Measurement of high-Re turbulent pipe flow using single-pixel PIV

Review (2023)

Authors

G. Oldenziel Fluid Mechanics - Mechanical, Maritime and Materials Engineering , Deltares
S. Sridharan Deltares, Multi Phase Systems - Mechanical, Maritime and Materials Engineering
J. Westerweel Fluid Mechanics - Mechanical, Maritime and Materials Engineering
Research Group
Fluid Mechanics (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2023 G. Oldenziel, S. Sridharan, J. Westerweel
DOI
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https://doi.org/10.1007/s00348-023-03701-z
More Info
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Published Date

2023

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Fluid Mechanics

Abstract

In this paper are presented PIV measurements of turbulent pipe flow at bulk Reynolds numbers Re D between 3.4 × 10 5 and 6.9 × 10 5 . So-called single-pixel correlation is applied that yields a superior spatial resolution that is slightly larger than the equivalent size of a pixel in the flow. The location and shape of the averaged correlation peak give the mean velocity and normal and Reynolds stresses. A novel aspect of the single-pixel correlation approach is the extension to determine the 2-point spatial correlation of the velocity fluctuations and the spectrum of the longitudinal velocity fluctuations. Detailed results are presented for Re D = 4.98 × 10 5 , corresponding to a shear Reynolds number Re τ = 10.3 × 10 3 , with a spatial resolution in wall units of Δy+ = 19.