Vapour-to-Liquid Nucleation in Associating Lennard-Jones Fluids with Multiple Association Sites

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2007,（10）
• 页码范围: 2804-2807
• 页数: 4页
• 语种: 英文

摘要

The excess Helmholtz free energy functional for associating Lennard-Jones (LJ) fluid is formulated in terms of a weighted density approximation for short-ranged interactions and a Weeks Chandler-Andersen approximation for long-range attraction. Within the framework of density functional theory, phase equilibria, vapour-liquid surface tension and vapour-liquid nucleation properties including the density profile, work of formation, excess number of particles and critical supersaturation are investigated for associating LJ fluids with different numbers of association sites (M=1,2,3,4) per particle. The influences of association energy and association sites on phase equilibria, surface tension and vapour-liquid nucleation properties are discussed.