The structure of large- and very large-scale motions in turbulent pipe flow

Sean C.C. Bailey, Alexander J. Smits

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


Multi-point velocity measurements have been performed in turbulent pipe flow at ReD = 1.5 × 105 and combined with cross-spectral and Proper Orthogonal Decomposition analysis to elucidate information on the structure of the large- and very-large scale motions in the outer layer of wall-bounded flows. The results indicate that in the outer layer the largescale motions may be composed of detached eddies with a wide range of azimuthal scales whereas in the logarithmic layer they are attached. The very-large-scale motions have large radial scales, are concentrated around a single azimuthal mode, and make a smaller angle with the wall compared to the large-scale motions. The results support a hypothesis that only the detached large-scale motions in the outer layer align to form the very-large-scale motions.

Original languageEnglish
Title of host publication39th AIAA Fluid Dynamics Conference
StatePublished - 2009

Publication series

Name39th AIAA Fluid Dynamics Conference

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Aerospace Engineering


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