Berlin 2008 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Granular matter II

DY 24.9: Talk

Thursday, February 28, 2008, 12:00–12:15, MA 004

Grain coarsening effects in granular statics and dynamics — •Claas Bierwisch and Michael Moseler — Fraunhofer-Institut für Werkstoffmechanik IWM, Wöhlerstraße 11, 79108 Freiburg, Germany

The influence of grain coarsening on static and dynamic properties of frictional and cohesive grains has been studied using discrete element simulations. Volume fraction, coordination number and angle of repose have been studied as static fingerprints of the systems while the outflow rate through an orifice reflects dynamic behavior. The effect of coarsening dependend model parameters is analyzed. Surface and boundary effects in both static and dynamic regimes are highlighted and quantified. Furthermore, similarities between complex shaped particles and spheres without rotational freedom are discussed.