A numerical experiment of backward erosion piping: kinematics and micromechanics

Autor: Andrea Francesco Rotunno, Francesco Froiio, Carlo Callari
Přispěvatelé: Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), Université de Lyon, Dipartimento di Bioscienze e Territorio (DiBT), Università degli Studi del Molise, Università degli Studi del Molise (Unimol), Dipartimento di Ingegneria Civile e Ingegneria Informatica (DICII), Università degli Studi di Roma Tor Vergata [Roma]
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Lattice Boltzmann method
Lattice Boltzmann methods
02 engineering and technology
Granular material
01 natural sciences
Discrete element method
Backward erosion piping
Internal erosion
0203 mechanical engineering
Earth dams
0103 physical sciences
[PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph]
Coupling (piping)
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
Force chain
010301 acoustics
Granular materials
Piping
Mechanical Engineering
[SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique
Micromechanics
Mechanics
Condensed Matter Physics
Levees
[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering
020303 mechanical engineering & transports
Mechanics of Materials
Dikes
Geology
Granular materials
Discrete element method
Lattice Boltzmann method
Internal erosion
Backward erosion piping
Earth dams
Dikes
Levees
Zdroj: Meccanica
Meccanica, Springer Verlag, In press
ISSN: 0025-6455
1572-9648
Popis: International audience; We report on a numerical experiment by which we investigated the propagation of an erosion pipe in a water saturated granular soil. The simulation was performed with a two-dimensional implementation of the coupling between the discrete element method and the lattice Boltzmann method. A synopsis of the numerical scheme is provided. The specimen and testing conditions were designed as representative of the pipe front region. The kinematics of mobilisa-tion and fluidisation of the granular mass were investigated based on the physically-motivated definition of particle velocity thresholds. We measured a constant mass erosion rate, up to a clogging event. The study includes a micromechanical analysis of the response of the granular skeleton. We emphasise the influence of the unloading-induced damage on the erosion path, and the relevance of force chain arching as a self-organised resistance mechanism.
Databáze: OpenAIRE
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