Dresden 2011 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 1: Statistical Physics in Biological Systems I (joint DY, BP)

BP 1.7: Vortrag

Montag, 14. März 2011, 12:15–12:30, ZEU 250

Modelling the dynamics of micro-swimmers — •Eva Baresel and Rudolf Friedrich — Insitute for Theoretical Physics, University of Münster, Wilhelm-Klemm-Str. 9, D-48149 Münster

The motion of self-propelled flagellated bacteria consists of two different modalities: "running" if all flagella rotate counter-clockwise or "tumbling" if at least one flagellum rotates clockwise. As a model for these bacterial motors we consider the dynamics of an ensemble of swimming objects which are composed of two rigidly connected point vortices. The single objects are able to show translation or rotation depending on the circulations of the single point vortices. We discuss the collective behaviour for several of these objects and the resulting velocity fields by means of numerical calculations.