Experimental investigation of dynamic pressure loads during dam break

Lobovský, Libor; Botía-Vera, E.; Castellana, F.; Mas-Soler, J.; Souto-Iglesias, Antonio

doi:10.1016/j.jfluidstructs.2014.03.009

Cited by 284 publications

(201 citation statements)

References 50 publications

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“…The Froude number (Fr) is widely adopted for characterising the dynamic similarity in channelized granular flows (Chehata et al 2003;Hauksson et al 2007;Choi et al 2014), hydraulics (Armanini et al 2011;Lobovský et al 2014), and geophysical flows (Hübl et al 2009). The Fr macroscopically quantifies the ratio between the inertial and gravitational forces and is expressed as follows:…”

Section: Dimensionless Group For Debris Flow Characterizationmentioning

confidence: 99%

Influence of debris flow solid fraction on rigid barrier impact

et al. 2017

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Abstract:The dynamics of debris flows are fundamentally governed by the interaction between the solid and fluid phases. However, current approaches used to estimate impact load treat debris flow as an equivalent fluid without considering solid-fluid interaction separately from other factors. In this study, a series of centrifuge tests were carried out to investigate the influence of interaction between solid and fluid phases on single-surge debris flow impact on rigid barrier. The effect of solid-fluid interaction was studied by varying the solid fraction of the flows. A model rigid barrier was instrumented to capture induced bending moment and impact pressure. Test results demonstrate that the transition from a pile-up mechanism to a run-up mechanism is governed by the solid fraction and thus the grain contact stresses. The rigid barrier design for the impact with pile-up mechanism is mainly dominated by the static load. Contrary to the hydrodynamic approach which assumes that the frontal impact is the most critical, the frontal impact of run-up mechanism contributes less than 25% of the total force impulse. The consideration of static loading leads to the development of a new impact model with a triangular distribution of the impact pressure.

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Section: Dimensionless Group For Debris Flow Characterizationmentioning

confidence: 99%

Influence of debris flow solid fraction on rigid barrier impact

et al. 2017

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“…Water exchange between the compartments through non-watertight openings in a harmonic motion of the compartment has been studied by Manderbacka et al (2014). The beginning of the flooding resembles a dam-breaking problem which has been widely studied both numerically and experimentally (Lobovský et al, 2014). However, the damaged ship response complicates the problem.…”

Section: Introductionmentioning

confidence: 99%

Model experiments of the transient response to flooding of the box shaped barge

Manderbacka

Ruponen

Kulovesi

et al. 2015

Journal of Fluids and Structures

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“…Normally, the velocity and pressure on the marker are interpolated based on the concept of weighted average of neighboring particles, which is the fundamental equation of SPH as in the Equation (6). However, the portion of the particles within the compact support might be in the wall domain or unoccupied domain…”

Section: Slip and Non-slip Condition With Virtual Markermentioning

confidence: 99%

“…The experimental test on the investigation of dynamic pressure loads during dam break with an opening gate that was carried out at Technical University of Madrid (UPM) as reported by Lobovsky [6] is used as the reference for simulate purposed and design the analysis model as shown in the schematic diagram (Figure 4). The clear comparison of free surface profile evolution snapshot between the numerical simulation and the experimental at certain times as shown in Figure 5 and the effect of the dam gate removal looks similar at every snapshot on the free surface shape is observed.…”

Section: Validation With 3d Dam Break Flow With the Opening Gatementioning

confidence: 99%

The Modification of Boundary Treatment in the Incompressible SPH for Pressure Calculation Accuracy on the Solid Boundary

Idris

Asai

Sonoda

2016

MATEC Web of Conferences

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Abstract. The Incompressible Smoothed Particle Hydrodynamic (ISPH) is one of the particle methods and commonly used to solve some complicated physical problems including free surface flow problems. The study regarding the boundary treatment has become an active research area in the mesh-free or particle method recently for measuring the accurate and robust pressure near the boundary. The penetrations of fluid particles may be happened if the adequate pressure boundary condition on the solid boundary cannot be satisfied. In this paper, a simple boundary treatment, which can be satisfied the non-homogenous Neumann boundary condition on the solid boundary and Dirichlet condition on the water surface, is proposed. The key point of our proposed treatment is that these boundary conditions are automatically satisfied by solving a modified pressure Poisson equation. Lastly, the effectiveness and accuracy of boundary treatment proposed are then authenticated with couples of numerical analysis and compared with the experimental tests.

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Experimental investigation of dynamic pressure loads during dam break

Cited by 284 publications

References 50 publications

Influence of debris flow solid fraction on rigid barrier impact

Influence of debris flow solid fraction on rigid barrier impact

Model experiments of the transient response to flooding of the box shaped barge

The Modification of Boundary Treatment in the Incompressible SPH for Pressure Calculation Accuracy on the Solid Boundary

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