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

Author

Listed:
  • Sha Yang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Bo Wang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Yakun Guo

    (Faculty of Engineering & Informatics, University of Bradford, Bradford BD71DP, UK)

  • Jianmin Zhang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Yunliang Chen

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

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.

Suggested Citation

  • Sha Yang & Bo Wang & Yakun Guo & Jianmin Zhang & Yunliang Chen, 2020. "Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels," Energies, MDPI, vol. 13(23), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6280-:d:452957
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    References listed on IDEAS

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    1. Silvia Bosa & Marco Petti, 2013. "A Numerical Model of the Wave that Overtopped the Vajont Dam in 1963," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(6), pages 1763-1779, April.
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