C. Stevens et M. Coates, APPLICATIONS OF A MAXIMIZED CROSS-CORRELATION TECHNIQUE FOR RESOLVINGVELOCITY-FIELDS IN LABORATORY EXPERIMENTS, Journal of Hydraulic Research, 32(2), 1994, pp. 195-212
In this study a maximised cross-correlation technique is applied to tw
o very different experiments. The first is a laminar, slowly developin
g experiment where the main scales of the motion are comparable to the
image size. Here extensive use of multiple passes with the technique
and various filters are applied to replace erroneous measurements. The
second experiment has both laminar and turbulent regions of now, and
in addition, many of the scales of motion are smaller than the correla
tion window size. Mean velocities are resolved in this application, as
well as a qualitative impression of the turbulent fluctuations. The r
esults from the experiments are discussed, along with the parameters a
vailable and how they affect the efficiency of the process. In additio
n pre- and post-processing options for the technique are examined. The
technique proves a viable method that provides good results while usi
ng commonly available hardware.