Modelling multi-phase liquid-sediment scour and resuspension induced by rapid flows using Smoothed Particle Hydrodynamics (SPH) accelerated with a Graphics Processing Unit (GPU)

Fourtakas, Georgios; Rogers, Benedict D.

doi:10.1016/j.advwatres.2016.04.009

Cited by 133 publications

(57 citation statements)

References 33 publications

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“…In many applications, the shifting methodology is found to be essential for both single-phase Newtonian and inelastic non-Newtonian applications as shown in Lind et al [20] and Xenakis et al [21], respectively, while it has recently proved to be beneficial in multi-phase SPH simulations (e.g. [29,30]). In this work, the compound shifting method [31] is used with…”

Section: Methods (A) Governing Equationsmentioning

confidence: 99%

“…Saturation models have previously been implemented in SPH applications (e.g. [30,[45][46][47][48]). The seepage force and the water pressure along with yield criteria, such as the Mohr-Coulomb and the Drucker-Prager, are commonly implemented in the aforementioned techniques.…”

Section: Power-law Modelmentioning

confidence: 99%

“…To overcome this issue, several different approaches have been used where the solid zone of the Bingham fluid is approximated by a highly viscous fluid (e.g. [25,30,[40][41][42]). In this work, the bilinear model as presented by Hosseini et al [41] is implemented, with…”

Section: Power-law Modelmentioning

confidence: 99%

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Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment

et al. 2017

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Tsunamis caused by landslides may result in significant destruction of the surroundings with both societal and industrial impact. The 1958 Lituya Bay landslide and tsunami is a recent and well-documented terrestrial landslide generating a tsunami with a run-up of 524 m. Although recent computational techniques have shown good performance in the estimation of the run-up height, they fail to capture all the physical processes, in particular, the landslide-entry profile and interaction with the water. Smoothed particle hydrodynamics (SPH) is a versatile numerical technique for describing free-surface and multi-phase flows, particularly those that exhibit highly nonlinear deformation in landslide-generated tsunamis. In the current work, the novel multi-phase incompressible SPH method with shifting is applied to the Lituya Bay tsunami and landslide and is the first methodology able to reproduce realistically both the run-up and landslide-entry as documented in a benchmark experiment. The method is the first paper to develop a realistic implementation of the physics that in addition to the non-Newtonian rheology of the landslide includes turbulence in the water phase and soil saturation. Sensitivity to the experimental initial conditions is also considered. This work demonstrates the ability of the proposed method in modelling challenging environmental multi-phase, non-Newtonian and turbulent flows.

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Section: Methods (A) Governing Equationsmentioning

confidence: 99%

Section: Power-law Modelmentioning

confidence: 99%

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Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment

et al. 2017

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“…Some known viscoplastic models with a particular yield stress for the motion threshold are: Herschel-Bulkley, Cross, Bingham, etc. (Khanpour et al 2016;Fourtakas and Rogers, 2016). Szewc (2017) implemented the Cross rheological model in SPH code developed for numerical models.…”

Section: Introductionmentioning

confidence: 99%

Effective Pressure for Two Phase Water-Sediment Models using SPH Method

Kheirkhahan¹,

Omidvar²,

Hosseini³

2020

JAFM

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Sediment transport in the aquatic environment is one of the complex two-phase problems in flow mechanics and sediment hydraulics. In this study, the interaction between water and sediment is explored using the SPH method and developed SPHysics2D in which the pressure values are calculated using the state equation. In this study, the non-Newtonian rheological model µ(I) is used for modeling the sediment phase where it is developed based on the properties of granular particles. Also, the effective pressure is used for the study of sediment behavior. The method used in this research is compared with the methods used by other researchers. The Owen equation is utilized to determine the effect of viscosity within the two-phase area. The developed method is evaluated by the dam break on a dynamic bed and then, the experimental model of submerged sediment column collapse is investigated in the aquatic environment. The results of the modeling demonstrate the capabilities of the developed code for the use in the flow and sediment hydraulics.

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“…The problem is illustrated in Figure 2 showing on the left-hand panel the water and solid bed distribution at the initial time; this demonstrative test represents a modification of an erosional dam break tutorial available in SPHERA v8.0 package [35] and shares some relevant features with similar laboratory tests that have been adopted for numerical model validation, including weakly compressible SPH [57,58] and incompressible SPH [29]. In the performed test, the initial depth of the water column is much greater than the thickness of the bed sediment, resulting in a higher and faster excavation at the wave front, as shown by the representative frames on the right-hand side of Figure 2.…”

Section: Two-dimensional Erosive Dam Breakmentioning

confidence: 99%

WCSPH with Limiting Viscosity for Modeling Landslide Hazard at the Slopes of Artificial Reservoir

Manenti

Amicarelli²,

Todeschini

2018

Water

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Abstract:This work illustrated an application of the FOSS code SPHERA v.8.0 (RSE SpA, Milano, Italy) to the simulation of landslide hazard at the slope of a water basin. SPHERA is based on the weakly compressible SPH method (WCSPH) and holds a mixture model, consistent with the packing limit of the Kinetic Theory of Granular Flow (KTGF), which was previously tested for simulating two-phase free-surface rapid flows involving water-sediment interaction. In this study a limiting viscosity parameter was implemented in the previous formulation of the mixture model to limit the growth of the apparent viscosity, thus saving computational time while preserving the solution accuracy. This approach is consistent with the experimental behavior of high polymer solutions for which an almost constant value of viscosity may be approached at very low deformation rates near the transition zone of elastic-plastic regime. In this application, the limiting viscosity was used as a numerical parameter for optimization of the computation. Some preliminary tests were performed by simulating a 2D erosional dam break, proving that a proper selection of the limiting viscosity leads to a considerable drop of the computational time without altering significantly the numerical solution. SPHERA was then validated by simulating a 2D scale experiment reproducing the early phase of the Vajont landslide when a tsunami wave was generated that climbed the opposite mountain side with a maximum run-up of about 270 m. The obtained maximum run-up was very close to the experimental result. Influence of saturation of the landslide material below the still water level was also accounted, showing that the landslide dynamics can be better represented and the wave run-up can be properly estimated.

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Modelling multi-phase liquid-sediment scour and resuspension induced by rapid flows using Smoothed Particle Hydrodynamics (SPH) accelerated with a Graphics Processing Unit (GPU)

Cited by 133 publications

References 33 publications

Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment

Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment

Effective Pressure for Two Phase Water-Sediment Models using SPH Method

WCSPH with Limiting Viscosity for Modeling Landslide Hazard at the Slopes of Artificial Reservoir

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