VISCOELASTICITY OF CONCENTRATED DISPERSIONS

被引：23

作者：

CHOW, TS

机构：

[1] Xerox Webster Research Center, Webster, NY 14580, 800 Phillips Road

来源：

PHYSICAL REVIEW E | 1994年 / 50卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.50.1274

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A statistical dynamic theory is presented to describe the effects of relaxation of the microstructure, frequency, and volume fraction (phi) on the complex shear viscosity of concentrated colloidal dispersions. On the basis of a fluid lattice model, the relationship between the memory function and relaxation spectrum is derived, and the limits of shear viscosity at low and high frequencies are determined. In addition to the pair interactions, the many body interactions at higher phi are included in the analysis. We calculate the viscoelastic behavior of disperse systems ranging from dilute, to semidilute, to concentrated dispersions. The theory reveals that the viscoelastic effect is negligible in dilute and semidilute suspensions, but is dominant in concentrated dispersions.

引用

页码：1274 / 1279

页数：6

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