Outflow and clogging of shape-anisotropic grains in hoppers

ORAL

Abstract

Silos have been in use in human history for millennia, but still today, the discharge of grains from silos is a process with potential risks and imponderabilities. Models and quantitative predictions have been developed almost exclusively for spherical grains shapes. We study the discharge and clogging processes of shape-anisotropic grains in hoppers, and describe the peculiarities of these materials both in their dynamical properties and in the observed clogging structures. An attempt is made to adapt the well-known equations for spherical material to describe anisometric particles.

*Funding by DAAD and MÖB is acknowledged. A. A. acknowledges a scholarship from Future University, Egypt

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Authors

  • Ralf Stannarius

    • Otto von Guericke University, Magdeburg
    • Otto-von-Guericke-Universität, Magdeburg
    • Otto von Guericke University, Magdeburg, Germany

  • Ahmed Ashour

    • Otto von Guericke University, Magdeburg

  • Sandra Wegner

    • Otto von Guericke University, Magdeburg

  • Tamas Börzsönyi

    • Hungarian Academy of Sciences, Wigner Research Centre for Physics