Helical flow states in active nematics

Ryan R. Keogh; Santhan Chandragiri; Benjamin Loewe; Tapio Ala-Nissila; Sumesh P. Thampi; Tyler N. Shendruk

doi:10.1103/PhysRevE.106.L012602

Helical flow states in active nematics

Ryan R. Keogh, Santhan Chandragiri, Benjamin Loewe, Tapio Ala-Nissila, Sumesh P. Thampi, Tyler N. Shendruk^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

We 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.

Original language	English
Article number	L012602
Pages (from-to)	1-6
Number of pages	6
Journal	Physical Review E
Volume	106
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevE.106.L012602
Publication status	Published - Jul 2022
MoE publication type	A1 Journal article-refereed

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10.1103/PhysRevE.106.L012602

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title = "Helical flow states in active nematics",

abstract = "We 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.",

author = "Keogh, {Ryan R.} and Santhan Chandragiri and Benjamin Loewe and Tapio Ala-Nissila and Thampi, {Sumesh P.} and Shendruk, {Tyler N.}",

note = "Funding Information: We thank Kevin Stratford and Kristian Thijssen for invaluable help. This research has received funding (TNS) from the European Research Council under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 851196). S.P.T. acknowledges the support by the Department of Science and Technology, India, via Research Grant No. CRG/2018/000644. T.A.-N. has been supported in part by the Academy of Finland PolyDyna (No. 307806) and QFT Center of Excellence Program grant (No. 312298). Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

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doi = "10.1103/PhysRevE.106.L012602",

language = "English",

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AU - Keogh, Ryan R.

AU - Chandragiri, Santhan

AU - Loewe, Benjamin

AU - Ala-Nissila, Tapio

AU - Thampi, Sumesh P.

AU - Shendruk, Tyler N.

N1 - Funding Information: We thank Kevin Stratford and Kristian Thijssen for invaluable help. This research has received funding (TNS) from the European Research Council under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 851196). S.P.T. acknowledges the support by the Department of Science and Technology, India, via Research Grant No. CRG/2018/000644. T.A.-N. has been supported in part by the Academy of Finland PolyDyna (No. 307806) and QFT Center of Excellence Program grant (No. 312298). Publisher Copyright: © 2022 American Physical Society.

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N2 - We 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.

AB - We 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.

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Helical flow states in active nematics

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Finnish Centre of Excellence in Quantum Technology

PolyDyna: Coarse-Grained Modeling of Translocation and Polymer Dynamics in Nanofluidic Systems

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Helical flow states in active nematics

Abstract

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Finnish Centre of Excellence in Quantum Technology

PolyDyna: Coarse-Grained Modeling of Translocation and Polymer Dynamics in Nanofluidic Systems

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