A two-phase solid-fluid model for dense granular flows including dilatancy effects: comparison with submarine granular collapse experiments

François Bouchut (1) , Enrique Domingo Fernández-Nieto (2) , El Hadji Koné (3) , A. Mangeney (3) , G. Narbona-Reina (2)

1 LAMA - Laboratoire d'Analyse et de Mathématiques Appliquées
2 IMUS - Instituto de Matematicas de la Universidad de Sevilla
3 IPGP - Institut de Physique du Globe de Paris

We simulate here the collapse of granular columns immersed in a viscous fluid based on a simplified version of the model developed by [2]. The simulation quite well reproduces the dynamics and deposit of the granular mass as well as the excess pore fluid pressure measured in the laboratory experiments of [10] owing that dilatancy effects and pore pressure feedback are accounted for. In particular, the difference in the behaviour of initially loose and dense columns is reproduced numerically.

Domaines: Géophysique [physics.geo-ph]; Analyse numérique [math.NA]

François Bouchut, Enrique Domingo Fernández-Nieto, El Hadji Koné, A. Mangeney, G. Narbona-Reina. A two-phase solid-fluid model for dense granular flows including dilatancy effects: comparison with submarine granular collapse experiments. EPJ Web of Conferences, 2017, 140, pp.09039. ⟨10.1051/epjconf/201714009039⟩. ⟨hal-01631797⟩