Tectonic inheritance controls nappe detachment, transport and stacking in the Helvetic nappe system, Switzerland: insights from thermomechanical simulations [PDF]
Solid Earth, 2020 Tectonic nappes have been investigated for more than a hundred years. Although geological studies often refer to a “nappe theory”, the physical mechanisms of nappe formation are still disputed. We apply two-dimensional numerical simulations of shortening
D. Kiss +3 more
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Stability of Solids in Stepped Flume Nappe Flows: Subsidies for Human Stability in Flows
Journal of Applied Fluid Mechanics, 2021 Knowing the details of the interaction between people and runoff flows caused by heavy rainfall or by floods due for example by the rupture of reservoirs or dams is essential to prevent accidents with humans. There are information in the literature on the equilibrium capacity of individuals partially immersed in flows occurring in flat-bottomed ...
H. de B. Ribeiro +4 more
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Effect of Orientation and Vegetation over the Embankment Crest for Energy Reduction at Downstream
Geosciences, 2022 Coastal embankments often collapse due to the tremendous destructive energy of an overtopping tsunami flow due to a deep scour by nappe flow. Hence, to clarify the nappe flow formation condition due to the overtopping, a series of tests were carried out ...
Kannangara D. C. R. Dissanayaka +2 more
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Nappe Flow Characteristics over Stepped Spill Ways.(Dept.C) [PDF]
MEJ. Mansoura Engineering Journal, 2021 Stepped spillways are structurally stable, resistance to water loads, and efficient. energy dissipators, but there are no clear design rules for such structures to date. In the present study, the flow characteristics over stepped spillways were investigated for three different step configurations and for different flow parameters, using physical models.
M. M. Elfiky, U. Frantino, A. Haddad
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Numerical simulation study on spread angle in oblique cut flip bucket
Engineering Applications of Computational Fluid Mechanics, 2023 With the advantages of simple structure, good energy dissipation effect and so on, the sky jump energy dissipation is widely used in energy dissipation of water conservancy project.
Yu-bo Ran +4 more
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Control of 3-D tectonic inheritance on fold-and-thrust belts: insights from 3-D numerical models and application to the Helvetic nappe system [PDF]
Solid Earth, 2020 We apply three-dimensional (3-D) thermo-mechanical numerical simulations of the shortening of the upper crustal region of a passive margin in order to investigate the control of 3-D laterally variable inherited structures on fold-and-thrust belt ...
R. Spitz +5 more
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Experimental Study of Flow Regimes of Stepped Weir
Wasit Journal of Engineering Sciences, 2023 • Depending on the discharge and the stepped weir's dimensions, flow over a stepped weir can be primarily divided into three different flow regimes: nappe, transition, and skimming. The different properties for each flow regime make the decision of the
Samaa Hussein, Mohammed Shamkhi
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Numerical study of energy dissipation and block barriers in stepped spillways
Journal of Hydroinformatics, 2021 In this research, the accuracy of the Flow-3D numerical model in the flow simulation in a stepped spillway was probed using data obtained from the physical model. In addition, the effects of block barriers on the energy dissipation rate were investigated.
Mehdi Karami Moghadam +2 more
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Analysis of two-phase flows in plunge pools of nappe jets [PDF]
Proceedings of the 8th IAHR International Symposium on Hydraulic Structures ISHS2020, 2020 This study presents an experimental work to analyse the submerged hydraulic jump generated downstream of overflow nappe impinging jets. The overflow structure consists in a sharp-crested weir located at an elevation of 2.20 m from the bottom of the plunge pool.
Carrillo Sánchez, José María +3 more
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Investigation of the Effect of Ramp Angle on Chute Aeration System Efficiency by Two-Phase Flow Analysis [PDF]
علوم و مهندسی آبیاری, 2021 Flow aeration in chute spillway is one of the most effective and economic ways to prevent cavitation damage. Surface damage is significantly reduced when very small values of air are scattered in a water prism. A structure known as an aerator may be used
Babak Lashkar-Ara, Leila Najafi
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