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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.45: Poster

Donnerstag, 29. März 2012, 17:00–19:00, Poster A

Fluidization of wet granulates under hydrodynamic shear — •Christoph Goegelein, Ilenia Battiato, and Juergen Vollmer — Max-Planck-Institut fuer Dynamik und Selbstorganisation, Goettingen

Very recently, the fluidization threshold of wet granular beds under hydrodynamic shear forces were predicted theoretically [1]. This theory describes the flow through a wet granular bed by a continuum model and provides analytical expressions for the averaged drag force on a single particle. Moreover, the theory predicts the stability of the granular bed in dependence of the strength of the capillary and buoyancy forces. These theoretical predictions are tested in the present study by a newly designed flow channel. We will present our first experimental results for the fluidization onset of wet granular beds.

[1] I. Battiato, and J. Vollmer, "Fluidization of wet granulates under hydrodynamic shear", submitted for publication.