Stick boundary conditions and rotational velocity auto-correlation functions for colloidal particles in a coarse-grained representation of the solvent

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Stick boundary conditions and rotational velocity auto-correlation functions for colloidal particles in a coarse-grained representation of the solvent

Journal Article (2005)

Author(s)

J. T. Padding (University of Cambridge)

A. Wysocki (Universität Düsseldorf)

H. Löwen (Universität Düsseldorf)

A. A. Louis (University of Cambridge)

Affiliation

External organisation

DOI related publication

https://doi.org/10.1088/0953-8984/17/45/027 Final published version

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https://resolver.tudelft.nl/uuid:dbe32053-e6c8-4e60-b562-edf971dcf0ab

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Publication Year

2005

Language

English

Affiliation

External organisation

Issue number

45

Volume number

17

Pages (from-to)

S3393-S3399

Downloads counter

29

Abstract

We show how to implement stick boundary conditions for a spherical colloid in a solvent that is coarse-grained by the method of stochastic rotation dynamics. This allows us to measure colloidal rotational velocity auto-correlation functions by direct computer simulation. We find quantitative agreement with Enskog theory for short times and with hydrodynamic mode-coupling theory for longer times. For aqueous colloidal suspensions, the Enskog contribution to the rotational friction is larger than the hydrodynamic one when the colloidal radius drops below 35 nm.