Communication: Virial coefficients and demixing in highly asymmetric binary additive hard-sphere mixtures
Communication: Virial coefficients and demixing in highly asymmetric binary additive hard-sphere mixtures
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DOI：
10.1063/1.4803097
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发表时间：
2013-04-28
影响因子：
4.4
通讯作者：
Santos, Andres
中科院分区：
文献类型：
--
作者：
Lopez de Haro, Mariano;Tejero, Carlos F.;Santos, Andres
在高度不对称的添加剂硬球的二元流体混合物中的分层问题被重新审视。一个比较之前使用截断维里展开的三个有限的尺寸比与那些得到相同的方法在极端的情况下，其中一个组成部分由点粒子的结果之间的比较。由于后者的系统是已知的，不表现出流体-流体隔离，在所有情况下，在截断系列中出现的临界常数的行为观察到的相似性，而不是决定性的，可能会严重怀疑的实际存在的分层流体-流体过渡的添加剂硬球混合物的尺寸的二元混合物。(C)2013 AIP Publishing LLC.
The problem of demixing in a binary fluid mixture of highly asymmetric additive hard spheres is revisited. A comparison is presented between the results derived previously using truncated virial expansions for three finite size ratios with those that one obtains with the same approach in the extreme case in which one of the components consists of point particles. Since this latter system is known not to exhibit fluid-fluid segregation, the similarity observed for the behavior of the critical constants arising in the truncated series in all instances, while not being conclusive, may cast serious doubts as to the actual existence of a demixing fluid-fluid transition in disparate-sized binary additive hard-sphere mixtures. (C) 2013 AIP Publishing LLC.