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Interface-resolved simulations of the confinement effect on the sedimentation of a sphere in yield-stress fluids
https://oist.repo.nii.ac.jp/records/2611
https://oist.repo.nii.ac.jp/records/2611a34d7e94-bd8a-4283-a03b-a3c63fd8273a
名前 / ファイル | ライセンス | アクション |
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paper_V1-am (4.6 MB)
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CC BY-NC-ND 4.0
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International(https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-04-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Interface-resolved simulations of the confinement effect on the sedimentation of a sphere in yield-stress fluids | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Particle | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Elastoviscoplastic material | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Fluid flows | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Confinement | |||||
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) |
Sarabian, Mohammad
× Sarabian, Mohammad× Rosti, Marco E.× Brandt, Luca |
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書誌情報 |
en : Journal of Non-Newtonian Fluid Mechanics 巻 303, p. 104787, 発行日 2022-03-31 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We perform three-dimensional numerical simulations to investigate the confinement effect on the sedimentation of a single sphere in an otherwise quiescent yield stress fluid, in the presence of finite elasticity and weak inertia. The carrier fluid is modeled using the elastoviscoplastic constitutive laws proposed by Saramito (2009). The additional elastic stress tensor is fully coupled with the flow equation, while the rigid particle is represented by an immersed boundary method. The simulations show the faster relaxation of the fluid velocity and the progressive translation of the location of the negative wake downstream of the sphere as the bounding walls are brought closer to the particle. Moreover, the sphere drag decreases by increasing the particle–wall distance. We show that the confinement ratio (ratio of the gap between rigid confining walls and the sphere radius) reaches a critical value beyond which the wall-effect on the particle and flow dynamics becomes negligible. The key finding here is that the critical confinement ratio and the maximum variation of the Stokes drag with confinement ratio are weakly dependent on the level of material elasticity and plasticity for a certain range of material parameters. Finally, we propose an expression for the Stokes drag coefficient, as a function of material plasticity and confinement ratio. | |||||
出版者 | ||||||
出版者 | Elsevier | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0377-0257 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1016/j.jnnfm.2022.104787 | |||||
権利 | ||||||
権利情報 | © 2022 Published by Elsevier B.V. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.sciencedirect.com/science/article/pii/S0377025722000386 | |||||
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 |