Effect of magnetic obstacle on fluid flow and heat transfer in a rectangular duct

被引：24

作者：

Zhang, Xidong ^{[1
]}

Huang, Hulin ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Acad Frontier Sci, Nanjing 210016, Jiangsu, Peoples R China

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2014年 / 51卷

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

Local magnetic field; Strouhal number; Heat transfer; Constrainment factor; CIRCULAR-CYLINDER; CONVECTION; DYNAMICS; WAKE;

D O I：

10.1016/j.icheatmasstransfer.2014.01.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The vortex dynamics behind various magnetic obstacles and characteristics of heat transfer are investigated using a three-dimensional model. In the numerical study, the magnet width (M-y) is alterable to investigate the instability, Strouhal number, wake structure behind various magnetic obstacles and percentage increment of the overall heat transfer for a wide range of constrainment factors (0.08 <= kappa <= 0.26), Reynolds numbers (400 <= Re <= 900) and interaction parameters (9 <= N <= 15). For all constrainment factors, the fundamental frequency (f) is uniform for a particular value of Reynolds number. Downstream cross-stream mixing due to vortex shedding enhances the wall-heat transfer and the maximum value of percentage increment of the overall heat transfer (HI) is about 20.2%. However, the pressure drop penalty (Delta P-penalty) is not increasingly dependent on interaction parameter when Re and kappa remain constant (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：31 / 38

页数：8

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