ABSTRACT
The flows are simulated by standard molecular dynamics method adapted to visco-elastic frictional grains (Roux & Chevoir 2005). The simulations were done with a friction coefficient 0.4, a coefficient of normal restitution 0.1, and in the limit of rigid grains (the relative deformation of the grains remain smaller than 10−3). Consequently, the gravity time scale
√ ds/g is much larger than the coll-
ision time. A dense layer of height H flows down a rough
inclined plane (inclination θ) under the influence of gravity g (Fig. 1). Periodic boundary conditions are applied along the flow direction x. The roughness is made of contiguous grains sharing the characteristics of the small flowing grains.
