Скачать с ютуб Contact detection in Poly ellipsoidal Particles (LIGGGHTS) в хорошем качестве

Contact detection in Poly ellipsoidal Particles (LIGGGHTS)

I conducted a simulation involving 20 non-spherical particles using the Discrete Element Method (DEM). The particles were created with various dimensions to achieve a specific size distribution which is mean_values = [0.00025, 0.00025, 0.0005], wit stddev_values = [0.00005, 0.00005, 0.00005] and varying orientations Each particle had unique orientations, initial velocities, and positions to allow for natural interactions under the influence of gravity. I utilized LIGGGHTS 3.8 for this simulation. For contact detection, LIGGGHTS utilized Bounding Volume Hierarchies (BVH), facet-facet and edge-edge interactions with the Separating Axis Theorem (SAT), as well as ellipsoidal contact algorithms such as the GJK method. (Refer ) The force calculations were based on the soft-sphere model, which employs a spring-dashpot system for normal and tangential forces. Translational motion was handled using the Velocity-Verlet scheme, while quaternion-based integration managed rotations. Additionally, at frame 34 of the simulation, I visualized 9 contacts, which helped in estimating the coordination number of the non-spherical particles in general.