Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Poster: Colloids and Complex Liquids

CPP 38.13: Poster

Mittwoch, 16. März 2011, 17:00–19:00, P2

Hydrodynamics of colloidal suspension under external force in a narrow channel in 2D — •Fatemeh Tabatabaei — Institute for Solid State, Research Center Juelich, 52428 Juelich, Germany

Investigating biological or chemical systems which are consist of particles under different degrees of confinement has got great interest recently. In this work we study a suspensions of disc-like particles between two planar walls by means of simulation. The system under influence of sedimentation along the walls as an external force is considered. The settling speed of a colloid in respect to varying geometrical parameters are calculated. By calculation of velocity profile of the fluid particles, the effect of Hydrodynamic interaction due to solvent's flow in the laminar regime is discussed. In the next step the dependency of the sedimentation velocity on the volume fraction of colloidal particles is considered. Here a hybrid simulation scheme which couples a Molecular dynamic simulation method to a multi-particle-collision (MPC) fluid is used. This is a coarse-grained model to describe fluid dynamics.