Multi-particle collision dynamics simulations of sedimenting colloidal dispersions in confinement

Adam Wysocki; C. Patrick Royall; Roland G. Winkler; Gerhard Gompper; Hajime Tanaka; Alfons van Blaaderen; Hartmut Löwen

doi:10.1039/B901640F

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Multi-particle collision dynamics simulations of sedimenting colloidal dispersions in confinement

Adam Wysocki , C. Patrick Royall , Roland G. Winkler , Gerhard Gompper , Hajime Tanaka , Alfons van Blaaderen and Hartmut Löwen

Faraday Discuss., 2010, 144, 245-252

DOI: 10.1039/B901640F
Received 26 Jan 2009, Accepted 06 Mar 2009
First published on the web 02 Sep 2009
This article is part of the collection: Multiscale Modelling of Soft Matter

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Abstract
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The sedimentation of an initially inhomogeneous distribution of hard-sphere colloids confined in a slit is simulated using the multi-particle collision dynamics scheme which takes into account hydrodynamic interactions mediated by the solvent. This system is an example for soft matter driven out of equilibrium where various length and time scales are involved. The initial laterally homogeneous density profiles exhibit a hydrodynamic Rayleigh–Taylor-like instability. Solvent backflow effects lead to an intricate non-linear behaviour which is analyzed via the solvent flow field and the colloidal velocity correlation function. Our simulation data are in good agreement with real-space microscopy experiments.

Articles By

Adam Wysocki
C. Patrick Royall
Roland G. Winkler
Gerhard Gompper
Hajime Tanaka
Alfons van Blaaderen
Hartmut Löwen

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Faraday Discussions

Multi-particle collision dynamics simulations of sedimenting colloidal dispersions in confinement

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