Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 53: Posters - Active Matter

DY 53.4: Poster

Donnerstag, 23. März 2017, 17:00–19:30, P1A

Dense Microswimmer Systems in Model Porous Media — •Jonathan Onody — DLR e.V. Köln, Deutschland, AG Prof. Thomas Voigtmann

We model the dynamics of active Brownian particles as model microswimmers in porous media by the mode-coupling theory of the glass transition.

The microswimmers are modeled as hard disks undergoing diffusive motion in both, translational and rotational direction. On top they have a constant velocity in a random direction. The particles are embedded in a porous background which is obtained by introducing a second species of particles that are not allowed to move and thus imitate obstacles for the microswimmers. We extend an approach by V. Krakoviack for passive particles without orientational degrees of freedom. The two-dimensional setting is described within the mode-coupling approach, such that an integro-differential equation for density fluctuations is obtained. The memory-kernel and first numerical results will be presented.