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On the solidity parameter in canopy flows
https://oist.repo.nii.ac.jp/records/2774
https://oist.repo.nii.ac.jp/records/2774e5120a08-bf1c-4c63-9ddc-10893346fe90
名前 / ファイル | ライセンス | アクション |
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Monti-2022-On the solidity parameter in canopy (2.8 MB)
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Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-08-29 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | On the solidity parameter in canopy flows | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | turbulent flows | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | geophysical and geological flows | |||||
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) |
Monti, Alessandro
× Monti, Alessandro× Nicholas, Shane× Omidyeganeh, Mohammad× Pinelli, Alfredo× Rosti, Marco E. |
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書誌情報 |
en : Journal of Fluid Mechanics 巻 945, p. A17, 発行日 2022-08-25 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We have performed high-fidelity simulations of turbulent open-channel flows over submerged rigid canopies made of cylindrical filaments of fixed length l=0.25H (H being the domain depth) mounted on the wall with angle of inclination θ. The inclination is the free parameter that sets the density of the canopy by varying its frontal area. The density of the canopy, based on the solidity parameter λ, is a widely accepted criterion defining the ongoing canopy flow regime, with low values (λ≪0.1) indicating the sparse regime, and higher values (λ>0.1) the dense regime. All the numerical predictions have been obtained considering the same nominal bulk Reynolds number (i.e. Reb=UbH/ν=6000). We consider nine configurations of canopies, with θ varying symmetrically around 0∘ in the range θ∈[±78.5∘], where positive angles define canopies inclined in the flow direction (with the grain) and θ=0∘ corresponds to the wall-normally mounted canopy. The study compares canopies with identical solidity obtained inclining the filaments in opposite angles, and assesses the efficacy of the solidity as a representative parameter. It is found that when the canopy is inclined, the actual flow regime differs substantially from the one of a straight canopy that shares the same solidity, indicating that criteria based solely on this parameter are not robust. Finally, a new phenomenological model describing the interaction between the coherent structures populating the canopy region and the outer flow is given. | |||||
出版者 | ||||||
出版者 | Cambridge University Press | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0022-1120 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1469-7645 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1017/jfm.2022.551 | |||||
権利 | ||||||
権利情報 | © 2022 The Authors. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/on-the-solidity-parameter-in-canopy-flows/08396DA3720AECB732F9DDCC5D68AE3E#article | |||||
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 |