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Multiphase debris flow simulations with the discrete element method coupled with a lattice-boltzmann fluid
dc.contributor.author | Leonardi, Alessandro |
dc.contributor.author | Wittel, Falk K. |
dc.contributor.author | Mendoza, Miller |
dc.contributor.author | Herrmann, J. |
dc.date.accessioned | 2020-05-21T10:32:46Z |
dc.date.available | 2020-05-21T10:32:46Z |
dc.date.issued | 2013 |
dc.identifier.isbn | 978-84-941531-8-1 |
dc.identifier.uri | http://hdl.handle.net/2117/188456 |
dc.description.abstract | Debris flows are dangerous natural hazards that occur mainly in mountainous terrains after heavy rainfall, responsible for casualties and damages reported yearly worldwide. Their heterogeneous composition, with a viscoplastic fluid and the presence of a relevant granular solid phase, leads to a non-trivial behaviour making them a challenging problem both for the physical description of the phenomena and for the design of effective protection measures. A numerical model is developed, fully coupling the two phases. A Discrete Element approach is used for the description of the solid phase, with a realistic particle size distribution, while the fluid phase is solved with a Lattice-Boltzmann Method. The effect of shape on the rolling mechanism is included with a simplified model, as well as the effects of non-Newtonian rheology and the presence of a free surface. The numerical results provide insight into complex segregation, transportation and sedimentation phenomena, essential for understanding and predicting the run-out mechanism of debris avalanches and their interaction with obstacles and retaining structures. |
dc.format.extent | 12 p. |
dc.language.iso | eng |
dc.publisher | CIMNE |
dc.subject | Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits |
dc.subject.lcsh | Finite element method |
dc.subject.lcsh | Computational methods in mechanics |
dc.subject.lcsh | Particle methods (Numerical analysis) |
dc.subject.other | Debris Flow, Particle-fluid, Hybrid, LBM, DEM |
dc.title | Multiphase debris flow simulations with the discrete element method coupled with a lattice-boltzmann fluid |
dc.type | Conference report |
dc.subject.lemac | Elements finits, Mètode dels |
dc.rights.access | Open Access |
local.citation.contributor | PARTICLES III |
local.citation.publicationName | PARTICLES III : proceedings of the III International Conference on Particle-Based Methods : fundamentals and applications |
local.citation.startingPage | 276 |
local.citation.endingPage | 287 |