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Berlin 2008 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Colloid Dynamics

CPP 32.5: Talk

Thursday, February 28, 2008, 12:15–12:30, C 264

The dynamics of several small rotating dumbbells in a fluid — •Steffen Schreiber and Walter Zimmermann — Lehrstuhl Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany

Dumbbells in a fluid carrying a magnetic moment may be set in rotation by an external rotating magnetic field. The hydrodynamic interaction between two or three rotating dumbbells causes a motion of the centers of mass of the dumbbells, which follow circular trajectories. The period of the circular motion of the centers of mass depends on the rotation frequency of the external magnetic flield. Transitions of three and more hydrodynamically interacting dumbbells to more complex dynamics are explored.

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