2009年11月
Numerical analysis of the effect of boundary layer thickness on vortex structures and heat transfer in the wake behind a hill
Heat Transfer - Asian Research
- ,
- ,
- ,
- 巻
- 38
- 号
- 7
- 開始ページ
- 435
- 終了ページ
- 449
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/htj.20261
This study presents a three-dimensional numerical analysis of the effect of boundary layer thickness on vortex structures and heat transfer behind a hill mounted in a laminar boundary layer. When the thickness of the velocity boundary layer is comparable to the hill height, a hairpin vortex is formed symmetrically to the center of the spanwise direction in the wake. A secondary vortex is formed between the legs, and horn-shaped secondary vortices appear under the concave parts of the hairpin vortex. When the boundary layer thickness increases, the legs and horn-shaped secondary vortices move toward the center of the spanwise direction, and thus heat transport and heat transfer increase there. At this time, high-turbulence areas generated locally move toward the center of the spanwise direction with an increase in the boundary layer thickness. With a further increase in the boundary layer thickness, steady streamwise vortices are formed downstream of the hill, but the heat transfer decreases. © 2009 Wiley Periodicals, Inc.
- リンク情報
- ID情報
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- DOI : 10.1002/htj.20261
- ISSN : 1099-2871
- ISSN : 1523-1496
- SCOPUS ID : 70349988284