Abstract
Flow in distribution channels (locally decreasing discharge) is investigated for steady flow conditions by accounting for the effects of slope and curvature of the streamlines. A qualitative analysis indicates that the surface profile is either of the undulatory character for subcritical flow state, or smooth for supercritical flow state. When compared to the approach assuming hydrostatic pressure and uniform velocity distributions, the first deviate from each other throughout, while the second reveal only local deviations. A quantitative insight into the flow processes is given by the numerically integrated model equations, and it is found that the present model allows for an accurate prediction of all pertinent flow parameters.
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