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Stripy patterns in low-Re turbulent 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. KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0001-9627-5903
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control.ORCID iD: 0000-0001-7864-3071
2010 (English)In: SEVENTH IUTAM SYMPOSIUM ON LAMINAR-TURBULENT TRANSITION / [ed] Schlatter P; Henningson DS, 2010, Vol. 18, 159-164 p.Conference paper, Published paper (Refereed)
Abstract [en]

We present for the first time a complete bifurcation diagram of plane Couette flow based on direct numerical simulation of the full Navier-Stokes equations. The use of an unusually large computational domain (800h x 2h x 356h) is crucial for the determination of transition thresholds, because it allows to reproduce spatio-temporal intermittency structures such as transient spots, turbulent bands, and laminar holes. The threshold in Re (based on the half-gap) is found to he Re-c = 324 +/- 1 in very good agreement with available experimental data. This work points out that, at the onset of transition in Re, fragmented oblique patterns always emerge from the interaction of growing neighbouring spots. An analogy with thermodynamical phase transition seems relevant to describe the whole transition process.

Place, publisher, year, edition, pages
2010. Vol. 18, 159-164 p.
Series
IUTAM Bookseries, 18
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-29869DOI: 10.1007/978-90-481-3723-7_24ISI: 000277097200024Scopus ID: 2-s2.0-84862275276ISBN: 978-90-481-3722-0 (print)OAI: oai:DiVA.org:kth-29869DiVA: diva2:399184
Conference
7th IUTAM Symposium on Laminar-Turbulent Transition, Royal Inst Technol, Stockholm, SWEDEN, JUN 23-26, 2009
Note
QC 20110221Available from: 2011-02-21 Created: 2011-02-17 Last updated: 2011-02-21Bibliographically approved

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Schlatter, PhilippHenningson, Dan S.

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