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Controlled symmetry breaking and vortex dynamics in intersecting flows
https://oist.repo.nii.ac.jp/records/976
https://oist.repo.nii.ac.jp/records/9769db7fc2a-5d66-40e0-82d6-55f8af7efaba
名前 / ファイル | ライセンス | アクション |
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Burshtein-2019-Controlled symmetry breaking an (5.5 MB)
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Creative Commons
Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-07-02 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Controlled symmetry breaking and vortex dynamics in intersecting flows | |||||
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 | |||||
著者(英) |
Burshtein, Noa
× Burshtein, Noa× Shen, Amy Q.× Haward, Simon J. |
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書誌情報 |
en : Physics of Fluids 巻 31, 号 3, p. 034104, 発行日 2019-03-07 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Vortices are a ubiquitous feature in complex flows and turbulence, but their dynamics are challenging to study due to their typically transient nature. Here, we perform a detailed study of the vortex dynamics and interactions associated with a symmetry breaking flow instability at a 4-way intersection. By precisely controlling the flow rate (hence the Reynolds number, Re) of the flow about a critical value, we are able to induce the merging of two co-rotating vortices into a single structure and similarly to induce a single vortex to split into two. Using quantitative flow velocimetry, both processes are recorded with high spatial and temporal resolution. We find that both the merging and the splitting of vortices are exponential processes, with a rate that depends on the imposed Re. The vortex dynamics in our system are intimately connected with the symmetry-breaking transition and are affected by the degree of vortex confinement, which we control by varying the aspect ratio (alpha) of the flow geometry. We show how the confinement affects the fundamental nature of the flow transition, which varies from super through subcritical as a is increased. Our results are of direct relevance to understanding and predicting flow transitions and vortex dynamics in flow intersections, particularly in confined environments such as in microfluidic (lab-on-a-chip) devices and in the circulatory system, and may be relevant to the prediction of vortex interactions in general. | |||||
出版者 | ||||||
出版者 | AIP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1070-6631 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1089-7666 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1063/1.5087732 | |||||
権利 | ||||||
権利情報 | © 2019 Author(s). | |||||
情報源 | ||||||
関連名称 | https://creativecommons.org/licenses/by/4.0/ | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://aip.scitation.org/doi/full/10.1063/1.5087732 | |||||
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 |