Hydrodynamic and Contact Contributions to Continuous Shear Thickening in Colloidal Suspensions

被引：289

作者：

Lin, Neil Y. C. ^{[1
]}

Guy, Ben M. ^{[2
]}

Hermes, Michiel ^{[2
]}

Ness, Chris ^{[3
]}

Sun, Jin ^{[3
]}

Poon, Wilson C. K. ^{[2
]}

Cohen, Itai ^{[1
]}

机构：

[1] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

[2] Univ Edinburgh, Sch Phys & Astron, SUPA, Edinburgh EH9 3FD, Midlothian, Scotland

[3] Univ Edinburgh, Sch Engn, Edinburgh EH9 3JL, Midlothian, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 22期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

NON-BROWNIAN SUSPENSIONS; CONCENTRATED SUSPENSIONS; RHEOLOGY; DISPERSIONS; MICROSTRUCTURE; DYNAMICS; SPHERES; FLOW; SIMULATION; PARTICLES;

D O I：

10.1103/PhysRevLett.115.228304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Shear thickening is a widespread phenomenon in suspension flow that, despite sustained study, is still the subject of much debate. The longstanding view that shear thickening is due to hydrodynamic clusters has been challenged by recent theory and simulations suggesting that contact forces dominate, not only in discontinuous, but also in continuous shear thickening. Here, we settle this dispute using shear reversal experiments on micron-sized silica and latex particles to measure directly the hydrodynamic and contact force contributions to shear thickening. We find that contact forces dominate even continuous shear thickening. Computer simulations show that these forces most likely arise from frictional interactions.

引用

页数：5

共 41 条

[11] Dynamic Jamming Point for Shear Thickening Suspensions [J].