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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Poster: Interfaces and Thin Films (joint session with DECHEMA and VDI)

CPP 9.38: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Non-equilibrium dynamics of a bilayer system of confined colloidal particles in a planar shear flow — •Tarlan A. Vezirov and Sabine H. L. Klapp — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany

We perform computer simulations of a confined bilayer system of charged colloidal particles interacting via a combined softsphere- and Yukawa-potential. The system is driven from equilibrium by a planar shear flow. The model parameters are adjusted according to ludox silica particles, which we have previously studied under equilibrium conditions [1,2]. As a framework for solving the equation of motion, we employ overdamped Brownian dynamics simulations. We investigate the impact of the shear flow and confinement on structure formation and focus on statistical properties such as e.g. translational symmetry orderparameter and pair distribution functions. Furthermore we are interested in the emergence of the zigzag motion observed in experiments [3] and characterized by the spatial oscillations of layers. We hope that our results can be used as predictions for future experimental work.

[1] S. Grandner and S.H.L. Klapp, J. Chem. Phys. 129, 244703 (2008). [2] S. H. L. Klapp, Y. Zeng, D. Qu and R. v. Klitzing, Phys. Rev. Lett. 100, 118303 (2008). [3] D. Derks, Y.L. Wu, A.v. Blaaderen and A. Imhof, Soft Matter 5, 1060 (2009).