Dresden 2009 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 28: Pattern formation in colloidal and granular systems II
DY 28.11: Talk
Friday, March 27, 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.