Interpretation of PIV autocorrelation mesurements in complex particle-laden flows

S. L. Anderson, Ellen K Longmire

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Particle image velocimetry (PIV) was used to measure instantaneous and average particle velocity fields near the stagnation zone of a particle-laden impinging air jet. The results were compared with Lagrangian particle tracking measurements. Ensemble averages from the two methods agree well except in regions where particles have different histories, and a specific trajectory is dominant but not exclusive. The PIV autocorrelation method loses information regarding non-dominant particle trajectories. Thus, although instantaneous PIV measurements yield the dominant particle velocities correctly, the averaged measurements are biased in some regions.

Original languageEnglish (US)
Pages (from-to)314-317
Number of pages4
JournalExperiments in Fluids
Issue number4
StatePublished - Feb 1996


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