APPLICATIONS OF A MAXIMIZED CROSS-CORRELATION TECHNIQUE FOR RESOLVINGVELOCITY-FIELDS IN LABORATORY EXPERIMENTS

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.