A new formulation for the streamwise turbulence intensity distribution
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 (Refereed)
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.
, Journal of Physics: Conference Series (Print), ISSN 1742-6588 ; 318
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-83126DOI: 10.1088/1742-6596/318/2/022002ISI: 000301292300002ScopusID: 2-s2.0-84856329950OAI: oai:DiVA.org:kth-83126DiVA: diva2:498724
13th European Turbulence Conference (ETC) Location: Univ Warsaw, Warsaw, Poland, Date: SEP 12-15, 2011
QC 201204102012-02-122012-02-122012-04-10Bibliographically approved