Schreck, CamilleLefebvre, SylvainJourdan, DavidMartínez, JonàsHu, RuizhenCharalambous, Panayiotis2024-04-302024-04-302024978-3-03868-237-01017-4656https://doi.org/10.2312/egs.20241021https://diglib.eg.org/handle/10.2312/egs20241021Granular materials composed of particles with complex shapes are challenging to simulate due to the high number of collisions between the particles. In this context, star shapes are promising: they cover a wide range of geometries from convex to concave and have interesting geometric properties. We propose an efficient method to simulate a large number of identical star-shaped particles. Our method relies on an effective approximation of the contacts between particles that can handle complex shapes, including highly non-convex ones. We demonstrate our method by implementing it in a 2D simulation using the Discrete Element Method, both on the CPU and GPU.Attribution 4.0 International LicenseCCS Concepts: Computing methodologies → Physical simulation; Collision detectionComputing methodologies → Physical simulationCollision detection10.2312/egs.202410214 pages