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Vapour-to-Liquid Nucleation in Associating Lennard-Jones Fluids with Multiple Association Sites |
| FU Dong;LIAO Tao |
| School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003 |
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| Cite this article: |
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FU Dong, LIAO Tao 2007 Chin. Phys. Lett. 24 2804-2807 |
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Abstract 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.
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| Keywords:
31.15.Ew
64.60.Qb
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Received: 08 May 2007
Published: 20 September 2007
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