Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: POSTERS Micro- and Nanofluidics

CPP 38.15: Poster

Donnerstag, 26. März 2009, 17:00–19:30, P3

Mesoscopic dynamics of active media — •Arthur V. Straube and Philipp Thomas — Department of Theoretical Physics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We present a mesoscopic model describing nonequilibrium active media. We follow the ideas of the method of stochastic rotation dynamics and introduce a coarse-grained active field, which is modeled by discrete chemical particles coupled to the solvent. To validate our approach, we first look at the concentration dependence of the diffusion coefficient of passive chemical particles. Next we introduce birth and death rules and focus on population dynamics. Finally, we address the full problem of nonuniform active states produced by a source of the chemical field. The results are compared with the exact solution obtained within the continuum theory. We outline possible chemical and biological applications of the proposed approach.