Molecular chaos, pair correlations, and shear-induced ordering of hard spheres

被引：33

作者：

Lutsko, JF

机构：

[1] ESADG, Department of Chemical Engineering, Katholieke Universiteit Leuven, Heverlee, B-3001

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.77.2225

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of molecular dynamics simulations that show that the shear-induced ordering of hard spheres is preceded by the apparent decrease to zero (in certain directions) of the anisotropic pair-distribution function (PDE) at contact. This precursor to the ordering is explained on the basis of a careful interpretation of the meaning of ''molecular chaos'' in hard-sphere systems. An ansatz is proposed to model the nonequilibrium PDF at finite separations and is shown to compare well with simulations.

引用

收藏

页码：2225 / 2228

页数：4

相关论文

共 10 条

[1] HARD-SPHERE DYNAMICS AND BINARY-COLLISION OPERATORS [J].

ERNST, MH ;

DORFMAN, JR ;

HOEGY, WR ;

VANLEEUW.JM .

PHYSICA, 1969, 45 (01) :127-&

[2] SHEAR VISCOSITY OF THE HARD-SPHERE FLUID VIA NONEQUILIBRIUM MOLECULAR-DYNAMICS [J].

ERPENBECK, JJ .

PHYSICAL REVIEW LETTERS, 1984, 52 (15) :1333-1335

[3] NON-EQUILIBRIUM MOLECULAR-DYNAMICS CALCULATIONS OF THE SHEAR VISCOSITY OF HARD-SPHERES [J].

ERPENBECK, JJ .

PHYSICA A, 1983, 118 (1-3) :144-156

[4]

HANLEY H, 1983, NONLINEAR FLUID DYNA

[5] MAXIMIZATION OF ENTROPY, KINETIC-EQUATIONS, AND IRREVERSIBLE THERMODYNAMICS [J].

KARKHECK, J ;

STELL, G .

PHYSICAL REVIEW A, 1982, 25 (06) :3302-3327

[6] STABILITY ANALYSIS OF A DENSE HARD-SPHERE FLUID SUBJECTED TO LARGE SHEAR SHEAR-INDUCED ORDERING [J].

KIRKPATRICK, TR ;

NIEUWOUDT, JC .

PHYSICAL REVIEW LETTERS, 1986, 56 (09) :885-888

[7] COMPUTER STUDY OF TRANSPORT PROCESSES UNDER EXTREME CONDITIONS [J].

LEES, AW ;

EDWARDS, SF .

JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1972, 5 (15) :1921-&

[8] FLUCTUATIONS AND DISSIPATION IN A FLUID UNDER SHEAR - LINEAR DYNAMICS [J].

LUTSKO, JF ;

DUFTY, JW ;

DAS, SP .

PHYSICAL REVIEW A, 1989, 39 (03) :1311-1324

[9] POSSIBLE INSTABILITY FOR SHEAR-INDUCED ORDER-DISORDER TRANSITION [J].

LUTSKO, JF ;

DUFTY, JW .

PHYSICAL REVIEW LETTERS, 1986, 57 (22) :2775-2778

[10]

Mareschal M., 1990, MICROSCOPIC SIMULATI