Regensburg 2010 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 9: Granular Matter/ Contact Dynamics I

DY 9.7: Talk

Tuesday, March 23, 2010, 11:30–11:45, H47

Compressible kinematic modeling — •Claas Bierwisch and Michael Moseler — Fraunhofer-Institut für Werkstoffmechanik IWM, Wöhlerstr. 11, 79108 Freiburg

Granular discharge from a hopper through a slit orifice is studied using discrete element method simulations. A common continuum approach to describe the velocity field is given by kinematic modeling. This method is refined by considering volume fraction variations within the flowing granular material. A relationship between the local volume fraction and a parameter which couples the horizontal and vertical velocity component was discovered. Considerable increase in accuracy is demonstrated by using this relationship in combination with the proposed compressible kinematic modeling.