Critical behavior of a fluid in a disordered porous matrix: An Ornstein-Zernike approach

Abstract

Using a liquid-state approach based on Ornstein-Zernike equations, we study the behavior of a fluid inside a porous disordered matrix near the liquid-gas critical point.The results obtained within various standard approximation schemes such as lowest-order $\gamma$-ordering and the mean-spherical approximation suggest that the critical behavior is closely related to that of the random-field Ising model (RFIM).

10 pages, revtex, to appear in Physical Review Letters

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