Vorticity structuring and velocity rolls triggered by gradient shear bands

被引：49

作者：

Fielding, Suzanne M.

机构：

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

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

来源：

PHYSICAL REVIEW E | 2007年 / 76卷 / 01期

关键词：

WORMLIKE MICELLES; FLOW; INSTABILITY; BEHAVIOR; MODEL; STABILITY; STRESS;

D O I：

10.1103/PhysRevE.76.016311

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 suggest a mechanism by which vorticity structuring and velocity rolls can form in complex fluids, triggered by the linear instability of one-dimensional gradient shear banded flow. We support this with a numerical study of the diffusive Johnson-Segalman model. In the steady vorticity structured state, the thickness of the interface between the bands remains finite in the limit of zero stress diffusivity, presenting a possible challenge to the accepted theory of shear banding.

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页数：8

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