Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 3: Granular Matter

DY 3.8: Vortrag

Montag, 7. März 2016, 11:45–12:00, H46

Hopper flow of shape-anisotropic grains — •Ahmed Ashour and Ralf Stannarius — Otto-von-Guericke-Universität Magdeburg, Institut für Experimentelle Physik

Granular materials have unusual and sometimes counterintuitive physical properties. For this reason, despite the fact that they have been involved in pharmaceutical, industrial, and agricultural applications since decades, centuries, and even millennia, they were and still are the subject of intense scientific research. One of the important problems in processing such materials is silo outlet, which has been studied with spherical grains in numerous publications before. We study experimentally the clogging of elongated granular materials during discharge from a flat bottom silo when the orifice size is not much bigger than the grain size. We check if there exists a critical radius of the orifice at which there is no clogging but continuous flow. The change in the flow velocity of the particles from the silo with changing radius of the orifice is studied, and we check the validity of Beverloo's equation for different geometric parameters