A STUDY ON PTV APPLICATION FOR EXPERIMENTS IN ACTUAL RIVER MODEL

A Particle Tracking Velocimetry is applied to surface and internal flow measurements in an actual river model. New techniques are proposed for the flow measurements. In the measurements of surface flows, two CCD video cameras, which are exactly synchronized, are used in order to measure detailed flow vectors in a wide area. In this experiment, one CCD camera captures wider area for understanding global flow patterns. The other camera focuses on local area where flow geometry is complicated. In addition to the surface flow measurement techniques, an internal flow measurement technique is also proposed by using a bore lens system. The proposed techniques are applied to an experiment, in which an actual river model is used. The results show reasonable velocity distributions compared with the results of standard point measurements.