抄録
Open-channel flow with a side cavity is investigated with the aid of a high-vision video camera having 1440 by 1080 pixel resolution. The experiments are performed by fixing the aspect ratio of the side cavity at one to five and by changing the Froude number of the incoming flow. At the same time, longitudinal side slope with several angles are installed within the side cavity to simulate the actual river situation and its effect on the surface flow is examined in detail. It is made clear that the introduction of a new video camera improves the measurement accuracy of instantaneous velocity fields with a smaller template size in PIV. Installation of a side slope is found to have large effects on the recirculating flow pattern at the surface.
