Regensburg 2019 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 52: Poster: Active Matter, Microswimmer, Microfluidics
DY 52.12: Poster
Donnerstag, 4. April 2019, 15:00–18:00, Poster B2
Passive swimming of deformable particles in shaken fluids — Matthias Laumann1, •Andre Förtsch1, Eva Kanso2, and Walter Zimmermann1 — 1Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany — 2Aerospace and Mechanical Eng., University of Southern California, Los Angeles, California 90089, USA
It was demonstrated recently that deformable, passive and asymmetric particles of different mass density than the fluid exhibits in a shaken fluid a net motion [1] with respect to the fluid. We give an explanation in terms of semi-analytical calculations why passive elastic particles show a net motion in shaken fluids. We also demonstrate that common symmetric particles can display a net motion if the time-dependence of the fluid motion is nonsymmetric with respect to an half-period of fluid oscillation. We further show results from simulations of capsules and provide parameters for which a capsule allows to rise in shaken fluid against gravity. The results may be helpful to assemble artificial microswimmers or may be useful for cell sorting and manipulation in microfluidic devices.