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Flow structures and drag characteristics of a colony-type emergent roughness model mounted on a flat plate in uniform flow
https://sucra.repo.nii.ac.jp/records/12956
https://sucra.repo.nii.ac.jp/records/12956756ca255-93e8-4d35-83cb-88b748828ff8
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
A1002294.pdf (925.1 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2007-11-09 | |||||
| タイトル | ||||||
| タイトル | Flow structures and drag characteristics of a colony-type emergent roughness model mounted on a flat plate in uniform flow | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | colony type vegetation | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | drag coefficient | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | strouhal number | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | flow structure | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | grid or staggered arrangement | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | flow visualization | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | PIV | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Takemura, Takeshi
× Takemura, Takeshi× 田中, 規夫 |
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| 著者 ローマ字 | ||||||
| 値 | Takemura, Takeshi | |||||
| 著者 ローマ字 | ||||||
| 値 | Tanaka, Norio | |||||
| 著者 所属 | ||||||
| 著者 所属 | ||||||
| 値 | 埼玉大学大学院理工学研究科環境科学・社会基盤部門 | |||||
| 著者 所属(別言語) | ||||||
| 著者 所属(別言語) | ||||||
| 値 | Department of Civil and Environmental Engineering, Saitama University | |||||
| 書誌情報 |
FLUID DYNAMICS RESEARCH 巻 39, 号 9-10, p. 694-710, 発行日 2007 |
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| 年月次 | ||||||
| 値 | 2007-9-10 | |||||
| 出版者名 | ||||||
| 出版者 | ELSEVIER SCIENCE BV | |||||
| 収録物識別子 | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 01695983 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1016/j.fluiddyn.2007.06.001 | |||||
| 関連サイト | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://www.sciencedirect.com/science/journal/01695983 | http://www.sciencedirect.com/science/journal/01695983 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The characteristics of flow structures around a colony-type emergent roughness model, hereafter called 'colony model'. mounted on a flat plate in uniform flow and the drag coefficient C-dc for the colony model are investigated by flow visualization, spectral analysis, velocity measurement and drag force measurement. Two types of colony models. each comprising seven equally spaced cylinders with grid or staggered arrangement are mounted on a water flume bed. The flow structure around the colony model changes depending on LID and G/D (L: space between neighboring cylinders, D: diameter of a cylinder, G: space between cylinders in the cross-stream direction). Two types of flow structures. a large-scale Karman vortex street (LKV) behind the colony models and a primitive Karman vortex street (PKV) behind the individual cylinders, are generated. LKV is formed along the shear layer for G/D < 0.4. When G/D > 1.8 PKV behind each cylinder is stably formed because of the decrease in difference between the velocity through the colony model and that of the detour flow. The velocity through the colony model, which plays a key role for the phenomenon change, strongly increases with G/D at first and then gradually. The tendency of the velocity curve changes around G/D = 1.8 for each arrangement. It almost coincides with the initiation of the formation of PKV. On the other hand, Cdc for the colony model increases in the range of 0.08 < G/D < 0.75 (0.25 < LID < 1) and 0 < G/D < I (I < LID < 3) for the grid and staggered arrangements, respectively. The changing point of the tendency in the C-dc, curve is located in the middle of the transition zone for the two vortex(0.4 < G/D < 1.8). Moreover, the C-dc value for the colony model is nearly constant, independent of the two arrangements, when G/D > 1.8. (c) 2007 The Japan Society of Fluid Mechanics and Elsevier B.V. All rights reserved. | |||||
| 版 | ||||||
| 値 | [著者版] | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | text | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 作成日 | ||||||
| 日付 | 2007-11-09 | |||||
| 日付タイプ | Created | |||||
| アイテムID | ||||||
| 値 | A1002294 | |||||
