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

J.T. Padding, A. Wysocki, H. Löwen, A.A. Louis

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    61 Citations (Scopus)

    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. © 2005 IOP Publishing Ltd.
    Original languageEnglish
    Pages (from-to)S3393-S3399
    Number of pages7
    JournalJournal of Physics : Condensed Matter
    Volume17
    Issue number45
    DOIs
    Publication statusPublished - 2005

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