Dresden 2017 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 9: Soft Particles in Flows II (Focus session, joint DY, CPP)
DY 9.5: Talk
Monday, March 20, 2017, 16:15–16:30, ZEU 160
An iterative solution algorithm for actively and passively swimming elastic capsules — •Horst-Holger Boltz1,2 and Jan Kierfeld2 — 1Institut für nichtlineare Dynamik, Fakultät Physik, Georg-August-Universität Göttingen, Göttingen, Deutschland — 2Fakultät Physik, Technische Universität Dortmund, Dortmund, Deutschland
Soft elastic capsules which are subject a viscous fluid flow undergo shape deformation coupled to their motion. We introduce an iterative solution scheme which couples hydrodynamic boundary integral methods and elastic shape equations to find the stationary axisymmetric shape and the velocity of an elastic capsule moving in a viscous fluid at low Reynolds numbers. We use this approach to systematically study dynamical shape transitions of capsules with Hookean stretching and bending energies and spherical rest shape sedimenting under the influence of gravity or centrifugal forces [Phys. Rev. E 92: 033003 (2015)]. Additionally, we discuss the application to actively swimming (“squirming”) capsules.