Instituto de Energías Renovables, Universidad Nacional Autónoma de México (UNAM), Temixco, Morelos 62580, Mexico.
J Chem Phys. 2013 Apr 28;138(16):161104. doi: 10.1063/1.4803097.
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.
重新研究了高度不对称添加剂硬球二元流体混合物的离析问题。本文比较了先前使用截断的维里展开式得出的三个有限尺寸比的结果与在其中一个组分由点粒子组成的极端情况下用相同方法得到的结果。由于已知后一种系统不存在流体-流体分相，因此在所有情况下，在截断级数中出现的临界常数的行为相似性虽然不能确定，但可能对在不同尺寸的二元添加剂硬球混合物中是否存在真正的分相流体-流体转变产生严重怀疑。
