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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.70: Poster

Thursday, February 28, 2008, 16:00–18:00, Poster C

Lattice Gas Simulation of Liesegang Pattern Formation — •Lukas Jahnke — Theoretische Physik, Martin-Luther-Universität, Halle / Saale, Germany

Liesegang patterns are a self-organized, quasi-periodic structuring that occur in diffusion-limited chemical reactions with two components. In recent experiments, where silver nano particles in glass are being generated behind a moving hydrogen front, Liesegang patterns emerge also. Due to the mesoscopic character of these experiments it is not clear whether the mean field approaches are adequate. Alternatively, the microscopic reaction-diffusion process can be modeled by Monte-Carlo simulations in a lattice gas approach. We present simulation results going beyond the mean field approach by studying the role of fluctuations. We show that the fluctuation have a major impact on the results for small concentrations of the reacting particles.