Flow Over a Vertical Sill in an Open Channel

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Abstract
An investigation of a particular case of flow over a vertical sill is reported. This flow consists of a definite nonuniform reach between two flow sections, the entrance section upstream of the sill at which a supercritical flow exists and the surface roller of a forced hydraulic jump begins, and the exit section downstream of the sill at which uniform subcritical flow is reached. The flow is described by five dimensionless variables, the Froude number, and four similarity criteria for flow geometry. The relationships among the variables are given by graphs based on experimental data. The boundary values and the similarity concepts for the flow have been defined. The results are applicable to the design of hydraulic jump stilling basins.

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