Author(s): I. R. Ionescu; O. Lupascu; S. Vasile

Linked Author(s):

Keywords: Granular flows; Saint-Venant model; Drucker-Prager yield stress; Coulomb friction; Finite element-discontinuous Galerkin method

Abstract: Dry granular flows over a basal surface with a topography are simulated by using a Saint-Venant model of dense avalanches developed in [2]. The model is associated to a Drucker-Prager yield stress, a variable viscosity and a basal Coulomb friction. The numerical method makes use of an implicit time discretization and a FE(Finite Element/)-DG(Discontinuous Galerkin) spatial discretization. Quantitative comparison between experimental and numerical changes with time of the thickness profiles and front velocity makes it possible to strongly constrain the rheology.

DOI: https://doi.org/10.3850/978-981-11-2731-1_072-cd

Year: 2018