On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description

M. Holovko; M. Ya. Korvatska

doi:10.5488/cmp.28.23605

journal article Open Access Jun 25, 2025

On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description

M. Holovko

M. Ya. Korvatska

Condensed Matter Physics Vol. 28 No. 2 pp. 23605 · Yukhnovskii Institute for Condensed Matter Physics

View at Publisher Save 10.5488/cmp.28.23605

Abstract

We proposed a new extended version of Enskog theory for the description of the self-diffusion coefficient of a colloidal hard-sphere fluid adsorbed in a matrix of disordered hard-sphere obstacles. In a considered approach instead of contact values of the fluid-fluid and fluid-matrix pair distribution functions, we introduced by input the new functions that include the dependence on the fraction of the volume free from matrix particles and from fluid particles trapped by matrix particles. It is shown that the introduction of this free volume fraction by the Fermi-like distribution leads to the best agreement between theoretical predictions and computer simulation results [Chang R., Jagannathan K., Yethiraj A., Phys. Rev. E, 2004, 69, 051101].

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Published: Jun 25, 2025
Vol/Issue: 28(2)
Pages: 23605
License: View

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Cite This Article

M. Holovko, M. Ya. Korvatska (2025). On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description. Condensed Matter Physics, 28(2), 23605. https://doi.org/10.5488/cmp.28.23605

On the diffusion of hard sphere fluids in disordered porous media: New extended Enskog theory description

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