Translational and rotational friction on a colloidal rod near a wall

J.T. Padding, W.J. Briels

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    We present particulate simulation results for translational and rotational friction components of a shish-kebab model of a colloidal rod with aspect ratio (length over diameter) L/D=10 in the presence of a planar hard wall. Hydrodynamic interactions between rod and wall cause an overall enhancement of the friction tensor components. We find that the friction enhancements to reasonable approximation scale inversely linear with the closest distance d between the rod surface and the wall, for d in the range between D/8 and L. The dependence of the wall-induced friction on the angle ¿ between the long axis of the rod and the normal to the wall is studied and fitted with simple polynomials in cos ¿. © 2010 American Institute of Physics.
    Original languageEnglish
    Article number054511
    Pages (from-to)054511-1/8
    Number of pages8
    JournalJournal of Chemical Physics
    Issue number5
    Publication statusPublished - 2010


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