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Volume 13
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Article

Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels

by
Sha Yang
1,
Bo Wang
1,*,
Yakun Guo
2,
Jianmin Zhang
1 and
Yunliang Chen
1
1
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
2
Faculty of Engineering & Informatics, University of Bradford, Bradford BD71DP, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(23), 6280; https://doi.org/10.3390/en13236280
Submission received: 23 September 2020 / Revised: 25 November 2020 / Accepted: 25 November 2020 / Published: 28 November 2020
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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 the Lauber–Hager criterion), which is 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, a dam-break without a gate, is simulated for comparison. A gate-opening criterion for generating dam-break flow in a 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.
Keywords: gate-opening time; criterion; dam-break wave; non-rectangular channel; wet-bed; LES gate-opening time; criterion; dam-break wave; non-rectangular channel; wet-bed; LES

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MDPI and ACS Style

Yang, S.; Wang, B.; Guo, Y.; Zhang, J.; Chen, Y. Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels. Energies 2020, 13, 6280. https://doi.org/10.3390/en13236280

AMA Style

Yang S, Wang B, Guo Y, Zhang J, Chen Y. Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels. Energies. 2020; 13(23):6280. https://doi.org/10.3390/en13236280

Chicago/Turabian Style

Yang, Sha, Bo Wang, Yakun Guo, Jianmin Zhang, and Yunliang Chen. 2020. "Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels" Energies 13, no. 23: 6280. https://doi.org/10.3390/en13236280

APA Style

Yang, S., Wang, B., Guo, Y., Zhang, J., & Chen, Y. (2020). Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels. Energies, 13(23), 6280. https://doi.org/10.3390/en13236280

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