Local mean-field study of capillary condensation in silica aerogels

被引：73

作者：

Detcheverry, F ^{[1
]}

Kierlik, E ^{[1
]}

Rosinberg, ML ^{[1
]}

Tarjus, G ^{[1
]}

机构：

[1] Univ Paris 06, Phys Theor Liquides Lab, F-75252 Paris 05, France

来源：

PHYSICAL REVIEW E | 2003年 / 68卷 / 06期

关键词：

D O I：

10.1103/PhysRevE.68.061504

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We apply local mean-field (i.e., density functional) theory to a lattice model of a fluid in contact with a dilute, disordered gel network. The gel structure is described by a diffusion-limited cluster aggregation model. We focus on the influence of porosity on both the hysteretic and the equilibrium behavior of the fluid as one varies the chemical potential at low temperature. We show that the shape of the hysteresis loop changes from smooth to rectangular as the porosity increases and that this change is associated with disorder-induced out-of-equilibrium phase transitions that differ in adsorption and in desorption. Our results provide insight in the behavior of He-4 in silica aerogels.

引用

页数：12

共 56 条

[1] Domain growth in the presence of quenched disorder [J].