Research on the characteristic of collapsed water flow in a rectangular column
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Abstract:
To some extent, the flow of dam break in the reservoir can be generalized to collapsed water flow in rectangular column. A mathematical model for dam-break flow under the action of gravity in a rectangular water column has been set up to study the flow characteristics in dam site，moreover，a discharge formula in dam site during the process of dam-break was obtained by dimensional analysis method and the discharge change process in dam site was also analyzed by comparing the different ratio of depth to width. The results showed that the rule of discharge change process in dam site is uniform at the same ratio of depth to width; the peak discharge decreases and the occurring time delay as the ratio of depth to width increases at the different ratio of depth to width, then the discharge formula of peak discharge and occurring time based on the ratio of depth to width is derived and the relationship among peak discharge coefficient, occurring time coefficient in the formula and the ratio of depth to width is also analyzed. The results can provide references for the research of dam-break.
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