Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Granular Matter/ Contact Dynamics

DY 22.7: Vortrag

Mittwoch, 16. März 2011, 15:30–15:45, HÜL 186

Fluidization of wet granulates under hydrodynamic stresses — •Ilenia Battiato and Jürgen Vollmer — Max Planck Institute for Dynamics and Self-Organization, 37073, Göttingen

We investigate the fluidization threshold of three-dimensional wet granulates under hydrodynamic drag exerted by a creeping flow. A continuum model of flow through porous media provides a closed form expression for the average drag force on a single grain. The balance equation for the forces and a force propagation model are then used to investigate the effects of porosity and different packing structures (e.g. Face Centered and Hexagonal Close Packing) on the stability of the pile.