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    Pore-scale simulation of fluid flow and solute dispersion in three-dimensional porous media

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    PhysRevE.90.013032.pdf
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    Type
    Article
    Authors
    Icardi, Matteo cc
    Boccardo, Gianluca
    Marchisio, Daniele L.
    Tosco, Tiziana
    Sethi, Rajandrea
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Date
    2014-07-31
    Permanent link to this record
    http://hdl.handle.net/10754/346732
    
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    Abstract
    In the present work fluid flow and solute transport through porous media are described by solving the governing equations at the pore scale with finite-volume discretization. Instead of solving the simplified Stokes equation (very often employed in this context) the full Navier-Stokes equation is used here. The realistic three-dimensional porous medium is created in this work by packing together, with standard ballistic physics, irregular and polydisperse objects. Emphasis is placed on numerical issues related to mesh generation and spatial discretization, which play an important role in determining the final accuracy of the finite-volume scheme and are often overlooked. The simulations performed are then analyzed in terms of velocity distributions and dispersion rates in a wider range of operating conditions, when compared with other works carried out by solving the Stokes equation. Results show that dispersion within the analyzed porous medium is adequately described by classical power laws obtained by analytic homogenization. Eventually the validity of Fickian diffusion to treat dispersion in porous media is also assessed. © 2014 American Physical Society.
    Citation
    Pore-scale simulation of fluid flow and solute dispersion in three-dimensional porous media 2014, 90 (1) Physical Review E
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review E
    DOI
    10.1103/PhysRevE.90.013032
    PubMed ID
    25122394
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevE.90.013032
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevE.90.013032
    Scopus Count
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    Articles; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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