Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.18: Poster

Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C

Universal critical behaviour in wet granular matter — Axel Fingerle, Klaus Roeller, Kai Huang, and •Stephan Herminghaus — MPI für Dynamik und Selbstorganisation, Göttingen

Wet granular matter is meanwhile established as a versatile model system for a large class of phenomena far from thermal equilibrium. We have studied phase transitions in vertically agitated piles of wet glass beads by experiment, simulation, and analytical theory. The full phase diagram is obtained, in mutual agreement of all three approaches. Quite remarkably, we find that details of the capillary force characteristics are irrelevant for most of the observed features. The only relevant parameters are the capillary force at contact and the total energy which is necessary to rupture a capillary bridge.