Contribution of Reynolds stress distribution to the skin friction in wall-bounded flows

Koji Fukagata, Kaoru Iwamoto, Nobuhide Kasagi

Research output: Contribution to journalArticlepeer-review

359 Citations (Scopus)

Abstract

A simple expression is derived of the componential contributions that different dynamical effects make to the frictional drag in turbulent channel, pipe and plane boundary layer flows. The local skin friction can be decomposed into four parts, i.e., laminar, turbulent, inhomogeneous and transient components, the second of which is a weighted integral of the Reynolds stress distribution. It is reconfirmed that the near-wall Reynolds stress is primarily important for the prediction and control of wall turbulence. As an example, the derived expression is used for an analysis of the drag modification by the opposition control and by the uniform wall blowing/suction.

Original languageEnglish
Pages (from-to)L73-L76
JournalPhysics of Fluids
Volume14
Issue number11
DOIs
Publication statusPublished - 2002 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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