Donley, James PNyquist, Rebecca MLiu, Andrea JCummins, Herman ZDurian, Douglas JJohnson, David LStanley, Eugene H2023-05-232023-05-2319952017-10-13Donley, J. P., Nyquist R. M., Liu A. J. (1995). A Model for the Two-Phase Behavior of Fluids in Dilute Porous Media. In H. Z. Cummins, D.J. Durian, D.L. Johnson & H.E. Stanley (Eds.), Disordered Materials and Interfaces (pp. 15-20). New York: Cambridge University Press. [doi:10.1557/PROC-407-15]https://repository.upenn.edu/handle/20.500.14332/43321Experiments 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.Posted with permission from Cambridge University Press.Fluid DynamicsPhysical Sciences and MathematicsPhysicsBook Chapter