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Pore flow models and their applicability.

M N Sarbolouki

    Ion Exchange and Membranes
    |December 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Pore flow models, despite differences, are equivalent. Newer models use a better viscosity coefficient, confirming empirical validity for tight membranes, though theoretical foundations remain debated.

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    Area of Science:

    • Physical Chemistry
    • Membrane Science
    • Computational Chemistry

    Background:

    • Pore flow models are crucial for understanding transport across membranes.
    • Existing models, like Guerout-Elford-Ferry and Pappenheimer-Ussing, show apparent differences.
    • The applicability of continuum hydrodynamics to tight membranes is questionable.

    Purpose of the Study:

    • To classify and review pore flow models.
    • To demonstrate the equivalence of different pore flow models.
    • To address the theoretical validity of pore size calculations for tight membranes.

    Main Methods:

    • Comparative analysis of pore flow model formulations.
    • Review of fundamental assumptions and applicability criteria.
    • Analysis of molecular dynamics simulations (Levitt's kinetic studies).

    Main Results:

    • All pore flow models are shown to be equivalent.
    • Differences arise from the viscosity coefficient used for water within membranes.
    • Molecular dynamics simulations support empirical validity of pore flow models for tight membranes.

    Conclusions:

    • The empirical validity of pore flow models for tight membranes is supported by simulations.
    • Theoretical foundations for pore flow models in tight membranes remain unsettled.
    • Further investigation is needed to reconcile theoretical and empirical findings.