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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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 |
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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 |
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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. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Cheng, Nian-Sheng Law, Adrian Wing-Keung Lo, Edmond Yat-Man |
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Article |
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Cheng, Nian-Sheng Law, Adrian Wing-Keung Lo, Edmond Yat-Man |
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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 |
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1681041107076513792 |