Regensburg 2019 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 52: Poster: Active Matter, Microswimmer, Microfluidics

DY 52.13: Poster

Thursday, April 4, 2019, 15:00–18:00, Poster B2

Oscillatory bifurcations in active particle systems — •Andreas Förtsch, Fabian Bergmann, Lisa Rapp, and Walter Zimmermann — Theoretische Physik, Universität Bayreuth, 95440 Bayreuth

We introduce a model with two types of interacting active species A and B. We assume A-A attraction, A-B attraction and B-B repulsion/attraction. The use continuum and Brownian dynamics modelling of the two chemotactically interacting active particles. The continuum model for the two interacting species shows either a stationary or an oscillatory instability of the homogeneous particle distribution. Since the both particle types are conserved the instabilities lead either to a non-oscillatory active phase separation [1] or to an oscillatory type of active phase separation. Above the oscillatory onset of active phase separation, we find in simulations traveling and spatio-temporal dynamics of clusters.

[1] F. Bergmann, L. Rapp, W. Zimmermann, Active phase separation: A universal approach, Phys. Rev. E 98, 020603(R) (2018)