Complex Spontaneous Flows and Concentration Banding in Active Polar Films

Details Complex Spontaneous Flows and Concentration Banding in Active Polar Films Complex Spontaneous Flows and Concentration Banding in Active Polar Films

2008-05-12

arxiv.org/abs/0805.1680v1

Phys. Rev. Lett. 101, 198101 (2008)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.198101

We study the dynamical properties of active polar liquid crystalline films. Like active nematic films, active polar films undergo a dynamical transitions 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.

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