The pressure-velocity correlation in oscillatory turbulent flow between a pair of bluff bodies

Shinnosuke Obi, Norihiko Tokai

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Turbulent flow measurements were conducted between two bluff bodies set in uniform flow in tandem arrangement. The velocity field obtained with PIV was averaged with respect to either time or phase of periodic pressure oscillation induced by vortex shedding from the bluff body, i.e., Reynolds decomposition or three-level decomposition. The Reynolds stresses caused by periodic fluid motion was found excessively large compared with those related to turbulent fluctuations in the entire flow field in observation. The PIV data were used to solve the discrete Poisson equation of instantaneous pressure. The effect of organized vortex motion caused strong correlations between velocity and pressure gradient when observed from the framework of the Reynolds averaging.

Original languageEnglish
Pages (from-to)768-776
Number of pages9
JournalInternational Journal of Heat and Fluid Flow
Volume27
Issue number5
DOIs
Publication statusPublished - 2006 Oct 1

Keywords

  • PIV
  • Pressure-velocity correlation
  • Reynolds stress
  • Three-level decomposition
  • Turbulent wake
  • URANS

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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