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arXiv 1106.3231cond-mat.soft
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基于二阶积分方程理论的核软化模型流体的微观结构和热力学

Microscopic structure and thermodynamics of a core-softened model fluid from the second-order integral equations theory

O. Pizio, Z. Sokolowska, S. Sokolowski

摘要:

利用由超网链和Percus-Yevick闭包构成的二阶Ornstein-Zernike积分方程,研究了各向同性三维核软化流体的结构和热力学性质.径向分布函数进行了比较,从单重积分方程和计算机模拟数据。建立了不同近似理论下密度异常区域的界限。结果表明,二阶超网链近似可以用来描述该模型流体的结构和密度异常。此外,我们提出的桥函数的计算结果。

英文摘要:

We have studied the structure and thermodynamic properties of isotropic three-dimensional core-softened fluid by using the second-order Ornstein-Zernike integral equations completed by the hypernetted chain and Percus-Yevick closures. The radial distribution functions are compared with those from singlet integral equations and with computer simulation data. The limits of the region of density anomaly resulting from different approximate theories are established. The obtained results show that the second-order hypernetted chain approximation can be used to describe both the structure and the density anomaly of this model fluid. Moreover, we present the results of calculations of the bridge functions.

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。

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