Potential flow solution for open-channel flows and weir-crest overflow
Weirs 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.
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Format: | artículo biblioteca |
Language: | English |
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American Society of Civil Engineers
2013-06-14
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Subjects: | Weir, Steady flow, Open-channel flow, Hydraulic modeling, Discharge measurement, |
Online Access: | http://hdl.handle.net/10261/90534 |
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dig-ias-es-10261-905342016-02-17T22:48:10Z Potential flow solution for open-channel flows and weir-crest overflow Castro-Orgaz, Óscar Weir Steady flow Open-channel flow Hydraulic modeling Discharge measurement Weirs 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. Peer Reviewed 2014-02-06T14:02:52Z 2014-02-06T14:02:52Z 2013-06-14 2014-02-06T14:02:52Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1061/(ASCE)IR.1943-4774.0000580 issn: 0733-9437 e-issn: 1943-4774 Journal of Irrigation and Drainage Engineering 139(7): 551-559 (2013) http://hdl.handle.net/10261/90534 10.1061/(ASCE)IR.1943-4774.0000580 en none American Society of Civil Engineers |
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Weir Steady flow Open-channel flow Hydraulic modeling Discharge measurement Weir Steady flow Open-channel flow Hydraulic modeling Discharge measurement Castro-Orgaz, Óscar Potential flow solution for open-channel flows and weir-crest overflow |
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Weirs 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. |
format |
artículo |
topic_facet |
Weir Steady flow Open-channel flow Hydraulic modeling Discharge measurement |
author |
Castro-Orgaz, Óscar |
author_facet |
Castro-Orgaz, Óscar |
author_sort |
Castro-Orgaz, Óscar |
title |
Potential flow solution for open-channel flows and weir-crest overflow |
title_short |
Potential flow solution for open-channel flows and weir-crest overflow |
title_full |
Potential flow solution for open-channel flows and weir-crest overflow |
title_fullStr |
Potential flow solution for open-channel flows and weir-crest overflow |
title_full_unstemmed |
Potential flow solution for open-channel flows and weir-crest overflow |
title_sort |
potential flow solution for open-channel flows and weir-crest overflow |
publisher |
American Society of Civil Engineers |
publishDate |
2013-06-14 |
url |
http://hdl.handle.net/10261/90534 |
work_keys_str_mv |
AT castroorgazoscar potentialflowsolutionforopenchannelflowsandweircrestoverflow |
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