Diffusion of spherical particles in microcavities

A. Imperio, J.T. Padding, W.J. Briels

    Research output: Contribution to journalArticleAcademicpeer-review

    11 Citations (Scopus)

    Abstract

    The diffusive motion of a colloidal particle trapped inside a small cavity filled with fluid is reduced by hydrodynamic interactions with the confining walls. In this work, we study these wall effects on a spherical particle entrapped in a closed cylinder. We calculate the diffusion coefficient along the radial, azimuthal, and axial direction for different particle positions. At all locations the diffusion is smaller than in a bulk fluid and it becomes anisotropic near the container's walls. We present a simple model which reasonably well describes the simulation results for the given dimensions of the cylinder, which are taken from the recent experimental work.
    Original languageEnglish
    Article number154904
    Number of pages9
    JournalJournal of chemical physics
    Volume134
    Issue number15
    DOIs
    Publication statusPublished - 2011

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