Interaction between super-quadric particles and triangular elements andits application to hopper discharge

Deep learning-based prediction of piled-up status and payload distribution of bulk material

“…Lu G. et al [27] found that the particle shape has a great influence on the static and dynamic properties of particle systems. Dynamic hopper discharge of irregular non-spherical particles was analyzed by Wang S. et al [28], and the accuracy of the model was verified by the results of both experiments and simulations. However, most of the particles in the current studies are simplified based on analytical numerical studies that can be described with mathematical equations.…”

An energy-conserving contact theory for discrete element modelling of arbitrarily shaped particles: Contact volume based model and computational issues

“…Applications of this model to achieve stable DEM simulations for nonspherical or irregular particles can be found, for instance, in [8] for 2D polygons, [9] for convex polyhedra, and in [10] for decomposable non-convex shapes. However, as the contact volume is involved either explicitly or implicitly, the associated computational cost can be high for other shapes, such as super-quadrics [11,12,13] and dilated particles [14,15,16]. This high computational cost can hinder the wider application of the model in DEM.…”

The Minkowski overlap and the energy‐conserving contact model for discrete element modeling of convex nonspherical particles

“…In almost all existing contact models for convex particles, including spheres and nonspherical shapes such as polyhedra, 3 cylinders, 4 superquadrics, 5 superellipsoids, 6 and dilated particles, 7,8 the contact overlap has been the dominant contact feature that is adopted to define various normal contact models to compute contact forces. The main issue associated with these contact models is that the definition of the contact overlap for a pair of nonspherical particles is often established on an ad hoc basis rather than based on a sound contact theory.…”