Dresden 2009 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 28: Pattern formation in colloidal and granular systems II

DY 28.11: Vortrag

Freitag, 27. März 2009, 13:00–13:15, HÜL 386

Statics and dynamics of a continuous Asakura-Oosawa model near the critical point — •Peter Virnau¹, Jochen Zausch¹, Jürgen Horbach², and Kurt Binder¹ — ¹Institut für Physik, Johannes Gutenberg-Universität Mainz — ²DLR Köln

We propose a continuous variant of the Asakura-Oosawa model which allows us to study dynamics, too. The phase behaviour of the system is determined with grandcanonical Monte Carlo simulations and found to be in good agreement with the original hardcore model. Dynamical quantities near the critical point are investigated with Molecular Dynamics simulations. While the self-diffusion of polymers increases slightly when the critical point is approached, the self-diffusion of colloids decreases. Critical slowing down of interdiffusion is observed, which is qualitatively similar to the behavior of a symmetric binary Lennard-Jones mixture near criticality.