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A new formulation for the streamwise turbulence intensity distribution
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1663-3553
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-8667-0520
2011 (English)In: 13th European Turbulence Conference (ETC13): Wall-Bounded Flows And Control Of Turbulence, Institute of Physics Publishing (IOPP), 2011, 022002- p.Conference paper, Published paper (Refereed)
Abstract [en]

Numerical and experimental data from zero pressure-gradient turbulent boundary layers over smooth walls have been analyzed by means of the so called diagnostic plot introduced by Alfredsson & Orlu [Eur. J. Fluid Mech. B/Fluids, 4 2, 403 (2010)]. In the diagnostic plot the local turbulence intensity is shown as a function of the local mean velocity normalized with a reference velocity scale. In the outer region of the boundary layer a universal linear decay of the turbulence intensity is observed independent of Reynolds number. The deviation from this linear region appears in the buffer region and seems to be universal when normalized with the friction velocity. Therefore, a new empirical fit for the streamwise velocity turbulence intensity distribution is proposed and the results are compared with up to date reliable high-Reynolds number experiments and extrapolated towards Reynolds numbers relevant to atmospherical boundary layers.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2011. 022002- p.
Series
Journal of Physics: Conference Series (Print), ISSN 1742-6588 ; 318
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-83126DOI: 10.1088/1742-6596/318/2/022002ISI: 000301292300002Scopus ID: 2-s2.0-84856329950OAI: oai:DiVA.org:kth-83126DiVA: diva2:498724
Conference
13th European Turbulence Conference (ETC) Location: Univ Warsaw, Warsaw, Poland, Date: SEP 12-15, 2011
Note
QC 20120410Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2012-04-10Bibliographically approved

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Alfredsson, P. HenrikÖrlü, RamisSegalini, Antonio

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