Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

BP: Fachverband Biologische Physik

BP 12: Active Matter II (joint session BP/CPP/DY)

BP 12.8: Vortrag

Dienstag, 17. März 2020, 12:00–12:15, HÜL 386

The effect of hydrodynamic interactions on self-propulsion of multiple swimmers — •Sebastian Ziegler¹, Maxime Hubert¹, Thomas Scheel², Jens Harting², and Ana-Sunčana Smith^{1, 3} — ¹PULS Group, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany — ²Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungszentrum Jülich, Germany — ³Division of Physical Chemistry, Ruder Bošković Institute Zagreb, Croatia

A common theoretical approach to model systems of microswimmers is to prescribe the swimming stroke of each individual. If the system consists of more than one device, such models, however, underestimate the impact of one swimmer's stroke on the stroke of all others, reducing the problem of hydrodynamic interactions to a purely geometric one. Furthermore, a number of experimental systems are associated with imposing the forces driving each of the devices. This situation is, from a theoretical point of view, significantly more demanding and has not been investigated so far for multiple swimmers. This issue is addressed in this presentation where we employ a recently developed perturbative calculation and numerical modeling to study the effects of nearby swimmers on the stroke, swimming speed and direction. Notably, we find that for two swimmers, a significant fraction of the parameter space results in both swimmers experiencing a boost from one another. We identify the key characteristics that yield this effect.