Critical behavior of a fluid in a disordered porous matrix: An Ornstein-Zernike approach.
نویسندگان
چکیده
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 γ-ordering and the mean-spherical approximation suggest that the critical behavior is closely related to that of the random-field Ising model (RFIM).
منابع مشابه
Explicit spatial description of fluid inclusions in porous matrices in terms of an inhomogeneous integral equation.
We study the fluid inclusion of both Lennard-Jones (LJ) particles and particles with competing interaction ranges--short range attractive and long range repulsive (SALR)--in a disordered porous medium constructed as a controlled pore glass in two dimensions. With the aid of a full two-dimensional Ornstein-Zernike approach, complemented by a Replica Ornstein-Zernike integral equation, we explici...
متن کاملStructural properties of a fluid of polymers confined in a porous matrix of star polymers
We have studied the structural properties of a fluid of linear polymer chains under the external field of a disordered porous matrix, represented by a frozen liquid configuration of star polymer particles. To this end, and using a coarse-grained description of both fluid and matrix, we have applied the replica Ornstein-Zernike formalism to this particular case where soft and ultra-soft interpar...
متن کاملInvited Review Phase Transitions and Critical Behaviour of Binary Liquid Mixtures
Compared to the simple one-component case, the phase behaviour of binary liquid mixtures shows an incredibly rich variety of phenomena. In this contribution we restrict ourselves to so-called binary symmetric mixtures, i.e. where like-particle interactions are equal (F11(r)F22(r)), whereas the interactions between unlike ̄uid particles differ from those of likes ones (F11(r) 6 F12(r)). Using b...
متن کاملA three dimensional integral equation approach for fluids under confinement: Argon in zeolites.
In this work, we explore the ability of an inhomogeneous integral equation approach to provide a full three dimensional description of simple fluids under conditions of confinement in porous media. Explicitly, we will consider the case of argon adsorbed into silicalite-1, silicalite-2, and an all-silica analogue of faujasite, with a porous structure composed of linear (and zig-zag in the case o...
متن کاملInclusions of a two dimensional fluid with competing interactions in a disordered, porous matrix.
The behavior of a fluid with competing interaction ranges adsorbed in a controlled pore size disordered matrix is studied by means of grand canonical Monte Carlo simulations in order to analyze the effects of confinement. The disordered matrix model is constructed from a two-dimensional non-additive hard-sphere fluid (which shows close to its demixing critical point large fluctuations in the co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 74 22 شماره
صفحات -
تاریخ انتشار 1995