A Model for the Two-Phase Behavior of Fluids in Dilute Porous Media
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Physical Sciences and Mathematics
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Experiments show that the coexistence region of a vapor-liquid system or binary liquid mixture is dramatically narrowed when the fluid is confined in a dilute porous medium such as a silica aerogel. We propose a simple model of the gel as a periodic array of cylindrical strands, and study the phase behavior of an Ising system confined in this geometry. Our results suggest that the coexistence region should widen out at lower temperatures, and that the narrowness observed near the critical point may be a fluctuation-induced effect.
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At the time of publication, authors Douglas J. Durian and Andrea J Liu were affiliated with University of California, Los Angeles. Currently, they are faculty members at the Physics Department at the University of Pennsylvania.