helical.pdf (2.2 MB)
Helical flow states in active nematics
journal contribution
posted on 2022-09-21, 13:26 authored by Ryan Keogh, Santhan Chandragiri, Benjamin Loewe, Tapio Ala-NissilaTapio Ala-Nissila, Sumesh P Thampi, Tyler N ShendrukWe show that confining extensile nematics in three-dimensional (3D) channels leads to the emergence of two self-organized flow states with nonzero helicity. The first is a pair of braided antiparallel streams - this double helix occurs when the activity is moderate, anchoring negligible, and reduced temperature high. The second consists of axially aligned counter-rotating vortices - this grinder train arises between spontaneous axial streaming and the vortex lattice. These two unanticipated helical flow states illustrate the potential of active fluids to break symmetries and form complex but organized spatiotemporal structures in 3D fluidic devices.
Funding
Department of Science and Technology, India, via Research Grant No. CRG/2018/000644
QFT Center of Excellence Program grant (No. 312298)
Academy of Finland PolyDyna (No. 307806)
History
School
- Science
Department
- Mathematical Sciences
Published in
Physical Review EVolume
106Issue
1Publisher
American Physical Society (APS)Version
- AM (Accepted Manuscript)
Rights holder
© American Physical SocietyPublisher statement
This paper was accepted for publication in the journal Physical Review E and the definitive published version is available at https://doi.org/10.1103/physreve.106.l012602Acceptance date
2022-06-09Publication date
2022-07-07Copyright date
2022ISSN
2470-0045eISSN
2470-0053Publisher version
Language
- en