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A new scaling for the streamwise turbulence intensity in wall-bounded turbulent flows and what it tells us about the "outer" peak
KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Skolan för teknikvetenskap (SCI), Mekanik.ORCID-id: 0000-0002-1146-3241
KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Skolan för teknikvetenskap (SCI), Mekanik.ORCID-id: 0000-0001-8667-0520
KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Skolan för teknikvetenskap (SCI), Mekanik.ORCID-id: 0000-0002-1663-3553
2011 (engelsk)Inngår i: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 23, nr 4, s. 041702-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

One recent focus of experimental studies of turbulence in high Reynolds number wall-bounded flows has been the scaling of the root mean square of the fluctuating streamwise velocity, but progress has largely been impaired by spatial resolution effects of hot-wire sensors. For the near-wall peak, recent results seem to have clarified the controversy; however, one of the remaining issues in this respect is the emergence of a second (so-called outer) peak at high Reynolds numbers. The present letter introduces a new scaling of the local turbulence intensity profile, based on the diagnostic plot by Alfredsson and Orlu [Eur. J. Mech. B/Fluids 42, 403 (2010)], which predicts the location and amplitude of the "outer" peak and suggests its presence as a question of sufficiently large scale separation.

sted, utgiver, år, opplag, sider
2011. Vol. 23, nr 4, s. 041702-
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URN: urn:nbn:se:kth:diva-33696DOI: 10.1063/1.3581074ISI: 000290050000003Scopus ID: 2-s2.0-79955435584OAI: oai:DiVA.org:kth-33696DiVA, id: diva2:418580
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20110523Tilgjengelig fra: 2011-05-23 Laget: 2011-05-16 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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Alfredsson, P. HenrikSegalini, AntonioÖrlü, Ramis

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