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On the fluctuating wall-shear stress in zero pressure-gradient turbulent boundary layer 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: 0000-0001-9627-5903
2011 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 23, no 2, 021704- p.Article in journal (Refereed) Published
Abstract [en]

Recent direct numerical simulation (DNS) results relating to the behavior of the fluctuating wall-shear stress tau(+)(w,rms) in turbulent boundary layer flows are discussed. This new compilation is motivated by a recent article [Wu and Moin, "Transitional and turbulent boundary layer with heat transfer," Phys. Fluids 22, 085105 (2010)], which indicates a need for clarification of the value of tau(+)(w,rms). It is, however, shown here, based on other recent DNS data, that most results, both in boundary layer and channel geometry, yield tau(+)(w,rms)approximate to 0.4 plus a small increase with Reynolds number coming from the growing influence of the outer spectral peak. The observed discrepancy in experimental data is mainly attributed to spatial resolution effects, as originally described by Alfredsson et al. [" The fluctuating wall-shear stress and the velocity field in the viscous sublayer, "Phys. Fluids 31, 1026 (1988)].

Place, publisher, year, edition, pages
2011. Vol. 23, no 2, 021704- p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-31602DOI: 10.1063/1.3555191ISI: 000287812800005Scopus ID: 2-s2.0-79952084150OAI: oai:DiVA.org:kth-31602DiVA: diva2:406295
Funder
Swedish Research CouncilSwedish e‐Science Research Center
Note
QC 20110325Available from: 2011-03-25 Created: 2011-03-21 Last updated: 2017-12-11Bibliographically approved

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Örlü, RamisSchlatter, Philipp

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