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Effect of finite Weissenberg number on turbulent channel flows of an elastoviscoplastic fluid
https://oist.repo.nii.ac.jp/records/2334
https://oist.repo.nii.ac.jp/records/23343dc0ac47-fcfc-42a1-af63-6446b33befb1
名前 / ファイル | ライセンス | アクション |
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main_notiff-am (6.7 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-10-18 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Effect of finite Weissenberg number on turbulent channel flows of an elastoviscoplastic fluid | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | plastic materials | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | viscoelasticity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | turbulence 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 | journal article | |||||
著者(英) |
Izbassarov, Daulet
× Izbassarov, Daulet× Rosti, Marco E.× Brandt, Luca× Tammisola, Outi |
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書誌情報 |
en : Journal of Fluid Mechanics 巻 927, 号 A45, 発行日 2021-10-01 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Direct numerical simulations are carried out to study the effect of finite Weissenberg number up to Wi=16 on laminar and turbulent channel flows of an elastoviscoplastic (EVP) fluid, at a fixed bulk Reynolds number of 2800 . The incompressible flow equations are coupled with the evolution equation for the EVP stress tensor by a modified Saramito model that extends both the Bingham viscoplastic and the finite extensible nonlinear elastic-Peterlin (FENE-P) viscoelastic models. In turbulent flow, we find that drag decreases with both the Bingham and Weissenberg numbers, until the flow laminarises at high enough elastic and yield stresses. Hence, a higher drag reduction is achieved than in the viscoelastic flow at the same Weissenberg number. The drag reduction persists at Bingham numbers up to 20, in contrast to viscoplastic flow, where the drag increases in the laminar regime compared with a Newtonian flow. Moreover, elasticity affects the laminarisation of an EVP flow in a non-monotonic fashion, delaying it at lower and promoting it at higher Weissenberg numbers. A hibernation phenomenon is observed in the EVP flow, leading to large changes in the unyielded regions. Finally, plasticity is observed to affect both low- and high-speed streaks equally, attenuating the turbulent dissipation and the fragmentation of turbulent structures. | |||||
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 | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1017/jfm.2021.789 | |||||
権利 | ||||||
権利情報 | © 2021 The Author(s) | |||||
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/effect-of-finite-weissenberg-number-on-turbulent-channel-flows-of-an-elastoviscoplastic-fluid/4512F46D1835F99731C57B11BA8AB756 | |||||
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 |