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Localized edge states in plane Couette flow
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-9627-5903
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-7864-3071
2009 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 21, no 11Article in journal (Refereed) Published
Abstract [en]

The dynamics at the threshold of transition in plane Couette flow is Investigated numerically in a large spatial domain for a certain type of localized initial perturbation, for Re between 350 and 1000 The corresponding edge state is all unsteady spotlike Structure, localized in both streamwise and spanwise directions, which neither grows nor decays in size. We show that the localized nature of the edge state is numerically robust. and IS not Influenced by the size of the computational domain The edge trajectory appeals to transiently visit localized steady states This suggests that basic spatiotemporally intermittent features of transition to turbulence. such as the growth Of it turbulent spot, call be described as a dynamical system.

Place, publisher, year, edition, pages
2009. Vol. 21, no 11
Keyword [en]
exact coherent structures, pipe-flow, traveling-waves, turbulent spots, wall turbulence, shear flows, transition, dynamics
Identifiers
URN: urn:nbn:se:kth:diva-19062DOI: 10.1063/1.3265962ISI: 000272931900001Scopus ID: 2-s2.0-76249098297OAI: oai:DiVA.org:kth-19062DiVA: diva2:337109
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2010-12-20Bibliographically approved

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Schlatter, PhilippHenningson, Dan S.

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