Shear instabilities of freely standing thermotropic smectic-A films

被引：1

作者：

Chen, HY ^{[1
]}

Jasnow, D ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.85.2957

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this Letter we discuss theoretically the instabilities of thermotropic freely standing smectic-A films under shear flow [3]. We show that, in Couette geometry, the centrifugal force;pushes the liquid crystal toward the outer boundary and induces smectic layer dilation close to the outer boundary. Under strong shear, this effect induces a layer buckling instability. The critical shear rate is proportional to 1/root d, where d is the thickness of the film.

引用

页码：2957 / 2960

页数：4

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