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DY: Fachverband Dynamik und Statistische Physik

DY 12: Granular Matter / Contact Dynamics Part II

DY 12.3: Talk

Monday, March 16, 2015, 16:00–16:15, BH-N 128

Flow and clogging of anisometric granular matter in a hopper — •Sandra Wegner¹, Tamás Börzsönyi², Balázs Szabó², and Ralf Stannarius¹ — ¹Otto-von-Guericke-University, Magdeburg, Germany — ²Department of Complex Fluids, Wigner RCP SZFI, Budapest, Hungary

Granular matter is processed and stored in many branches of industry. This storage is often done in silos or hoppers. When the granular material is flowing out of a hopper, jamming is a frequent problem. We address this phenomenon by means of a three-dimensional experimental investigation of the jammed state in cylindrical and conical hoppers. We detect the jamming of differently shaped particles with X-ray computed tomography. With the complete three-dimensional information of grain positions and orientations, packing fractions and orientational ordering of the systems can be calculated and compared. We find differences for grains of different shapes and surface properties.