Experimental investigation of the structure of large- and very-large-scale motions in turbulent pipe flow

Sean C.C. Bailey, Alexander J. Smits

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

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 large-scale motions (LSM) 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 (VLSM) have large radial scales, are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. The results support a hypothesis that only the detached LSM in the outer layer align to form the VLSM.

Original languageEnglish (US)
Pages (from-to)339-356
Number of pages18
JournalJournal of Fluid Mechanics
Volume651
DOIs
StatePublished - May 25 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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