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Semi-infinite boundary conditions for the simulation of interfaces: The Ar/CO_2(s) model revisited

机译:界面模拟的半无限边界条件:重新研究Ar / CO_2(s)模型

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We propose a method to account for the long tail corrections of dispersive forces in inhomogeneous systems. This method deals separately with the two interfaces that are usually present in a simulation setup, effectively establishing semi-infinite boundary conditions that are appropriate for the study of the interface between two infinite bulk phases. Using the wandering interface method, we calculate surface free energies of vapor-liquid, wall-liquid, and wall-vapor interfaces for a model of Lennard-Jones argon adsorbed on solid carbon dioxide. The results are employed as input to Youngs equation, and the wetting temperature located. This estimate is compared with predictions from the method of effective interface potentials and good agreement is found. Our results show that truncating Ar-Ar interactions at two and a half molecular diameters results in a dramatic decrease of the wetting temperature of about 40.
机译:我们提出了一种解决不均匀系统中色散力的长尾修正的方法。该方法分别处理模拟设置中通常存在的两个界面,从而有效地建立了适合于研究两个无限本体相之间的界面的半无限边界条件。使用漂移界面法,我们计算了Lennard-Jones氩气吸附在固体二氧化碳上的模型的气-液,壁-液和壁-气界面的表面自由能。将结果用作Youngs方程的输入,并确定润湿温度。将该估计值与有效界面电势方法的预测值进行比较,可以得出很好的一致性。我们的结果表明,在两个半分子直径处截断Ar-Ar相互作用会导致大约40的润湿温度急剧下降。

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