Similarity of length scales in high-Reynolds-number wall-bounded flows

Nikolay Gustenyov, Margit Egerer, Marcus Hultmark, Alexander Smits, Sean C.C. Bailey

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1 Scopus citations


The wall dependence of length scales used to describe large- and small-scale structures of turbulence is examined using highly resolved experiments in zero-pressure-gradient turbulent boundary layers and pipe flows spanning the range 2000 < Reτ. Of particular interest is the influence of external intermittency on the scaling of these length scales. It is found that when suitable scaling parameters are selected and external intermittency is accounted for, the dissipative motions follow inner scaling even into the outer-scaled regions of the flow, and that certain large-scale descriptions follow outer scaling even in the inner-scaled regions of the flow. The wall dependence is the same for both internal pipe and external boundary layer flows, and the different length scales can be related to recognizable features in the longitudinal wavenumber spectrum.

Original languageEnglish (US)
Article numberA17
JournalJournal of Fluid Mechanics
StatePublished - Jun 16 2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics


  • intermittency
  • pipe flow
  • turbulent boundary layers


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