Measurement volume defined by peak-finding algorithms in cross-correlation particle image velocimetry
- 18 January 2001
- journal article
- design note
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 12 (2) , N14-N16
- https://doi.org/10.1088/0957-0233/12/2/402
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.Keywords
This publication has 1 reference indexed in Scilit:
- Theory of cross-correlation analysis of PIV imagesFlow, Turbulence and Combustion, 1992