Dresden 2009 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: POSTERS Micro- and Nanofluidics

CPP 38.4: Poster

Thursday, March 26, 2009, 17:00–19:30, P3

Hydrodynamically induced attraction and repulsion of rotated dumbbells — •Steffen Schreiber and Walter Zimmermann — Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany

Two asymmetric and hydrodynamically interacting dumbbells are rotated in a solvent. We show that different shapes of the two dumbbells break the symmetry with respect to a time translation by half a rotational period which causes either a hydrodynamically induced attraction or repulsion between them, depending on the specific shapes. We present phase diagrams of this novel dynamical effect and a reduced model for a qualitative explanation.