Berlin 2005 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 34: Poster

DY 34.59: Poster

Montag, 7. März 2005, 15:30–18:00, Poster TU D

Simulation of Peloids — •Martin Hecht¹, Jens Harting¹, Thomas Ihle² und Hans J. Herrmann¹ — ¹ICP, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany — ²North Dakota State University, Department of Physics, Box 5566, Fargo, ND 58105-5566

We are investigating properties of dense suspensions and sediments of small spherical clay particles by means of a combined molecular dynamics (MD) and Stochastic Rotation Dynamics (SRD) simulation. We include electrostatic and van der Waals interaction between the colloid particles, as well as Brownian motion and hydrodynamic interactions which are calculated in the SRD-part.

We present the simulation technique and first results. We have measured velocity distributions, diffusion coefficients, sedimentation velocity, spacial correlation functions and we have explored the phase diagram depending on the parameters of the potentials and volume fraction.