It looks like you are referring to the paper titled (or similar variations like "complex granular systems").

: How to move beyond simple spheres by using "clumped" spheres, super-ellipsoids, or polyhedral meshes to represent real-world grain shapes. Discrete element method modelling of complex gr...

: Practical uses in industrial processes like silo discharge, mixing, milling, or soil-tool interactions in agriculture. It looks like you are referring to the