Phase diagrams of polydisperse van der Waals fluids

Details Phase diagrams of polydisperse van der Waals fluids Phase diagrams of polydisperse van der Waals fluids

2000-10-03

arxiv.org/abs/cond-mat/0010046v1

J.Chem.Phys.(Nov. 2000)

Physics

Condensed Matter

Statistical Mechanics

26 pages, 10 figures

Scientific paper

10.1063/1.1316007

The phase behavior of a system composed of spherical particles with a monomodal size distribution is investigated theoretically within the context of the van der Waals approximation for polydisperse fluids. It is shown how the binodals, spinodals, cloud-point and shadow curves as well as all the (polydispersity induced) critical points can be obtained for a variety of interaction potentials. The polydispersity induced modifications of the phase diagram (even for a polydispersity index $I$ as small as $I\approx 1.01$) should be observable in some colloidal dispersions.

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