RELATIONSHIP BETWEEN SHEAR VISCOSITY AND STRUCTURE OF A MODEL COLLOIDAL SUSPENSION

被引：8
|
作者：
Krekelberg, William P. [1 ]
Truskett, Thomas M. [1 ,2 ]
Ganesan, Venkat [1 ,2 ]
机构：
[1] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA
[2] Univ Texas Austin, Inst Theoret Chem, Austin, TX 78712 USA
来源：
CHEMICAL ENGINEERING COMMUNICATIONS | 2010年 / 197卷 / 01期
基金：
美国国家科学基金会;
关键词：
Colloids; Free volume; Shear viscosity; Structural order; UNIVERSAL SCALING LAW; FREE-VOLUME; SELF-DIFFUSIVITY; ENTROPY; TRANSPORT; DYNAMICS; LIQUIDS;
D O I：
10.1080/00986440903070718
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
We use molecular dynamics simulations to investigate whether two different structural quantities, free volume per particle and a metric for local translational order, can be related to the shear rate-dependent viscosity of a model colloidal fluid. Our results suggest that while the characteristic auto correlation time of the free volumes (a dynamic quantity) qualitatively tracks the shear viscosity of the fluid, the shear rate-dependent average free volume (a static quantity) does not. On the other hand, the translational order metric does appear to be strongly correlated to the shear viscosity over a wide range of conditions.
引用
收藏
页码：63 / 75
页数：13
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