Numerical modelling of backward front propagation in piping erosion by DEM-LBM coupling
Autor: | Eric Vincens, Carlo Callari, Duc Kien Tran, Noémie Prime, Francesco Froiio |
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Přispěvatelé: | Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement (LOCIE), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
Rok vydání: | 2016 |
Předmět: |
Engineering
Environmental Engineering Scale (ratio) 0211 other engineering and technologies Lattice Boltzmann methods Phase (waves) 02 engineering and technology 01 natural sciences backward erosion discrete element method lattice Boltzmann method piping erosion Civil and Structural Engineering 010305 fluids & plasmas [SPI]Engineering Sciences [physics] 0103 physical sciences Coupling (piping) Geotechnical engineering ComputingMilieux_MISCELLANEOUS 021101 geological & geomatics engineering Piping business.industry Mechanics Discrete element method Erosion business Numerical stability |
Zdroj: | European Journal of Environmental and Civil Engineering European Journal of Environmental and Civil Engineering, Taylor & Francis, 2016, 21 (7-8), pp.960-987. ⟨10.1080/19648189.2016.1248794⟩ |
ISSN: | 2116-7214 1964-8189 |
DOI: | 10.1080/19648189.2016.1248794 |
Popis: | A granular soil REV located on the upstream side of the erosion pipe front is modelled numerically, at the grain scale, by coupling the Discrete Element Method (DEM) with the Lattice Boltzmann Method (LBM) for the representation of the solid and fluid phases, respectively. The implementation of DEM follows a standard molecular dynamics approach and the interactions between grains are regulated by unilateral contacts and breakable bonds. A synopsis of the LBM scheme is provided, with focus on the implementation of non-slip conditions for moving boundaries and use of the Multiple Relaxation Time approach for improved numerical stability. The coupling scheme is described along with the criteria for setting the numerical parameters of the two methods. After a “dry” preparation procedure, the numerical REV is tested under fully saturated conditions and increasing pressure difference. Backward erosion is observed and a micromechanical inspection of the granular phase suggests that arching through force ... |
Databáze: | OpenAIRE |
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