Shear-Induced First-Order Transition in Polar Liquid Crystals

Tomer Markovich; Elsen Tjhung; Michael E. Cates

doi:10.1103/PhysRevLett.122.088004

Shear-Induced First-Order Transition in Polar Liquid Crystals

Tomer Markovich, Elsen Tjhung, Michael E. Cates

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

21 Scopus citations

Abstract

The hydrodynamic theory of polar liquid crystals is widely used to describe biological active fluids as well as passive molecular materials. Depending on the "shear-alignment parameter", in passive or weakly active polar fluids under external shear, the polar order parameter p is either inclined to the flow at a fixed (Leslie) angle, or rotates continuously. Here, we study the role of an additional "shear-elongation parameter" that has been neglected in the recent literature and causes |p| to change under flow. We show that this effect can give rise to a shear-induced first-order phase transition from isotropic to polar, and significantly change the rheological properties of both active and passive polar fluids.

Original language	English
Article number	088004
Journal	Physical Review Letters
Volume	122
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.122.088004
State	Published - 28 Feb 2019
Externally published	Yes

Funding

Funders	Funder number
EU’s Horizon 2020 programme	760769
National Science Foundation Center for Theoretical Biological Physics	PHY-1427654
Horizon 2020 Framework Programme	1427654, 740269
Royal Society
European Research Council

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10.1103/PhysRevLett.122.088004

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Shear-Induced First-Order Transition in Polar Liquid Crystals

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