ABSTRACT
The investigated granular system is a two-dimensional assembly of 4000 discs with diameters uniformly distributed between Dmin and Dmax with Dmax = 3Dmin. The particles interact through a stiff linear repulsive force as a function of mutual overlaps and the Coulomb friction law. The coefficient of friction is 0.5. The equations of motion for particle displacements and rotations are integrated by means of a predictor-corrector scheme (Allen & Tildesley 1987).
