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Resonance phenomena of thermo-bioconvection generated by chemotactic bacteria under unsteady heat condition
https://iwate-u.repo.nii.ac.jp/records/2001348
https://iwate-u.repo.nii.ac.jp/records/20013482f33e6a3-2e40-4cd9-aee0-ae8c00f7770e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
arxiv-2505.08156v1.pdf (4.8 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 | 2026-02-04 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Resonance phenomena of thermo-bioconvection generated by chemotactic bacteria under unsteady heat condition | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Bio-fluid mechanics | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Bioconvection | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Thermal convection | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Bacteria | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Oxygen | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Transport phenomena | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Resonance phenomena | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Numerical simulation | |||||||||||||
| 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 | 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 |
柳岡, 英樹
× 柳岡, 英樹 （著）
× 古泉, 大地 （著）
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| 登録日 | ||||||||||||||
| 日付 | 2026-02-04 | |||||||||||||
| 日付タイプ | Created | |||||||||||||
| 書誌情報 |
en : arXiv 発行日 2025-05-13 |
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | Bioconvection is a phenomenon caused by microorganisms with tactic properties. To effectively utilize bioconvection for industrial purposes, it is necessary to find a way to control it. In this study, we performed a three-dimensional numerical analysis of thermo-bioconvection generated by a suspension of chemotactic bacteria under unsteady heating conditions at the bottom. Under unsteady heating conditions, thermal convection and bioconvection coexist, and unsteady thermo-bioconvection occurs around plumes. When the frequency of the temperature fluctuation is low, thermo-bioconvection follows the temperature fluctuation. However, as the frequency increases, the ability of thermo-bioconvection to follow the temperature fluctuation deteriorates. A resonance phenomenon occurs at the frequency where the instability of the suspension owing to the density difference between the bacteria and water is maintained and where thermo-bioconvection can follow temperature fluctuations. At the resonance frequency, the transport characteristics of bacteria and oxygen throughout the entire region within the suspension improve significantly. As the amplitude of temperature fluctuations and thermal Rayleigh number increase, the interference between thermal convection and bioconvection intensifies, leading to a noticeable improvement in transport characteristics owing to the resonance phenomenon. At this time, the amplitude of temperature fluctuations and thermal Rayleigh number do not almost affect the resonance frequency. This study demonstrated the possibility of thermal control of transport properties in bioconvection. | |||||||||||||
| 言語 | en | |||||||||||||
| 出版者 | ||||||||||||||
| 出版者 | Cornell University | |||||||||||||
| 言語 | en | |||||||||||||
| DOI | ||||||||||||||
| 関連タイプ | isIdenticalTo | |||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.48550/arXiv.2505.08156 | |||||||||||||
| 著者版フラグ | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
| 助成情報 | ||||||||||||||
| 助成機関名 | Japan Society for the Promotion of Science | |||||||||||||
| 言語 | en | |||||||||||||
| 研究課題番号タイプ | JGN | |||||||||||||
| 研究課題番号 | 22K03918 | |||||||||||||
| 研究課題番号URI | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K03918/ | |||||||||||||
| 研究課題名 | Numerical Analysis on Thermal Control of Thermo-Bioconvection and Transport Characteristics Generated by Chemotactic Bacteria | |||||||||||||
| 言語 | en | |||||||||||||
| 研究課題名 | 走化性バクテリアによる熱生物対流と輸送特性の熱制御に関する数値解析 | |||||||||||||
| 言語 | ja | |||||||||||||
| 内容注記 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | This work was supported by JSPS KAKENHI Grant Number JP22K03918. | |||||||||||||
| 言語 | en | |||||||||||||
