Heat transfer enhancements of low volume concentration Al2O3 nanofluid and with longitudinal strip inserts in a circular tube

被引：80

作者：

Sundar, L. Syam ^{[1
]}

Sharma, K. V. ^{[1
,2
]}

机构：

[1] JNTUH Coll Engn, Ctr Energy Studies, Hyderabad 500085, Andhra Pradesh, India

[2] Univ Malaysia Pahang, Fac Mech Engn, Pekan 26600, Pahang, Malaysia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2010年 / 53卷 / 19-20期

关键词：

Forced convection in a tube; Aluminum oxide nanofluid; Longitudinal strip inserts; Heat transfer enhancement; Nanofluid friction factor; LAMINAR-FLOW; CONVECTION; FLUIDS;

D O I：

10.1016/j.ijheatmasstransfer.2010.05.056

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The turbulent convective heat transfer and friction factor behavior of Al2O3 nanofluid in a circular tube with different aspect ratios of longitudinal strip inserts are studied experimentally. Experiments are conducted with water and nanofluid in the range of 3000 < Re < 22,000, particle volume concentration 0 < phi < 0.5% and longitudinal strip aspect ratios of 0 < AR < 18. The agreement between the values of Nusselt number obtained with water is satisfactory when compared with the data of Heish and Huang. Results indicate that heat transfer coefficients increase with nanofluid volume concentration and decrease with aspect ratio. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4280 / 4286

页数：7

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