Hydrodynamics of confined colloidal fluids in two dimensions

J. Sané, J.T. Padding, A.A. Louis

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    We apply a hybrid molecular dynamics and mesoscopic simulation technique to study the dynamics of two-dimensional colloidal disks in confined geometries. We calculate the velocity autocorrelation functions and observe the predicted t-1 long-time hydrodynamic tail that characterizes unconfined fluids, as well as more complex oscillating behavior and negative tails for strongly confined geometries. Because the t-1 tail of the velocity autocorrelation function is cut off for longer times in finite systems, the related diffusion coefficient does not diverge but instead depends logarithmically on the overall size of the system. The Langevin equation gives a poor approximation to the velocity autocorrelation function at both short and long times. © 2009 The American Physical Society.
    Original languageEnglish
    Article number051402
    Pages (from-to)051402-1/10
    Number of pages10
    JournalPhysical Review E
    Volume79
    Issue number5
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Autocorrelation Function
    autocorrelation
    Tail
    Hydrodynamics
    Two Dimensions
    hydrodynamics
    Fluid
    fluids
    Langevin Equation
    geometry
    Diverge
    Molecular Dynamics
    Diffusion Coefficient
    cut-off
    diffusion coefficient
    molecular dynamics
    Calculate
    Approximation
    approximation
    Simulation

    Cite this

    Sané, J., Padding, J. T., & Louis, A. A. (2009). Hydrodynamics of confined colloidal fluids in two dimensions. Physical Review E, 79(5), 051402-1/10. [051402]. https://doi.org/10.1103/PhysRevE.79.051402
    Sané, J. ; Padding, J.T. ; Louis, A.A. / Hydrodynamics of confined colloidal fluids in two dimensions. In: Physical Review E. 2009 ; Vol. 79, No. 5. pp. 051402-1/10.
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    Sané, J, Padding, JT & Louis, AA 2009, 'Hydrodynamics of confined colloidal fluids in two dimensions', Physical Review E, vol. 79, no. 5, 051402, pp. 051402-1/10. https://doi.org/10.1103/PhysRevE.79.051402

    Hydrodynamics of confined colloidal fluids in two dimensions. / Sané, J.; Padding, J.T.; Louis, A.A.

    In: Physical Review E, Vol. 79, No. 5, 051402, 2009, p. 051402-1/10.

    Research output: Contribution to journalArticleAcademicpeer-review

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