Sliding of particles with different patterns

The piled particles of different shapes (Clump composed of multiple units) are placed on the upper left, and the ball particles are placed in regular arrangement on the upper right, falling freely, colliding and stacking under the action of gravity.The colors represent stress.See software examples BoxSlope and MatDEM tutorial 6: modular modeling - building arbitrary discrete element models.

The following is a large-scale example.490,000 basic particles, 7.5 hours of computation, 2.2 seconds of simulation of the real world.The color in the figure represents the particle number.

The following is a larger-scale example.2.35 million basic particles and 830,000 motion particles, 60 hours of  computation ,1.41 seconds  of simulation of the real world.The color in the figure represents the particle number.