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各種情報量と複雑度を用いた混合層の層流―乱流遷移過程の解析（変動渦度と乱れエネルギー散逸率の解析）
https://tokushima-u.repo.nii.ac.jp/records/2008345
https://tokushima-u.repo.nii.ac.jp/records/200834549a7b8fd-fbba-46e1-96c2-d26a6770dc71
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
transjsme_86_890_20-00130.pdf (4.03 MB)
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| Item type | 文献 / Documents(1) | |||||||||||||||||
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| 公開日 | 2020-11-12 | |||||||||||||||||
| 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/transjsme.20-00130 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| 関連名称 | 10.1299/transjsme.20-00130 | |||||||||||||||||
| 出版タイプ | ||||||||||||||||||
| 出版タイプ | AM | |||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | 各種情報量と複雑度を用いた混合層の層流―乱流遷移過程の解析（変動渦度と乱れエネルギー散逸率の解析） | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| タイトル別表記 | ||||||||||||||||||
| その他のタイトル | Various information and complexity measures for analyzing the laminar-turbulent transition process in mixing layer (Analysis of fluctuating vorticity and turbulent energy dissipation rate) | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 著者 |
一宮, 昌司
× 一宮, 昌司
WEKO
34
× 中村, 育雄
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | In this paper, the laminar-turbulent transition process of a mixing layer downstream of a two-dimensional nozzle exit was analyzed based on various information and complexity measures. Shannon entropy, permutation entropy, and approximated Kolmogorov complexity were also obtained. To obtain the Shannon entropy, the temporal probability distribution of the hot-wire output voltage data was determined and analyzed. In addition to the fluctuating velocity, its time derivative and the square of this derivative were analyzed. The Shannon entropy of the time derivative and its square slightly decreased downstream, in accordance with the increase in the time scale of the turbulence. When the length of the extracted data was constant, the permutation entropy of the time derivative and its square increased around the peripheral region of the mixing layer, in accordance with the intermittent nature of the velocity signals. The region is at the 3-4 times farther from the jet centerline than the region where the fluctuating velocity becomes maximum. When the length of the extracted data was varied in accordance with the integral time scale of turbulence, the permutation entropy initially decreased in the potential core and subsequently increased after the disappearance of the potential core, as the transition progressed. The approximated Kolmogorov complexity of the time derivative and its square were smaller than that of the fluctuating velocity. Owing to the simplification of the data, they slowly increased after the disappearance of the potential core and then quickly decreased after the development of turbulence. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Transition | |||||||||||||||||
| 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 | Turbulent flow | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Shannon entropy | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Permutation entropy | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Kolmogorov complexity | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Mixing layer | |||||||||||||||||
| 書誌情報 |
ja : 日本機械学会論文集 en : Transactions of the JSME (in Japanese) 巻 86, 号 890, p. 20-00130, 発行日 2020-10-25 |
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| 収録物ID | ||||||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||||||
| 収録物識別子 | 21879761 | |||||||||||||||||
| 出版者 | ||||||||||||||||||
| 出版者 | 日本機械学会 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| EID | ||||||||||||||||||
| 識別子 | 372293 | |||||||||||||||||
| 識別子タイプ | URI | |||||||||||||||||
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| 言語 | jpn | |||||||||||||||||
