Shearing active gels close to the isotropic-nematic transition

被引：132

作者：

Cates, M. E. ^{[1
]}

Fielding, S. M. ^{[2
,3
]}

Marenduzzo, D. ^{[1
]}

Orlandini, E. ^{[4
,5
]}

Yeomans, J. M. ^{[6
]}

机构：

[1] Univ Edinburgh, Sch Phys, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Manchester, Manchester Ctr Nonlinear Dynam, Manchester M13 9EP, Lancs, England

[3] Univ Manchester, Sch Math, Manchester M13 9EP, Lancs, England

[4] Univ Padua, Sez INFN, I-31121 Padua, Italy

[5] CNISM, Dipartimento Fis, I-31121 Padua, Italy

[6] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.068102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study numerically the rheological properties of a slab of active gel close to the isotropic-nematic transition. The flow behavior shows a strong dependence on the sample size, boundary conditions, and on the bulk constitutive curve, which, on entering the nematic phase, acquires an activity-induced discontinuity at the origin. The precursor of this within the metastable isotropic phase for contractile systems (e. g., actomyosin gels) gives a viscosity divergence; its counterpart for extensile suspensions admits instead a shear-banded flow with zero apparent viscosity.

引用

页数：4

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