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Gate-opening criterion for generating dam-break flow in non-rectangular wet bed channels
Yang, S. Wang, B. Guo, Yakun Zhang, J. Chen, Y.
Yang, S.
Wang, B.
Guo, Yakun
Zhang, J.
Chen, Y.
Publication Date
2020-11
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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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openAccess
Accepted for publication
2020-11-25
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Abstract
A sudden dam failure is usually simulated by the rapid removal of a gate in laboratory tests and numerical simulations. The gate-opening time is often determined according to the Lauber and Hager instantaneous collapse criterion (referred to as Lauber-Hager criterion) established for a rectangular open channel with a dry bed. However, this criterion is not suitable for non-rectangular channels or initial wet-bed conditions. In this study, the effect of the gate-opening time on the wave evolution is investigated by using the large eddy simulation (LES) model. The instantaneous dam break, namely the dam break without a gate, is simulated for comparison. A gate-opening criterion for generating dam-break flow in non-rectangular wet bed channel is proposed in this study, which can be used as an extension of the Lauber-Hager criterion and provides a more comprehensive and reasonable estimate of the gate opening time.
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Citation
Yang S, Wang B, Guo Y et al (2020) Gate-opening criterion for generating dam-break flow in non-rectangular wet bed channels. Energies. 13(23): 6280.
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Article