arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.4920cond-mat.stat-mechcond-mat.softphysics.chem-ph
收藏

维里系数与硬磁盘和硬球的密堆积的关系

On the relation between virial coefficients and the close-packing of hard disks and hard spheres

Miguel Ángel G. Maestre, Andrés Santos, Miguel Robles, Mariano López de Haro

摘要:

讨论了已知维里系数是否足以确定硬球流体状态方程发散的填充分数$η_\infty$的问题。结果表明,由维里系数构造的压缩因子的直接Padé逼近所得到的信息是不确定的。提出了一种替代方法,它利用相同的维里系数和状态方程的形式,其中明确给出的包装分数作为压力的函数。硬盘和硬球流体,它可以直接容纳较高的维里系数时,这种方法的结果支持的猜想,即$η_\infty$等于对应于一个有序的晶体结构的最大包装分数。

英文摘要:

The question of whether the known virial coefficients are enough to determine the packing fraction $η_\infty$ at which the fluid equation of state of a hard-sphere fluid diverges is addressed. It is found that the information derived from the direct Padé approximants to the compressibility factor constructed with the virial coefficients is inconclusive. An alternative approach is proposed which makes use of the same virial coefficients and of the equation of state in a form where the packing fraction is explicitly given as a function of the pressure. The results of this approach both for hard-disk and hard-sphere fluids, which can straightforwardly accommodate higher virial coefficients when available, lends support to the conjecture that $η_\infty$ is equal to the maximum packing fraction corresponding to an ordered crystalline structure.

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。

↑