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Turbulence stripe in transitional channel flow with/without system rotation
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
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2010 (English)In: 7th IUTAM Symposium on Laminar-Turbulent Transition: Proceedings of the seventh IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, Sweden, 2009, Springer Science+Business Media B.V., 2010, 421-426 p.Conference paper (Refereed)
Abstract [en]

We report direct numerical simulations and experiments conducted in two types of plane channel flows-plane Poiseuille flow and plane Couette flows without/ with system rotation-considering the subcritical-transition regime with using large aspect-ratio computational domains and channels. Both flows give rise to coexisting laminar and turbulent equilibrium regions in the form of oblique stripes, which are tilted by a certain angle with respect to the mean flow. When subjected to a stabilizing rotation, the Couette turbulence is locally quenched and exhibits the stripe pattern as similar to non-rotating cases. In this context, the turbulence stripe can be seen as an intrinsic phenomenon in the reverse transition in a channel flow.

Place, publisher, year, edition, pages
Springer Science+Business Media B.V., 2010. 421-426 p.
, IUTAM Bookseries, ISSN 1875-3507 ; 18
Keyword [en]
Computational domains, Couette, Mean flow, Plane channels, Plane Couette flow, Poiseuille flow, Stripe pattern, System rotation, Aspect ratio, Channel flow
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-150252DOI: 10.1007/978-90-481-3723-7-68ScopusID: 2-s2.0-84862291502ISBN: 978-904813722-0OAI: diva2:743109
7th IUTAM Symposium on Laminar-Turbulent Transition; Stockholm; Sweden; 23 June 2009 through 26 June 2009

QC 20140903

Available from: 2014-09-03 Created: 2014-09-01 Last updated: 2014-09-03Bibliographically approved

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Tillmark, NilsAlfredsson, P. Henrik
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