Dresden 2006 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.110: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Quantum paste: a model granulate wetted by superfluid Helium — •Masoud Sohaili and Stephan Herminghaus — MPI for Dynamics and Self-Organization, Bunsenstr. 10, D-37073 Göttingen, Germany

The dynamic properties of a dry granulate change dramatically upon addition of liquid, due to the formation of capillary bridges between mutually adjacent grains in the pile. The relative contribution of the surface tension and the viscosity of the liquid to this effect is still unclear. We have therefore set up an experiment to observe fluidization of a model granulate which is wetted by liquid Helium. The latter looses its classical viscosity at the superfluid transition temperature of 2.17 K. By comparing its properties above and below this temperature, it is possible to extract the effect of viscosity upon the dynamic properties of the granular pile.