Numerical simulation of mud-flows impacting structures

Greco, Massimo; Cristo, Cristiana Di; Iervolino, Michele; Vacca, Andrea

doi:10.1007/s11629-018-5279-5

Cited by 23 publications

(5 citation statements)

References 81 publications

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“…A variety of existing landslide models simulate the behaviour of lateral connected material through a non-linear, non-Newtonian viscous relationship (von Boetticher et al, 2017;Fornes et al, 2017;Pudasaini and Mergili, 2019;Greco et al, 2019). These relationships include a yield stress and are usually regularized to prevent singularities from occurring.…”

Section: Discussionmentioning

confidence: 99%

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Towards a model for structured mass movements: the OpenLISEM hazard model 2.0a

Bout

Asch

et al. 2021

Geosci. Model Dev.

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Abstract. Mass movements such as debris flows and landslides differ in behaviour due to their material properties and internal forces. Models employ generalized multi-phase flow equations to adaptively describe these complex flow types. Such models commonly assume unstructured and fragmented flow, where internal cohesive strength is insignificant. In this work, existing work on two-phase mass movement equations are extended to include a full stress–strain relationship that allows for runout of (semi-)structured fluid–solid masses. The work provides both the three-dimensional equations and depth-averaged simplifications. The equations are implemented in a hybrid material point method (MPM), which allows for efficient simulation of stress–strain relationships on discrete smooth particles. Using this framework, the developed model is compared to several flume experiments of clay blocks impacting fixed obstacles. Here, both final deposit patterns and fractures compare well to simulations. Additionally, numerical tests are performed to showcase the range of dynamical behaviour produced by the model. Important processes such as fracturing, fragmentation and fluid release are captured by the model. While this provides an important step towards complete mass movement models, several new opportunities arise, such as application to fragmenting mass movements and block slides.

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Section: Discussionmentioning

confidence: 99%

“…Additionally, by dissecting the runout process in two stages (discrete block and granular flow), benefits of holistic two-phase generalized runout models are lost. Finally, Greco et al (2019) presented a runout model for cohesive granular matrix. Their approach similarly lacks a description of the fragmentation process.…”

Section: Introductionmentioning

confidence: 99%

Towards a model for structured mass movements: the OpenLISEM hazard model 2.0a

Bout

Asch

et al. 2021

Geosci. Model Dev.

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“…The force exerted on the breakers has also a component normal to the flow direction (i.e. parallel to the y axis), that is about one order less than that along the flow direction (Greco et al, 2019). For this reason and the sake of simplicity, it is not here evaluated.…”

Section: The Model Ofmentioning

confidence: 99%

Model-based approach for design and performance evaluation of works controlling stony debris flows with an application to a case study at Rovina di Cancia (Venetian Dolomites, Northeast Italy)

Bernard

Boreggio

Degetto

et al. 2019

Science of The Total Environment

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“…In predicting the dynamic force generated by a dam-break wave on a rigid structure, Aureli et al [19], showed that a 2D model based on the shallow-water approach leads to an error comparable with the reproducibility of experimental data that is of the order of 10%. Depth-integrated models have also been employed to simulate the impact against rigid obstacles of debris or mud waves [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Impact Force of a Geomorphic Dam-Break Wave against an Obstacle: Effects of Sediment Inertia

Cristo

Greco

Iervolino

et al. 2021

Water

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The evaluation of the impact force on structures due to a flood wave is of utmost importance for estimating physical damage and designing adequate countermeasures. The present study investigates, using 2D shallow-water approximation, the morphodynamics and forces caused by a dam-break wave against a rigid obstacle in the presence of an erodible bed. A widely used coupled equilibrium model, based on the two-dimensional Saint–Venant hydrodynamic equations combined with the sediment continuity Exner equation (SVEM), is compared with a more complex two-phase model (TPM). Considering an experimental set-up presented in the literature with a single rigid obstacle in a channel, two series of tests were performed, assuming sand or light sediments on the bottom. The former test is representative of a typical laboratory experiment, and the latter may be scaled up to a field case. For each test, two different particle diameters were considered. Independently from the particle size, it was found that in the sand tests, SVEM performs similarly to TPM. In the case of light sediment, larger differences are observed, and the SVEM predicts a higher force of about 26% for both considered diameters. The analysis of the flow fields and the morphodynamics shows these differences can be essentially ascribed to the role of inertia of the solid particles.

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Numerical simulation of mud-flows impacting structures

Cited by 23 publications

References 81 publications

Towards a model for structured mass movements: the OpenLISEM hazard model 2.0a

Towards a model for structured mass movements: the OpenLISEM hazard model 2.0a

Model-based approach for design and performance evaluation of works controlling stony debris flows with an application to a case study at Rovina di Cancia (Venetian Dolomites, Northeast Italy)

Impact Force of a Geomorphic Dam-Break Wave against an Obstacle: Effects of Sediment Inertia

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