Extension of the effective solid-fluid Steele potential for Mie force fields

Extension of the effective solid-fluid Steele potential for Mie force fields
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米氏力场的有效固液斯蒂尔势的扩展

DOI:
10.1080/00268976.2019.1669836
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发表时间:
2019
期刊:
影响因子:
1.7
通讯作者:
Jiménez-Serratos G
Jiménez-Serratos G
中科院分区:
化学4区
文献类型:
--
作者:
Jiménez-Serratos G

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由于涉及大量的固体-流体对相互作用,在表面存在下的流体系统的分子模拟需要计算上昂贵的计算。将显式实体表示为具有有效势的连续壁可以显着减少计算时间,并允许探索更大的时间和空间尺度。著名的(10-4-3)Steele势就是这样一个解析表达式,它忠实地表示了具有六方晶格对称性的均匀晶体固体的有效固-流相互作用。然而,这个和大多数在文献中发现的有效势已经被开发为流体和固体相互作用完全通过Lennard-Jones势。在这项工作中,我们扩展了斯蒂尔模型,以获得有效的壁面流体势的米氏力场。我们进行分子动力学模拟的粗粒度流体建模通过SAFT力场的方法在显式和隐式表面的存在下,比较两种表示的结构和动力学性质。此外,我们通过巨正则蒙特卡罗模拟研究了乙烷在狭缝状孔隙中的吸附。我们探讨的有效性和改进的模拟性能以及所提出的表达的局限性。
Molecular simulation of fluid systems in the presence of surfaces require computationally expensive calculations due to the large number of solid–fluid pair interactions involved. Representing the explicit solid as a continuous wall with an effective potential can significantly reduce the computational time and allows exploring larger temporal and spatial scales. The well-known (10-4-3) Steele potential is one such analytic expression that faithfully represents the effective solid–fluid interactions for homonuclear crystalline solids with hexagonal lattice symmetry. However, this and most of the effective potentials found in the literature have been developed for fluids and solids interacting exclusively through Lennard-Jones potentials. In this work, we extend the Steele model to obtain the effective wall–fluid potentials for Mie force fields. We perform molecular dynamics simulations of coarse-grained fluids modelled via the SAFT force field approach in the presence of explicit and implicit surfaces to compare structural and dynamic properties in both representations. Also, we study the adsorption of ethane into slit-like pores with explicit and implicit surfaces via grand canonical Monte Carlo simulations. We explore the validity and the improvement in the simulation performance as well as the limitations of the proposed expression.
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发表时间: 2018-09
期刊: The journal of physical chemistry. B
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根据相应状态相关性进行粗粒度分子模拟的力场
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
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通讯作者: E. A. Müller
DOI: --
发表时间: 2013
期刊: Entropy
影响因子: 2.7
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