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A study of the spatiotemporal structure of a turbulent boundary layer measured by the use of two hot-wire probes (Velocity time series patterns and Kolmogorov's structure function)
https://tokushima-u.repo.nii.ac.jp/records/2012055
https://tokushima-u.repo.nii.ac.jp/records/2012055fd41f81c-5d02-4801-91a1-3df5bfbdc5b8
| 名前 / ファイル | ライセンス | アクション |
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jfst_19_3_JFST0028.pdf (1.73 MB)
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| Item type | 文献 / Documents(1) | |||||||||||||||||
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| 公開日 | 2024-05-30 | |||||||||||||||||
| アクセス権 | ||||||||||||||||||
| アクセス権 | open access | |||||||||||||||||
| 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 | |||||||||||||||||
| 出版社版DOI | ||||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||
| 関連識別子 | https://doi.org/10.1299/jfst.2024jfst0028 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| 関連名称 | 10.1299/jfst.2024jfst0028 | |||||||||||||||||
| 出版タイプ | ||||||||||||||||||
| 出版タイプ | VoR | |||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | A study of the spatiotemporal structure of a turbulent boundary layer measured by the use of two hot-wire probes (Velocity time series patterns and Kolmogorov's structure function) | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 著者 |
一宮, 昌司
× 一宮, 昌司
WEKO
34
× ナカムラ, イクオ
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | The streamwise velocity at two points in a turbulent boundary layer under zero pressure gradient was measured using two hot-wire probes separated in the wall-normal direction. The time trace of the fluctuating velocity difference, probability density function, fluctuating vorticity, structure function, and the spatial correlation coefficient was obtained. First, the physical importance of structure functions was explained in some detail. Then, the results of the measurements were considered. When the spatial separation between two points is small, the fluctuating velocity difference decreases monotonically as the two points move away from the wall. On the other hand, as the spatial separation increases, the similarity between the two fluctuating velocities decreases. In addition, the fluctuating velocity at the nearer point from the wall becomes dominant. When moving away from the wall, the fluctuating velocity difference first increases, then reaches a maximum, and finally decreases. When both positions are within the logarithmic region or defect region, the velocity difference is made between similar fluctuating velocities. Hence, the probability density function distribution shape is symmetrical with respect to positive and negative values, close to the Gaussian distribution. The fluctuating vorticity decreases monotonically as it moves away from the wall, regardless of the spatial separation. The structure function increases as the separation increases. Away from the wall, the length over which the correlation is maintained increases, resulting in a large eddy. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Boundary layer | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Turbulence | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Structure function | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Spatial correlation | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Spatiotemporal structure | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Two-point velocity difference | |||||||||||||||||
| 書誌情報 |
en : Journal of Fluid Science and Technology 巻 19, 号 3, p. JFST0028, 発行日 2024 |
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| 収録物識別子タイプ | ISSN | |||||||||||||||||
| 収録物識別子 | 18805558 | |||||||||||||||||
| 出版者 | ||||||||||||||||||
| 出版者 | 日本機械学会 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| 権利情報 | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 権利情報 | This is an open access article under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). | |||||||||||||||||
| EID | ||||||||||||||||||
| 識別子 | 408524 | |||||||||||||||||
| 識別子タイプ | URI | |||||||||||||||||
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| 言語 | eng | |||||||||||||||||
