A new scaling for the streamwise turbulence intensity in wall-bounded turbulent flows and what it tells us about the "outer" peak
2011 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 23, no 4, 041702- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2011. Vol. 23, no 4, 041702- p.
IdentifiersURN: urn:nbn:se:kth:diva-33696DOI: 10.1063/1.3581074ISI: 000290050000003ScopusID: 2-s2.0-79955435584OAI: oai:DiVA.org:kth-33696DiVA: diva2:418580
FunderSwedish Research Council
QC 201105232011-05-232011-05-162011-05-23Bibliographically approved