ABSTRACT
Of interest both in geophysics and for industrial processes, dense granular flows, close to the jamming transition, are still not well understood (Pouliquen & Chevoir, 2002; GDR 2004). Complementary to physical experiments with model materials, discrete numerical simulations give access to detailed quantities inside the flow. From those quantities, it is possible to deduce the constitutive laws in velocity controlled simulations, and the jamming mechanisms in stress controlled simulations. In the following, we shall first describe the simulated systems and the simulation methods. Then, we will discuss the constitutive law in the simplest case of an homogeneous shear. Last, we will discuss the influence of the wall roughness and the jamming transition for inclined plane flows.
