Simulation of liquefied sand by the Lattice Boltzmann method

Schenkengel, Kay‐Uwe; Vrettos, Christos

doi:10.1002/gete.201300017

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…To overcome the intrinsic difficulties associated with free‐surface flow problems, Pastor et al() and Huang et al() resorted to smoothed particle hydrodynamics (SPH) to model the flow of fluidised geomaterials. More recently, Schenkengel and Vrettos embraced the framework of statistical mechanics and applied a Lattice Boltzmann method to simulate the liquefaction‐induced flow observed in shaking table tests, slope failure, and around an embedded rigid wall. As stressed later in this work, the so‐called particle finite element method (PFEM) has also proven a very suitable CFD approach for free‐surface flow problems,() mostly due to the fully Lagrangian formulation/solution of the problem.…”

Section: Introductionmentioning

confidence: 99%

On the rheological characterisation of liquefied sands through the dam‐breaking test

Vecchia

Cremonesi

Pisanò

2019

Num Anal Meth Geomechanics

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Summary This paper concerns the rheological characterisation of liquefied sands as non‐Newtonian Bingham fluids. For this purpose, dam‐breaking laboratory tests are often executed and interpreted, offering a viable option to identify the properties of fluidised water‐soil mixtures. However, limited attention has been devoted so far to clarify what variables and measurements would allow unambiguous calibration of Bingham parameters, namely, the viscosity η and the yield stress τy. The numerical results of parametric studies based on the particle finite element method (PFEM) are critically inspected to gain deeper insight into the problem. First, it is confirmed that multiple η − τy pairs may reproduce the same experimental evidence when formed by only one measurement—usually, the post–dam‐breaking displacement of the bottom toe (tip) of the liquefied mass. Then, two alternative procedures are proposed for unambiguous identification of both η and τy: one is based on monitoring the evolving aspect ratio of the fluid mass during free, gravity‐driven flow; the other relies on a slightly different dam‐breaking test, also including impact against a rigid obstacle. In particular, the latter approach reduces the relevant duration of the test, reducing the possible influence of reconsolidation effects on the calibration of rheological parameters.

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Section: Introductionmentioning

confidence: 99%

On the rheological characterisation of liquefied sands through the dam‐breaking test

Vecchia

Cremonesi

Pisanò

2019

Num Anal Meth Geomechanics

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Experimental study of factors affecting the viscosity-based pore pressure generation model and the pseudo plastic behaviour of liquefiable soils

Mele,

Lirer,

Flora

2024

Soils and Foundations

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Liquefaction triggering of non-saturated sandy soils

Mele¹,

Lirer

Flora³

2023

Géotechnique Letters

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In saturated sandy soils liquefaction triggering is generally well-identified according to stress or strain criteria. On the contrary, the attainment of liquefaction in non-saturated sandy soils is still cause of discussion in scientific community. Even if the liquefaction resistance of non-saturated soils is higher than that of saturated ones, these soils may liquefy, as well. The increasing interest for cyclically mechanical behaviour of non-saturated sandy soils is due to the fact that desaturation or induced partial saturation (IPS) can be used as useful mitigation techniques against soil liquefaction. Therefore, it is important to define, as accurately as possible, the attainment of liquefaction, on which depends the estimation of liquefaction resistance. It has been already demonstrated the relevance of the apparent viscosity as a physically based parameter for the correct identification of the liquefaction triggering for fully saturated soils. In this paper the viscous triggering approach has been used for non-saturated soils too, processing some cyclic triaxial tests carried out on different sandy soils. The results confirm the reliability of the apparent viscosity as a liquefaction triggering parameter, showing a tight correlation with the strain liquefaction triggering criterion. Therefore, it confirms the correct choice of strain criterion for identifying the attainment of liquefaction in non-saturated sandy soils.

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Simulation of liquefied sand by the Lattice Boltzmann method

Cited by 4 publications

References 23 publications

On the rheological characterisation of liquefied sands through the dam‐breaking test

On the rheological characterisation of liquefied sands through the dam‐breaking test

Experimental study of factors affecting the viscosity-based pore pressure generation model and the pseudo plastic behaviour of liquefiable soils

Liquefaction triggering of non-saturated sandy soils

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