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アイテム
Revisiting visualization of spiral states in a wide-gap spherical Couette flow
http://hdl.handle.net/10112/0002003506
http://hdl.handle.net/10112/0002003506fa7cda2a-2a12-40be-a667-8b55c16e9087
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KU-1100-20241001-23.pdf (3.8 MB)
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||
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| 公開日 | 2025-11-12 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Revisiting visualization of spiral states in a wide-gap spherical Couette flow | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 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 | |||||||||||||
| アクセス権 | ||||||||||||||
| アクセス権 | open access | |||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||
| 著者 |
板野, 智昭
× 板野, 智昭
WEKO
24078
× 荒井, 一心× 関, 眞佐子
WEKO
24286
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| 概要 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | A pioneering study conducted by Egbers and Rath [Acta Mech. 111 pp. 125–140 (1995)] experimentally captured spiral waves to elucidate the transition in the wide-gap spherical Couette flow. However, the physical field quantities of the spiral waves corresponding to light patterns of various intensities, as obtained in the experiment, remain unclear, and we have yet to move beyond the understanding that the reflected light from shear-sensitive flake tracers responds to a flow that appears at the transition. In this study, the experiment to visualize spiral waves using aluminum flakes, as performed by Egbers and Rath, was numerically reproduced by solving the translational and rotational motions of the particles in a spiral wave. First, the spiral wave in a spherical Couette flow with an aspect ratio η = 1/2 was numerically calculated using the Newton–Raphson method. Subsequently, the image that was numerically reproduced from the spiral wave was compared with an experimentally visualized image. The torque acting on the inner sphere and the phase angular velocity of the spiral waves with various wavenumbers were provided. Attempts have been made to determine the instantaneous physical quantity that corresponds to the light and dark patterns observed in the flow visualization. From the attempts, we concluded the orientation motion of the flakes developed in the advective history of the flow is essential to yield these patterns. Exploring the correlation between flow visualization results and shear structures may provide a new avenue for quantitatively estimating spatial structures and time scales in complex and quickly time-varying flow fields, such as turbulence. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Acta Mechanica 巻 235, 号 12, p. 7441-7452, 発行日 2024-10-01 |
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| ISSN | ||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||
| 収録物識別子 | 00015970 | |||||||||||||
| DOI | ||||||||||||||
| 関連タイプ | isVersionOf | |||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.1007/s00707-024-04098-4 | |||||||||||||
| 権利 | ||||||||||||||
| 権利情報 | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00707-024-04098-4. | |||||||||||||
| 言語 | en | |||||||||||||
| 著者版フラグ | ||||||||||||||
| 出版タイプ | AM | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||
| 出版者 | ||||||||||||||
| 出版者 | Springer Nature | |||||||||||||
| 言語 | en | |||||||||||||
| 助成情報 | ||||||||||||||
| 助成機関名 | Japan Society for the Promotion of Science (JSPS) | |||||||||||||
| 言語 | en | |||||||||||||
| 研究課題番号 | 20K04294 | |||||||||||||
| 研究課題番号URI | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-20K04294/ | |||||||||||||
| 研究課題名 | 球面クエット乱流遷移の数理モデル拡張と実験的検証 | |||||||||||||
| 言語 | ja | |||||||||||||
| 助成情報 | ||||||||||||||
| 助成機関名 | Japan Society for the Promotion of Science (JSPS) | |||||||||||||
| 言語 | en | |||||||||||||
| 研究課題番号 | 24K07331 | |||||||||||||
| 研究課題番号URI | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-24K07331/ | |||||||||||||
| 研究課題名 | LDV・トルクメータ・可視化手法を併用した球面クエット乱流遷移の実験検証 | |||||||||||||
| 言語 | ja | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Spherical Couette flow | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | spiral wave | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | flake visualization | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Newton-Raphson method | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | ja | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | 関西大学 | |||||||||||||
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| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Kansai University | |||||||||||||
