LAUSR

Rheology of cohesive granular matter under the constant pressure condition is studied by means of molecular dynamics simulation. Depending on the shear rate, the pressure, and the cohesiveness, the system exhibits four distinctive phases: uniform shear, oscillation, shear-banding, and clustering. The friction coefficient is found to increase with the inertial number irrespective of the cohesiveness. We find an abnormally large friction coefficient for strong cohesion and low pressure. This trend is explained by the anisotropies of the coordination number and the angular distribution of the inter-particle forces. Particularly, we show that the second nearest neighbors play a crucial role in the rheology for cohesive systems.