Measurement volume defined by peak-finding algorithms in cross-correlation particle image velocimetry

Michael G. Olsen, Ronald J. Adrian

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

This note presents an analytical model that relates the displacement found by peak finding in cross-correlation particle image velocimetry using light-sheet illumination to the weighted volume average of the fluid velocity field. General equations are derived describing the cross-correlation function in light-sheet PIV. An approximate model is derived for light-sheet illumination by approximating the particle images as Gaussian. This results in a weighting function that can be used to define the measurement volume and to find biasing of the velocity measured for this volume.

Original languageEnglish (US)
Pages (from-to)N14-N16
JournalMeasurement Science and Technology
Volume12
Issue number2
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

Keywords

  • Cross-correlation analysis
  • Particle image velocimetry
  • Peak finding

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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