Cross-stream migration of asymmetric particles driven by oscillating shear
1 Theoretische Physik I, Universität Bayreuth - 95440 Bayreuth, Germany
2 Biofluid Simulation and Modeling, Universität Bayreuth - 95440 Bayreuth, Germany
Received: 23 December 2016
Accepted: 13 March 2017
We study the dynamics of asymmetric, deformable particles in oscillatory, linear shear flow. By simulating the motion of a dumbbell, a ring-polymer, and a capsule we show that cross-stream migration occurs for asymmetric elastic particles even in linear shear flow if the shear rate varies in time. The migration is generic as it does not depend on the particle dimension. Importantly, the migration velocity and migration direction are robust to variations of the initial particle orientation, making our proposed scheme suitable for sorting particles with asymmetric material properties.
PACS: 47.15.G- – Low-Reynolds-number (creeping) flows / 47.57.ef – Sedimentation and migration / 83.50.-v – Deformation and flow
© EPLA, 2017