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Journal of Applied Mechanics and Technical Physics

2002 year, number 2

Cavities behind a spillway with a wide sill

V. I. Bukreev and A. V. Gusev
Lavrent'ev Institute of Hydrodynamics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090
Pages: 280-285

Abstract

The paper reports experimental results
on flow regimes with and without
cavities behind a rectangular sill in an
open channel. Photographs illustrating
the shapes of the free ends of the
cavities are given. It is shown that the
domains of existence of various flow
regimes overlap in the phase space of
problem parameters, which leads to
nonuniqueness of various functions of
the parameters. Quantitative information
is obtained for free surface profiles,
the discharge coefficient, and the
pressure on the flow bottom.