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dc.contributor.authorLeonardi, Alessandro
dc.contributor.authorWittel, Falk K.
dc.contributor.authorMendoza, Miller
dc.contributor.authorHerrmann, J.
dc.date.accessioned2020-05-21T10:32:46Z
dc.date.available2020-05-21T10:32:46Z
dc.date.issued2013
dc.identifier.isbn978-84-941531-8-1
dc.identifier.urihttp://hdl.handle.net/2117/188456
dc.description.abstractDebris 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.extent12 p.
dc.language.isoeng
dc.publisherCIMNE
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits
dc.subject.lcshFinite element method
dc.subject.lcshComputational methods in mechanics
dc.subject.lcshParticle methods (Numerical analysis)
dc.subject.otherDebris Flow, Particle-fluid, Hybrid, LBM, DEM
dc.titleMultiphase debris flow simulations with the discrete element method coupled with a lattice-boltzmann fluid
dc.typeConference report
dc.subject.lemacElements finits, Mètode dels
dc.rights.accessOpen Access
local.citation.contributorPARTICLES III
local.citation.publicationNamePARTICLES III : proceedings of the III International Conference on Particle-Based Methods : fundamentals and applications
local.citation.startingPage276
local.citation.endingPage287


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