Regensburg 2019 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 38: Microswimmers (joint session DY/CPP)
DY 38.4: Talk
Wednesday, April 3, 2019, 16:15–16:30, H19
Complex dynamic response of magnetocapillary swimmers — •Alexander Sukhov1, Sebastian Ziegler2, Ana-Suncana Smith2, and Jens Harting1,3 — 1Helmholtz Institute Erlangen-Nuernberg for Renewable Energy (IEK-11), Forschungszentrum Juelich GmbH, 90429 Nuernberg, Germany — 2Institute for Theoretical Physics, Friedrich-Alexander University Erlangen-Nuernberg, 91054 Erlangen, Germany — 3Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, NL-5600MB Eindhoven, The Netherlands
Using the lattice Boltzmann method and the Shan-Chen model for multiple fluid components we simulate an interface with several rigid magnetic particles floating on it. The stability of the system is reached when the attractive capillary forces resulting from the weights of the particles are balanced by the repulsive magnetic forces induced by an external static magnetic field applied perpendicularly to the interface. The particles can propel themself at the interface when a smaller oscillating magnetic field of the right frequency is applied in the plane of the interface. We aim at understanding the contributions of inter-particle and hydrodynamic interactions as well as that of the interface to the dynamic response of the swimmer when simulating a single, two and three particles at the interface separately.