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Recurrent Bursts via Linear Processes in Turbulent Environments
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0002-9819-2906
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0001-9627-5903
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0001-7864-3071
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2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 14, 144502- p.Article in journal (Refereed) Published
Abstract [en]

Large-scale instabilities occurring in the presence of small-scale turbulent fluctuations are frequently observed in geophysical or astrophysical contexts but are difficult to reproduce in the laboratory. Using extensive numerical simulations, we report here on intense recurrent bursts of turbulence in plane Poiseuille flow rotating about a spanwise axis. A simple model based on the linear instability of the mean flow can predict the structure and time scale of the nearly periodic and self-sustained burst cycles. Poiseuille flow is suggested as a prototype for future studies of low-dimensional dynamics embedded in strongly turbulent environments.

Place, publisher, year, edition, pages
2014. Vol. 112, no 14, 144502- p.
Keyword [en]
Episodic Accretion, Magnetic-Field, Star-Formation, Channel Flow, Dynamo, Simulations, Instability
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Identifiers
URN: urn:nbn:se:kth:diva-148267DOI: 10.1103/PhysRevLett.112.144502ISI: 000338038900012Scopus ID: 2-s2.0-84898405410OAI: oai:DiVA.org:kth-148267DiVA: diva2:736093
Funder
Swedish Research Council, 621-2010-4147 621-2013-5784Swedish e‐Science Research Center
Note

QC 20140805

Available from: 2014-08-05 Created: 2014-08-04 Last updated: 2017-12-05Bibliographically approved

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Brethouwer, GeertSchlatter, PhilippHenningson, Dan S.Johansson, Arne V.

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TurbulenceLinné Flow Center, FLOWSeRC - Swedish e-Science Research CentreMechanicsStability, Transition and Control
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