Berlin 2008 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: DRG-DPG SYMPOSIUM Rheology II

CPP 2.6: Vortrag

Montag, 25. Februar 2008, 16:00–16:15, C 130

Shear-induced structures and viscoelastic effects in ferrofluids from nonequilibrium simulations — •Patrick Ilg — ETH Zürich, Polymer Physics, 8093 Zürich, Switzerland

Ferrofluids – suspensions of nano-sized magnetic colloids – have attracted considerable attention due to the possibility of manipulating their flow behaviour by external magnetic fields [1]. From extensive, nonequilibrium Brownian dynamics simulations of realistic model-ferrofluids [2], we obtain the flow- and field-dependence of viscosity coefficients and normal stress differences in planar shear flow. We also observe strong shear-induced structural changes and discuss their relation to rheological properties.

[1] M. Kröger, P. Ilg, S. Hess, J. Phys. Condens. Matter 14 (2003) S1503. [2] P. Ilg, E. Coquelle, S. Hess, J. Phys. Condens. Matter 18 (2006) S2757.