Computation of transcritical steady flow over a curved bed with lateral contraction

The St. Venant equations are adequate in simulating the free-surface flow over lightly curved beds, but are insufficient when applied to some moderately to highly curved flows caused by bed sills and lateral contractions. Many other studies have only considered effects of the changes in the channel...

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Main Authors: Cheng, Nian-Sheng, Law, Adrian Wing-Keung, Lo, Edmond Yat-Man
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2012
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Online Access:https://hdl.handle.net/10356/101686
http://hdl.handle.net/10220/7675
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1016862020-03-07T11:45:54Z Computation of transcritical steady flow over a curved bed with lateral contraction Cheng, Nian-Sheng Law, Adrian Wing-Keung Lo, Edmond Yat-Man School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Water resources The St. Venant equations are adequate in simulating the free-surface flow over lightly curved beds, but are insufficient when applied to some moderately to highly curved flows caused by bed sills and lateral contractions. Many other studies have only considered effects of the changes in the channel bottom elevation. In comparison, the effect of the lateral contraction combined with the bottom change has not been thoroughly investigated. In this study, with the consideration of the pressure modification induced by the flow curvature, a one-dimensional equation is derived to compute the water surface profile for transcritical flows. The situation investigated is limited to the case of flows with a moderately curved bed combined with lateral contraction. The computational results show that the predicted flow profiles compare well with experimental data. 2012-03-26T03:28:38Z 2019-12-06T20:42:45Z 2012-03-26T03:28:38Z 2019-12-06T20:42:45Z 2003 2003 Journal Article Cheng N. S., Law, A. W. K. and Lo, E. Y. M. (2003). Transcritical flow over a moderately curved bed with lateral contraction. Journal of Hydraulic Research, 41(6), 631-637. 0022-1686 https://hdl.handle.net/10356/101686 http://hdl.handle.net/10220/7675 10.1080/00221680309506895 en Journal of hydraulic research © 2003 IAHR. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of hydraulic research, International Association for Hydro-Environment Engineering and Research. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1080/00221680309506895]. 20 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Water resources
spellingShingle DRNTU::Engineering::Civil engineering::Water resources
Cheng, Nian-Sheng
Law, Adrian Wing-Keung
Lo, Edmond Yat-Man
Computation of transcritical steady flow over a curved bed with lateral contraction
description The St. Venant equations are adequate in simulating the free-surface flow over lightly curved beds, but are insufficient when applied to some moderately to highly curved flows caused by bed sills and lateral contractions. Many other studies have only considered effects of the changes in the channel bottom elevation. In comparison, the effect of the lateral contraction combined with the bottom change has not been thoroughly investigated. In this study, with the consideration of the pressure modification induced by the flow curvature, a one-dimensional equation is derived to compute the water surface profile for transcritical flows. The situation investigated is limited to the case of flows with a moderately curved bed combined with lateral contraction. The computational results show that the predicted flow profiles compare well with experimental data.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Cheng, Nian-Sheng
Law, Adrian Wing-Keung
Lo, Edmond Yat-Man
format Article
author Cheng, Nian-Sheng
Law, Adrian Wing-Keung
Lo, Edmond Yat-Man
author_sort Cheng, Nian-Sheng
title Computation of transcritical steady flow over a curved bed with lateral contraction
title_short Computation of transcritical steady flow over a curved bed with lateral contraction
title_full Computation of transcritical steady flow over a curved bed with lateral contraction
title_fullStr Computation of transcritical steady flow over a curved bed with lateral contraction
title_full_unstemmed Computation of transcritical steady flow over a curved bed with lateral contraction
title_sort computation of transcritical steady flow over a curved bed with lateral contraction
publishDate 2012
url https://hdl.handle.net/10356/101686
http://hdl.handle.net/10220/7675
_version_ 1681041107076513792