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    Diffusion of Finite-Size Particles in Confined Geometries

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    Type
    Article
    Authors
    Bruna, Maria
    Chapman, S. Jonathan
    KAUST Grant Number
    KUK-C1-013-04
    Date
    2013-05-10
    Online Publication Date
    2013-05-10
    Print Publication Date
    2014-04
    Permanent link to this record
    http://hdl.handle.net/10754/597712
    
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    Abstract
    The diffusion of finite-size hard-core interacting particles in two- or three-dimensional confined domains is considered in the limit that the confinement dimensions become comparable to the particle's dimensions. The result is a nonlinear diffusion equation for the one-particle probability density function, with an overall collective diffusion that depends on both the excluded-volume and the narrow confinement. By including both these effects, the equation is able to interpolate between severe confinement (for example, single-file diffusion) and unconfined diffusion. Numerical solutions of both the effective nonlinear diffusion equation and the stochastic particle system are presented and compared. As an application, the case of diffusion under a ratchet potential is considered, and the change in transport properties due to excluded-volume and confinement effects is examined. © 2013 Society for Mathematical Biology.
    Citation
    Bruna M, Chapman SJ (2013) Diffusion of Finite-Size Particles in Confined Geometries. Bull Math Biol 76: 947–982. Available: http://dx.doi.org/10.1007/s11538-013-9847-0.
    Sponsors
    This publication was based on work supported in part by Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST). MB acknowledges financial support from EPSRC. We are grateful to the organizers of the workshop "Stochastic Modelling of Reaction-Diffusion Processes in Biology," which has led to this Special Issue.
    Publisher
    Springer Nature
    Journal
    Bulletin of Mathematical Biology
    DOI
    10.1007/s11538-013-9847-0
    PubMed ID
    23660951
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11538-013-9847-0
    Scopus Count
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