Quantitative predictions of the μ(I) rheology in 2D and 3D granular column collapse: scaling laws and quasi-static vs. inertial regimes

Rudy Valette (1) , Stéphanie Riber (1) , Elie Hachem (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

We introduce an accurate numerical method for the computation of 2D and 3D granular collapse under gravity flows using the μ(I) rheology. We show that this rheology can capture the two experimentally observed types of spreading and the corresponding scaling laws, and we provide an accurate sensitivity analysis to rheological constants. Finally, we underline the role of time-dependency on the spreading dynamics.

Mots clés: numerical method; rheology

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Rudy Valette, Stéphanie Riber, Elie Hachem. Quantitative predictions of the μ(I) rheology in 2D and 3D granular column collapse: scaling laws and quasi-static vs. inertial regimes. Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media , Jul 2017, Montpellier, France. pp.Article number 11005, ⟨10.1051/epjconf/201714011005⟩. ⟨hal-01570579⟩