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DF: Fachverband Dielektrische Festkörper

DF 18: Glasses II (Joint Session of DY, DF, CPP)

DF 18.6: Vortrag

Donnerstag, 25. März 2010, 11:00–11:15, H38

Brownian dynamics simulation of extensional shear flow in dense colloidal hard-sphere systems — •Olaf Herbst¹ and Thomas Voigtmann^1,2 — ¹Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany — ²Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany

Using a novel algorithm based on on event-driven MD simulations adapted for Brownian dynamics, we examine an extensional flow of colloidal particles with periodic boundary conditions. We study the slow dynamics of dense hard-sphere systems when shear rates are high enough to interfere with the slow (alpha) relaxation time. Characteristic features such as the mean-square displacement as a function of time will be discussed for a variety of system parameters.