Multiscale quasi-time-periodic coherent structures in shear flows.
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| Title: | Multiscale quasi-time-periodic coherent structures in shear flows. |
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| Authors: | Song, Runjie1 (AUTHOR), Deguchi, Kengo1,2 (AUTHOR) kengo.deguchi@monash.edu, Kawahara, Genta2,3 (AUTHOR), Hwang, Yongyun1,3 (AUTHOR) |
| Source: | Journal of Fluid Mechanics. 5/10/2026, Vol. 1034, p1-12. 12p. |
| Subjects: | Shear flow, Coherent structures, Vortex motion, Boundary layer (Aerodynamics), Quasilinearization, Reynolds number, Turbulence |
| Abstract: | Attempts to disentangle shear-flow turbulence often focus on identifying relatively simple solutions, such as travelling waves or periodic orbits. We show, however, that capturing multiscale features requires considering states at least as complex as quasi-time-periodic solutions. Approximations of these states can be computed efficiently using a quasi-linear model, consistent with the large-Reynolds-number asymptotic analysis. The quasi-linear structure is key to producing multiscale critical layers that generate vortices obeying Taylor's frozen-flow hypothesis. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193952179 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multiscale quasi-time-periodic coherent structures in shear flows. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Song%2C+Runjie%22">Song, Runjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deguchi%2C+Kengo%22">Deguchi, Kengo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> kengo.deguchi@monash.edu</i><br /><searchLink fieldCode="AR" term="%22Kawahara%2C+Genta%22">Kawahara, Genta</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hwang%2C+Yongyun%22">Hwang, Yongyun</searchLink><relatesTo>1,3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. 5/10/2026, Vol. 1034, p1-12. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Shear+flow%22">Shear flow</searchLink><br /><searchLink fieldCode="DE" term="%22Coherent+structures%22">Coherent structures</searchLink><br /><searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink><br /><searchLink fieldCode="DE" term="%22Boundary+layer+%28Aerodynamics%29%22">Boundary layer (Aerodynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Quasilinearization%22">Quasilinearization</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+number%22">Reynolds number</searchLink><br /><searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Attempts to disentangle shear-flow turbulence often focus on identifying relatively simple solutions, such as travelling waves or periodic orbits. We show, however, that capturing multiscale features requires considering states at least as complex as quasi-time-periodic solutions. Approximations of these states can be computed efficiently using a quasi-linear model, consistent with the large-Reynolds-number asymptotic analysis. The quasi-linear structure is key to producing multiscale critical layers that generate vortices obeying Taylor's frozen-flow hypothesis. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1017/jfm.2026.11500 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1 Subjects: – SubjectFull: Shear flow Type: general – SubjectFull: Coherent structures Type: general – SubjectFull: Vortex motion Type: general – SubjectFull: Boundary layer (Aerodynamics) Type: general – SubjectFull: Quasilinearization Type: general – SubjectFull: Reynolds number Type: general – SubjectFull: Turbulence Type: general Titles: – TitleFull: Multiscale quasi-time-periodic coherent structures in shear flows. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Song, Runjie – PersonEntity: Name: NameFull: Deguchi, Kengo – PersonEntity: Name: NameFull: Kawahara, Genta – PersonEntity: Name: NameFull: Hwang, Yongyun IsPartOfRelationships: – BibEntity: Dates: – D: 10 M: 05 Text: 5/10/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00221120 Numbering: – Type: volume Value: 1034 Titles: – TitleFull: Journal of Fluid Mechanics Type: main |
| ResultId | 1 |
