Energy landscapes and the non-Newtonian viscosity of liquids and glasses

被引：84

作者：

Lacks, DJ ^{[1
]}

机构：

[1] Tulane Univ, Dept Chem Engn, New Orleans, LA 70118 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.87.225502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An inherent structure analysis of viscosity is developed based on results of nonequilibrium molecular dynamics simulations. The viscosity is separated into a "structural" contribution associated with the energy minima that the system visits, and a "vibrational" contribution associated with displacements within the energy minima. The structural contribution is shear thinning due to strain-activated relaxations caused by the disappearance of high-stress energy minima, while the vibrational contribution is Newtonian.

引用

页码：225502 / 225502

页数：4

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