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Comment on the scaling of the near-wall streamwise variance peak in turbulent pipe flows
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: 0000-0002-1146-3241
2013 (English)In: Experiments in Fluids, ISSN 0723-4864, E-ISSN 1432-1114, Vol. 54, no 1, 1431- p.Article in journal (Refereed) Published
Abstract [en]

Apparent contradictory results regarding the Reynolds number (Re) scaling of the near-wall peak of the streamwise velocity variance distribution in turbulent pipe flows (Ng et al. Exp Fluids 51, 1261 and Vallikivi et al. Exp. Fluids 51, 1521) are discussed. Conclusions from the Princeton University/ONR Superpipe published between 2010 and 2012 are examined, doubts are raised, and recent numerical and experimental results are supplemented. The compiled results support the view that the inner-scaled peak amplitude increases with Re (at least to a Kármán number (R+) of 3,000) in contrast to the view put forward by several publications based on results from the Superpipe. Consequently, there is a need for further experimental results for R+ > 3,000 to ascertain the trend at higher Re.

Place, publisher, year, edition, pages
2013. Vol. 54, no 1, 1431- p.
Keyword [en]
Near-wall, Peak amplitude, Princeton University, Streamwise velocity, Turbulent pipe flow, Pipe flow, Reynolds number, Turbulent flow
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-120947DOI: 10.1007/s00348-012-1431-0ISI: 000318153700014Scopus ID: 2-s2.0-84871553033OAI: oai:DiVA.org:kth-120947DiVA: diva2:616419
Note

QC 20130416

Available from: 2013-04-16 Created: 2013-04-16 Last updated: 2017-12-06Bibliographically approved

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Örlü, RamisAlfredsson, P. Henrik

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