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DY: Fachverband Dynamik und Statistische Physik

DY 22: Granular matter / contact dynamics I

DY 22.5: Talk

Wednesday, March 28, 2007, 16:45–17:00, H2

Fluidization of granular materials wetting by liquid helium — •Kai Huang, Masoud Sohaili, and Stephan Herminghaus — Max-Planck-Institut für Dynamik und Selbstorganisation, Bunsenstr. 10, 37073 Göttingen, Germany

Fluidization of granular media wetting by liquid helium in normal and super-fluid states under vertical vibrations is studied experimentally. The critical acceleration of fluidization is found to depend strongly on the amount of liquid helium condensed on the particles. By comparison of results from normal fluid and superfluid wetting, we explore the effect of viscosity on the dynamics of wet granular materials.