Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 57: Poster - Diffusion

DY 57.14: Poster

Donnerstag, 19. März 2015, 16:00–18:00, Poster A

Active microrheology of dense microswimmer suspensions — •Alexander Liluashvili and Thomas Voigtmann — DLR, Köln, Deutschland

The dynamics of self-propelled particles like microswimmers in dense environments are studied using the mode coupling theory of the glass transition. The theory is developed to investigate the glassy dynamics of active suspensions out-of-equilibrium, violating the fluctuation-dissipation-theorem relations.

As a starting point of mathematical calculations the Mori-Zwanzig equations with orientational degrees of freedom in two dimensions are used. The final equations for the density two-point function and the friction coefficient in the time domain are solved numerically in a schematic model including the orientational degrees of freedom, but neglecting the spatial fluctuations.