arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1207.2986cond-mat.soft
收藏

无序多孔介质中的一维硬杆流体:标度粒子理论

One-dimensional hard rod fluid in a disordered porous medium: scaled particle theory

M. Holovko, T. Patsahan, W. Dong

摘要:

本文应用标度粒子理论描述了无序多孔介质中一维硬杆流体的热力学性质。为此,我们扩展了以前开发的SPT 2方法。本文给出了硬棒和重叠硬棒矩阵中硬棒流体的化学势和压力的解析表达式。提出了一系列新的SPT2近似。结果表明,除了已知的几何孔隙度和比探针粒子孔隙度外,还应考虑一种新的孔隙度,即由流体粒子在多孔介质中的最大填充率定义的孔隙度。巨正则蒙特卡罗模拟进行验证的SPT 2方法与新的近似相结合的准确性。据观察,在这项研究中提出的理论描述基本上提高了流体密度的最高值的结果。

英文摘要:

The scaled particle theory is applied to a description of thermodynamic properties of one-dimensional hard rod fluid in disordered porous media. To this end, we extended the SPT2 approach, which had been developed previously. Analytical expressions are obtained for the chemical potential and pressure of a hard-rod fluid in hard rod and overlapping hard rod matrices. A series of new approximations for SPT2 are proposed. It is shown that apart from two well known porosities such as geometrical porosity and specific probe particle porosity, a new type of porosity defined by the maximum value of packing fraction of fluid particles in porous medium should be taken into account. The grand canonical Monte-Carlo simulations are performed to verify the accuracy of the SPT2 approach in combination with the new approximations. It is observed that the theoretical description proposed in this study essentially improves the results up to the highest values of fluid densities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑