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

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...

Full description

Bibliographic Details
Main Authors:	Sha Yang, Bo Wang, Yakun Guo, Jianmin Zhang, Yunliang Chen
Format:	Article
Language:	English
Published:	MDPI AG 2020-11-01
Series:	Energies
Subjects:	gate-opening time criterion dam-break wave non-rectangular channel wet-bed LES
Online Access:	https://www.mdpi.com/1996-1073/13/23/6280

id	doaj-07d0c88e7b124793b724e754d50d822a
record_format	Article
spelling	doaj-07d0c88e7b124793b724e754d50d822a2020-11-29T00:03:41ZengMDPI AGEnergies1996-10732020-11-01136280628010.3390/en13236280Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed ChannelsSha Yang0Bo Wang1Yakun Guo2Jianmin Zhang3Yunliang Chen4State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaFaculty of Engineering & Informatics, University of Bradford, Bradford BD71DP, UKState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaA 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.https://www.mdpi.com/1996-1073/13/23/6280gate-opening timecriteriondam-break wavenon-rectangular channelwet-bedLES
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Sha Yang Bo Wang Yakun Guo Jianmin Zhang Yunliang Chen
spellingShingle	Sha Yang Bo Wang Yakun Guo Jianmin Zhang Yunliang Chen Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels Energies gate-opening time criterion dam-break wave non-rectangular channel wet-bed LES
author_facet	Sha Yang Bo Wang Yakun Guo Jianmin Zhang Yunliang Chen
author_sort	Sha Yang
title	Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels
title_short	Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels
title_full	Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels
title_fullStr	Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels
title_full_unstemmed	Gate-Opening Criterion for Generating Dam-Break Flow in Non-Rectangular Wet Bed Channels
title_sort	gate-opening criterion for generating dam-break flow in non-rectangular wet bed channels
publisher	MDPI AG
series	Energies
issn	1996-1073
publishDate	2020-11-01
description	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.
topic	gate-opening time criterion dam-break wave non-rectangular channel wet-bed LES
url	https://www.mdpi.com/1996-1073/13/23/6280
work_keys_str_mv	AT shayang gateopeningcriterionforgeneratingdambreakflowinnonrectangularwetbedchannels AT bowang gateopeningcriterionforgeneratingdambreakflowinnonrectangularwetbedchannels AT yakunguo gateopeningcriterionforgeneratingdambreakflowinnonrectangularwetbedchannels AT jianminzhang gateopeningcriterionforgeneratingdambreakflowinnonrectangularwetbedchannels AT yunliangchen gateopeningcriterionforgeneratingdambreakflowinnonrectangularwetbedchannels
_version_	1724412761309446144

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

Similar Items