Complex Spontaneous Flows and Concentration Banding in Active Polar Films
Complex Spontaneous Flows and Concentration Banding in Active Polar Films
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DOI：
10.1103/physrevlett.101.198101
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发表时间：
2008-11-07
影响因子：
8.6
通讯作者：
Liverpool, Tanniemola B.
中科院分区：
文献类型：
--
作者：
Giomi, Luca;Marchetti, M. Cristina;Liverpool, Tanniemola B.
研究了活性极性液晶膜的动力学性质。像有源向列膜一样，有源极性膜也经历动态过渡到自发流动的稳态。然而，极性流体中的自发流动总是伴随着强烈的浓度不均匀性或“带状”，这在向列式中是看不到的。此外，极性活性膜的一个独特特性是它们即使在低活性下也能自发地产生振荡和带状流动。强极性使振荡流变得越来越复杂。
We study the dynamical properties of active polar liquid crystalline films. Like active nematic films, active polar films undergo a dynamical transition to spontaneously flowing steady states. Spontaneous flow in polar fluids is, however, always accompanied by strong concentration inhomogeneities or "banding" not seen in nematics. In addition, a spectacular property unique to polar active films is their ability to generate spontaneously oscillating and banded flows even at low activity. The oscillatory flows become increasingly complicated for strong polarity.