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Inverse Interscale Transport of the Reynolds Shear Stress in Plane Couette Turbulence
Tokyo Univ Sci, Yamazaki 2641, Noda, Chiba 2788510, Japan..
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0002-1146-3241
2018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, no 24, article id 244501Article in journal (Refereed) Published
Abstract [en]

Interscale interaction between small-scale structures near the wall and large-scale structures away from the wall plays an increasingly important role with increasing Reynolds number in wall-bounded turbulence. While the top-down influence from the large-to small-scale structures is well known, it has been unclear whether the small scales near the wall also affect the large scales away from the wall. In this Letter we show that the small-scale near-wall structures indeed play a role to maintain the large-scale structures away from the wall, by showing that the Reynolds shear stress is transferred from small to large scales throughout the channel. This is in contrast to the turbulent kinetic energy transport which is from large to small scales. Such an "inverse" interscale transport of the Reynolds shear stress eventually supports the turbulent energy production at large scales.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 120, no 24, article id 244501
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-231709DOI: 10.1103/PhysRevLett.120.244501ISI: 000434937000013PubMedID: 29957007Scopus ID: 2-s2.0-85048624827OAI: oai:DiVA.org:kth-231709DiVA, id: diva2:1240575
Note

QC 20180821

Available from: 2018-08-21 Created: 2018-08-21 Last updated: 2020-03-09Bibliographically approved

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Alfredsson, P. Henrik

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Linné Flow Center, FLOWFluid PhysicsCompetence Center for Gas Exchange (CCGEx)Solid Mechanics (Dept.)SeRC - Swedish e-Science Research Centre
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