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Volumetric evolution of elastic turbulence in porous media
https://oist.repo.nii.ac.jp/records/2873
https://oist.repo.nii.ac.jp/records/28736dba8cfb-56eb-4af8-b445-e7a2d313034f
名前 / ファイル | ライセンス | アクション |
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Carlson-2022-Volumetric evolution of elastic t (1.5 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 | 2022-12-21 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Volumetric evolution of elastic turbulence in porous media | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | microscale transport | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | viscoelasticity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | porous media | |||||
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) |
Carlson, Daniel W.
× Carlson, Daniel W.× Toda-Peters, Kazumi× Shen, Amy Q.× Haward, Simon J. |
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書誌情報 |
en : Journal of Fluid Mechanics 巻 950, p. A36, 発行日 2022-10-26 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Viscoelastic flow instability, which is compelled by elastic effects rather than inertia, can be driven to a chaotic state termed elastic turbulence (ET) manifested as strong velocity fluctuations with an algebraic decay in the frequency spectrum and increased mixing. We report the first spatiotemporally complete description of ET by considering a broad volume within a novel three-dimensional ordered porous medium, reconstructing flow at a micrometre characteristic length scale (Reynolds numbers≪1) via time-resolved microtomographic particle image velocimetry. Beyond a critical Weissenberg number of 2, we observe an elastic flow instability accompanied by an enhanced pressure drop with spectral characteristics typical of ET. Polymer chains in the ET flow state are advected along increasingly curved streamlines between pores such that they accumulate strain and generate a local flow instability evaluated per an established instability criterion based on local evaluation of elastic tensile stress and streamline curvature. The onset of ET leads to increased pore-scale resistance and positive feedback on upstream streamline curvature. ET is thus characterized by a continuous evolution between states of laminar and unstable flow: pores with unstable flow flood their adjacent peers and thus encourage straightened streamlines and flow stability across the array, while positive feedback from flow resistance on streamline curvature results in the instability propagating upstream along the array. By employing a geometrically ordered medium, we permit flow state communication between pores, yielding generalized insights highlighting the significance of spatial correlation and flow history, and thus provide new avenues for explaining the mechanisms of ET. | |||||
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.2022.836 | |||||
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/volumetric-evolution-of-elastic-turbulence-in-porous-media/4FDBF7BB84C2F0A5C615254B9CEA970B | |||||
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 |