Numerical investigation of mixed convective heat transfer for unsteady turbulent flow over heated blocks in a horizontal channel

被引：23

作者：

Perng, Shiang-Wuu ^{[2
]}

Wu, Homg-Wen ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Syst & Naval Mechatron Engn, Tainan 70101, Taiwan

[2] Kun Shan Univ Technol, Dept Accounting Informat, Yung Kang 710, Tainan Hsien, Taiwan

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2008年 / 47卷 / 05期

关键词：

LES; heat transfer enhancement; mixed convection; heated blocks;

D O I：

10.1016/j.ijthermalsci.2007.04.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The turbulent flow field and heat transfer enhancement of mixed convection in a horizontal block-heated channel was investigated, using the Large Eddy Simulation (LES) and SIMPLE-C method coupled with preconditioned conjugate gradient methods. A rectangular turbulator was mounted in the channel to enhance heat transfer by means of an internal flow modification induced by vortex shedding in this study. The width-to-height ratio of turbulator was changed (0.25, 0.5 and 1.0) with a constant Reynolds number (5000) under various Grashof numbers (0-5.OE+8) for the purpose of investigating the heat transfer performance. The results indicate that the turbulator mounted in cross-flow above an upstream block can effectively enhance the heat transfer performance of mixed convection in the horizontal channel. (C) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：620 / 632

页数：13

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