Finite element calculations of fluid menisci and thin-films in a model porous media

Joseph A.N. Zasadzinski, J. B. Sweeney, H. T. Davis, L. E. Scriven

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Abstract

Finite element solutions of the augmented Young-Laplace (AYL) equation are given for a number of axisymmetric menisci that correspond to idealized solid-solid contacts in a model porous medium. The influence of the disjoining pressure on the saturation of a nonpolar wetting liquid is significant for porous media composed of particles with diameters of less than 100 μm; low interfacial tensions also cause more wetting liquid to be trapped in thin-films. A method of predicting equilibrium wetting fluid saturation in a porous medium characterized only by the porosity, a characteristic length scale, the interfacial tension between the two fluids, and the Hamaker constant of the solid-liquid-fluid system is proposed.

Original languageEnglish (US)
Pages (from-to)108-116
Number of pages9
JournalJournal of Colloid And Interface Science
Volume119
Issue number1
DOIs
StatePublished - Sep 1987

Bibliographical note

Funding Information:
Financial support was provided by a National Science Foundation Fellowship (to J.A.N.Z.), the University of Minnesota Computer Center, and the Department of Energy. We also acknowledge helpful discussions with K. Mohanty, G. F. Teletzke, and A. H. Falls.

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