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Hysteresis, non-linearity and instabilities on circular crested weir
2022Waters flowing over rounded weirs experience a rapidly accelerated flow region near the crest. The head-discharge relationship of a half-round crested weir was tested physically over two orders of magnitudes. With increasing discharge, the nappe was initially attached to the weir's downstream wall, until some nappe detachment occurred.
Chanson, Hubert, Memory, Oscar
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XVI.—On the Discharge of Water from Circular Weirs and Orifices
Proceedings of the Royal Society of Edinburgh, 1909SummaryThe discharge of water through a vertical circular orifice is represented by an expression which does not admit of a direct mathematical solution, but from which results have been obtained by graphical means. The shape of the curve of actual discharge is similar to that found for the theoretical discharge; both curves are sensibly straight lines
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Discussion of “Flow Through Circular Weirs”
Journal of the Hydraulics Division, 1958Madhav Manohar +4 more
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The Discharge over Circular Weirs
Journal of the Society of Mechanical Engineers, 1933openaire +1 more source
Closure to “Flow Through Circular Weirs”
Journal of the Hydraulics Division, 1959openaire +1 more source
Reducing nappe instabilities at circular weirs using splitters [PDF]
Water overflowing a rounded weir experiences a rapidly accelerating fluid flow region near the crest. Depending upon the discharge and radius of curvature, the overflow nappe may be attached or detached. A few recent studies reported the existence of hydrodynamic hysteresis and flow instabilities, in absence of nappe ventilation, leading to a number of
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Discharge and flow field of the circular channel along the side weir
Canadian Journal of Civil Engineering, 2015Hamed Azimi
exaly