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Simple Model of Capillary Condensation in porous media

S. M. Gatica, M. M. Calbi, M. W. Cole

cond-mat.mtrl-sciarXiv:cond-mat/0202382

Abstract

We employ a simple model to describe the phase behavior of 4He and Ar in a hypothetical porous material consisting of a regular array of infinitely long, solid, parallel cylinders. We find that high porosity geometries exhibit two transitions: from vapor to film and from film to capillary condensed liquid. At low porosity, the film is replaced by a ``necking'' configuration, and for a range of intermediate porosity there are three transitions: from vapor to film, from film to necking and from necking to a capillary condensed phase.

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