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 | |
| Publication status | Published - 2006 Oct |
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Keywords
- PIV
- Pressure-velocity correlation
- Reynolds stress
- Three-level decomposition
- Turbulent wake
- URANS
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Mechanical Engineering
Cite this
The pressure-velocity correlation in oscillatory turbulent flow between a pair of bluff bodies. / Obi, Shinnosuke; Tokai, Norihiko.
In: International Journal of Heat and Fluid Flow, Vol. 27, No. 5, 10.2006, p. 768-776.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The pressure-velocity correlation in oscillatory turbulent flow between a pair of bluff bodies
AU - Obi, Shinnosuke
AU - Tokai, Norihiko
PY - 2006/10
Y1 - 2006/10
N2 - 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.
AB - 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.
KW - PIV
KW - Pressure-velocity correlation
KW - Reynolds stress
KW - Three-level decomposition
KW - Turbulent wake
KW - URANS
UR - http://www.scopus.com/inward/record.url?scp=33748763642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748763642&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatfluidflow.2006.03.021
DO - 10.1016/j.ijheatfluidflow.2006.03.021
M3 - Article
VL - 27
SP - 768
EP - 776
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
SN - 0142-727X
IS - 5
ER -