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Potential flow solution for open-channel flows and weir-crest overflow

AuthorsCastro-Orgaz, Óscar
Steady flow
Open-channel flow
Hydraulic modeling
Discharge measurement
Issue Date14-Jun-2013
PublisherAmerican Society of Civil Engineers
CitationJournal of Irrigation and Drainage Engineering 139(7): 551-559 (2013)
AbstractWeirs used for water discharge measurement in open-channel systems normally operate under free-flow conditions, for which the specific energy reaches a minimum at the weir crest. This type of transitional open-channel flow can be simulated using the ideal fluid flow theory. The traditional application of that theory requires the computation of the flow net over the weir. In this work, a potential flow model using a semi-inverse mapping is proposed in order to simulate potential flow over weirs. The model reduces the computation of the entire flow net to the determination of the streamlineflow pattern only. The computations are conducted numerically using a simple finite-difference technique, in which conservation of energy, momentum, and the critical flow condition with curvilinear streamlines is considered. The model is used to display parameters of engineering interest at the point of minimum specific energy. © 2013 American Society of Civil Engineers.
Identifiersdoi: 10.1061/(ASCE)IR.1943-4774.0000580
issn: 0733-9437
e-issn: 1943-4774
Appears in Collections:(IAS) Artículos
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