Berlin 2012 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 29: Posters II
DY 29.46: Poster
Donnerstag, 29. März 2012, 17:00–19:00, Poster A
Anomalous diffusion of a fluid domain suspended in a wet granular gas — •Mitja Kleider1,2, Klaus Röller1, and Jürgen Vollmer1,2 — 1Max-Planck-Institut für Dynamik und Selbstorganisation, Göttingen — 2Georg-August-Universität Göttingen
By event-driven molecular dynamics simulations we study the evolution of a dense fluid phase in a fluid-gas coexistence regime of wet granular matter where external driving balances the dissipation in the granular fluid. In a shallow two-dimensional system the fluid phase can form a domain of a well-defined width, a granular droplet immersed in the granular gas phase. Surprisingly, its centre-of-mass position exhibits Brownian motion with anomalous diffusion: the mean square displacement shows super-diffusive behaviour. The origin of the Brownian motion and the super-diffusive behaviour will be discussed.