Regensburg 2016 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 53: Posters - Statistical Physics of Biological Systems
BP 53.9: Poster
Mittwoch, 9. März 2016, 17:00–19:00, Poster C
Micro-swimming with inertia — •Oleg Trosman1,2, Jayant Pande1,2, and Ana-Sunčana Smith1,2,3 — 1PULS group, Department of Physics, Friedrich-Alexander-University of Erlangen-Nuremberg, Germany — 2Cluster of Excellence: Engineering of Advanced Materials, Department of Physics, Friedrich-Alexander-University of Erlangen-Nuremberg, Germany — 3Division of Physical Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
Increased theoretical study in the past few decades has enabled scientists to gain a good understanding of the motion of micro-swimmers, yet this has focused on the world of inertia-free swimming. While this is a good approximation for many micro-swimmers as the Reynolds numbers of their flow are typically negligible, for some micro-swimmers inertia can have observable effects on the motion, such as affecting the swimming gait and the velocity. In this talk we present a theoretical study of a micro-swimmer where inertial effects are taken into account to the lowest non-zero order. For this we employ the popular Golestanian model of the swimmer, with three beads attached in series in a fluid and the motion along the axis of the swimmer. By combining the Oseen-Stokes equations for the coupled motion of distant spheres in a fluid with Newton’s force-mass relations, we obtain a coupled system of second-order differential equations for the sphere positions. Solutions of these equations numerically and analytically allow us to discuss interesting deviations from inertia-less swimming.