a fully developed turbulent fluid flow in a smooth duct subjected to constant wall temperature is investigated analytically. The temperature dependence of the viscosity is taken into consideration in the analysis. The ratio of the pumping power to the total heat flux decreases considerably when fluid is heated and the entropy generation per unit heat flux attains a minimum along the duct length for viscous fluids. The results corresponding to the temperature dependent and constant viscosity cases are compared. It is found that constant viscosity assumption may yield a considerable amount of deviation in entropy generation and pumping power results from those of the temperature dependent viscosity cases, especially when highly viscous fluids are considered. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1469 / 1478

页数：10

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