such as Lauber and Hager reported their experiments on dam-break flows in a horizontal and sloping channel (Lauber and Hager, a, b). W.H. Hager and G. Del Giudice, “Movable bed roughness in alluvial rivers – Discussion”, . G. Lauber and W.H. Hager, “EXPERIMENTS TO DAMBREAK WAVE. Lauber and Hager () derived a solution from the shallow water equations with friction slope in the source term, subjected to the initial condition CDF T=21/2 .
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In all experiments, the abrupt rupture on an absolutely dry tailwater channel was modelled. Views over last 60 days: Experiments to dambreak wave: Return articles published in. Considering the requirements for precise data measurement with high temporal resolution, the synchronization of different instruments was realized based on high-speed camera recording. Also, the drying front is computed and the effect of viscosity is analyzed.
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Hydrodynamic formulae proposed by Lauber and Hager  are not applicable for the wet-bed condition, although their solution of wave profiles for the initial dry-bed condition performs well at the location farther from the gate.
Further, the effect of the relative reservoir length on the wave maximum is specified and a novel dimensionless coordinate X is introduced, that accounts for both relative reservoir length and non-dimensional tailwater location. Return articles authored by. The system can’t perform the operation now. The non-dimensional average front velocity of the wet-bed condition, which mainly depends on the initial water head setting, is smaller than that of the dry-bed case.
November 28, Published: Preview 2 pages 0. In this study, a series of dam-break lsuber was carried out to investigate the influence of the initial downstream water depth, water head settings, and upstream reservoir length on the dam-break wave movement. The instantaneous water level and flow velocity were measured at two specified downstream locations. Return articles dated between. Articles Case law Profiles.
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Dambreak waves in a smooth rectangular and horizontal channel are described. Based on a literature review, the conditions required for Froude similarity are first derived.
In addition, the maximum water level and flow velocity at the downstream location are mainly controlled by the initial water head setting, while the duration of the large values is influenced by the reservoir length. The positive and negative wave fronts are determined based on the characteristic equations.
Even with the same initial water head setting, the hsger level and flow velocity variations of the dam-break wave propagating haged on the wet bed show noteworthy differences in flow characteristics compared to the initial dry bed, caused by the interactions between the upstream and downstream water.
Cited by Related articles All 6 versions. September 16, Accepted: My profile My library. Dambreak flows in a smooth, rectangular channel are considered.
Then, the positive and negative wave fronts are analytically determined, based on the characteristic equations.