Affine and nonaffine motions in sheared polydisperse emulsions

被引：18

作者：

Clara-Rahola, J. ^{[1
]}

Brzinski, T. A. ^{[1
]}

Semwogerere, D. ^{[1
]}

Feitosa, K. ^{[2
]}

Crocker, J. C. ^{[2
]}

Sato, J. ^{[3
]}

Breedveld, V. ^{[3
]}

Weeks, Eric R. ^{[1
]}

机构：

[1] Emory Univ, Dept Phys, Atlanta, GA 30322 USA

[2] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA

[3] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

来源：

PHYSICAL REVIEW E | 2015年 / 91卷 / 01期

基金：

瑞士国家科学基金会; 美国国家科学基金会;

关键词：

CONCENTRATED EMULSIONS; RHEOLOGY; REARRANGEMENTS; DYNAMICS; FLOW; GLASSES; FOAMS;

D O I：

10.1103/PhysRevE.91.010301

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：

We study dense and highly polydisperse emulsions at droplet volume fractions phi >= 0.65. We apply oscillatory shear and observe droplet motion using confocal microscopy. The presence of droplets with sizes several times the mean size dramatically changes the motion of smaller droplets. Both affine and nonaffine droplet motions are observed, with the more nonaffine motion exhibited by the smaller droplets which are pushed around by the larger droplets. Droplet motions are correlated over length scales from one to four times the mean droplet diameter, with larger length scales corresponding to higher strain amplitudes (up to strains of about 6%).

引用

页数：5

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