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DY: Fachverband Dynamik und Statistische Physik

DY 31: Granular matter / contact dynamics II

DY 31.1: Talk

Friday, March 30, 2007, 10:15–10:30, H2

About contact models for granular matter — •Stefan Luding — Particle Technology, Nanostructured Materials, DelftChemTech, TUDelft, Julianalaan 136, 2628 BL Delft, NL

In adhesive granular matter, phenomena like cohesion, agglomeration, sintering, compaction and fracture can be observed. The basic ingredient for the discrete modeling of granular matter is the contact model that enters the Molecular Dynamics like simulation algorithm. A contact model is presented that does not only allow for simulation of rather large granular matter in the milli-meter range, but also for much finer particles in the micro-meter range or even smaller. Besides dissipation and elasticity, the contact model involves plastic deformation, contact-adhesion, tangential friction, and rolling-resistance as well as torque-resistance. Agglomeration, pressure-sintering and tensile tests can now be examined with a single contact model.