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

Shinnosuke Obi; Norihiko Tokai

doi:10.1016/j.ijheatfluidflow.2006.03.021

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

Shinnosuke Obi, Norihiko Tokai

Vice-President

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	768-776
Number of pages	9
Journal	International Journal of Heat and Fluid Flow
Volume	27
Issue number	5
DOIs	https://doi.org/10.1016/j.ijheatfluidflow.2006.03.021
Publication status	Published - 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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10.1016/j.ijheatfluidflow.2006.03.021

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KW - Turbulent wake

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