Fluid-fluid phase separation in hard spheres with a bimodal size distribution

被引：30

作者：

Warren, PB ^{[1
]}

机构：

[1] Unilever Res Port Sunlight Lab, Wirral L63 3JW, Merseyside, England

来源：

EUROPHYSICS LETTERS | 1999年 / 46卷 / 03期

关键词：

D O I：

10.1209/epl/i1999-00259-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effect of polydispersity on the phase behaviour of hard spheres is examined using a moment projection method. It is found that the Boublik-Mansoori-Carnahan-Starling-Leland equation of state shows a spinodal instability for a bimodal distribution if the large spheres are sufficiently polydisperse, and if there is sufficient disparity in mean size between the small and large spheres. The spinodal instability direction points to the appearance of a very dense phase of large spheres.

引用

页码：295 / 300

页数：6

共 25 条

[1] A geometrically-based mean-field theory of polydisperse hard-sphere mixtures [J].

Bartlett, P .

JOURNAL OF CHEMICAL PHYSICS, 1997, 107 (01) :188-196

[2] SPINODAL EQUATION FOR POLYDISPERSE POLYMER-SOLUTIONS [J].

BEERBAUM, S ;

BERGMANN, J ;

KEHLEN, H ;

RATZSCH, MT .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1986, 406 (1830) :63-73

[3] CRITICAL-POINT EQUATIONS FOR POLYDISPERSE POLYMER-SOLUTIONS [J].

BEERBAUM, S ;

BERGMANN, J ;

KEHLEN, H ;

RATZSCH, MT .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1987, 414 (1846) :103-110

[4] PHASE-SEPARATION OF ASYMMETRIC BINARY HARD-SPHERE FLUIDS [J].

BIBEN, T ;

HANSEN, JP .

PHYSICAL REVIEW LETTERS, 1991, 66 (17) :2215-2218

[5] HARD-SPHERE EQUATION OF STATE [J].

BOUBLIK, T .

JOURNAL OF CHEMICAL PHYSICS, 1970, 53 (01) :471-&

[6] RY theory investigation of phase coexistence in hard sphere mixtures [J].

Caccamo, C ;

Pellicane, G .

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1997, 235 (1-2) :149-158

[7] EQUATION OF STATE FOR NONATTRACTING RIGID SPHERES [J].

CARNAHAN, NF ;

STARLING, KE .

JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (02) :635-&

[8]

CUESTA JA, 1998, CONDMAT9807030

[9] Phase behavior and structure of binary hard-sphere mixtures [J].

Dijkstra, M ;

van Roij, R ;

Evans, R .

PHYSICAL REVIEW LETTERS, 1998, 81 (11) :2268-2271

[10] PHASE-DIAGRAMS OF NEARLY HARD-SPHERE BINARY COLLOIDS [J].

DINSMORE, AD ;

YODH, AG ;

PINE, DJ .

PHYSICAL REVIEW E, 1995, 52 (04) :4045-4057

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