2021 Volume 77 Issue 2 Pages I_943-I_948
When a supercritical flow comes into a bend accompanied with a oblique hydraulic jump, the flow becomes 2D. Ippen’s theory well describes such flows, and we showed that the CRD numerical scheme well reproduce such flows. If both banks have such bend with contraction of the flume, and the two jumps cross each other, the flow becomes more complicated. 2D CRD schemes is applied to the analyses of such flows.
The present paper investigated the development of a hydraulic bore in such a flow by use of 1D and 2D CRD schemes. The superposition of the two jumps causes a rise of the water level, and makes the Froude number F lower, and when Fr<1, it becomes a specie of a jump. If it extends over the whole width of the flume, it becomes a bore advancing upstream. In addition, the jump water and the wave are affected by the refractive angle. The larger the refractive angle, the stronger the two-dimensional effect.
PROCEEDINGS OF HYDRAULIC ENGINEERING
