Abstract
A fast quantitative processing of particle image velocimetry photographs by a whole-field spatial filtering technique is described. Photographs are observed through a conventional filtering setup. This produces fringe patterned images with each fringe corresponding to a fixed value of one velocity component. These images are acquired with a CCD camera and digitally processed to retrieve the fringe centerline positions. The interpolation of these data provides the velocity value on a grid of regularly spaced points.
Photographs taken from a Rayleigh-Bénard convective flow have been processed with this technique and with a previously reported point-by-point technique. Results from both techniques compare well.
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This work was supported by Diputación General de Aragón under Grant No. PCB6-90
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Palero, V., Andrés, N., Arroyo, M.P. et al. Fast quantitative processing of particle image velocimetry photographs by a whole-field filtering technique. Experiments in Fluids 19, 417–425 (1995). https://doi.org/10.1007/BF00190259
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DOI: https://doi.org/10.1007/BF00190259