COHERENT STRUCTURE IN CONTINOUS OVERBANK MEANDERING CHANNEL FLOW BY USING PIV MEASUREMENTS

Abstract

It is very important to reveal the coherent structure in meandering compound open-channel flows for predicting the transport properties of suspended sediments in rivers in flood. However, flow-visualization techniques such as PIV and PTV, have not sufficiently been applied to such flows in previous studies, and thus, there is almost no detailed information on coherent turbulence in meandering compound open-channel flows. Therefore, in this study, we conducted some PIV measurements with high-speed CMOS camera. As the results, the time-averaged velocity properties and coherent turbulence structure were investigated and discussed.