A connection between living liquid crystals and electrokinetic phenomena in nematic fluids

Christopher Conklin, Jorge Viñals, Oriol T. Valls

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We develop a formal analogy between configurational stresses in physically distinct systems, and study the flows that they induce when the configurations of interest include topological defects. Our primary focus is on electrokinetic flows in a nematic fluid under an applied electrostatic field, which we compare with a class of systems in which internal stresses are generated due to configurational changes (e.g., active matter, liquid crystal elastomers). The mapping allows the extension, within certain limits, of existing results on transport in electrokinetic systems to active transport. We study motion induced by a pair of point defects in a dipole configuration, and steady rotating flows due to a swirling vortex nematic director pattern. The connection presented allows the design of electrokinetic experiments that correspond to particular active matter configurations that may be easier to conduct and control in the laboratory.

Original languageEnglish (US)
Pages (from-to)4641-4648
Number of pages8
JournalSoft Matter
Volume14
Issue number22
DOIs
StatePublished - 2018

Bibliographical note

Funding Information:
We are indebted to Oleg Lavrentovich for introducing us to the subject of Living Liquid Crystals, and for sharing experimental data. We are also indebted to Chandan Dasgupta and Peter Stoeckl for many stimulating discussions. This research has been supported by the National Science Foundation under contract DMS 1435372, by the Minnesota Supercomputing Institute, and by the Extreme Science and Engineering Discovery Environment (XSEDE),33 which is supported by National Science Foundation grant number ACI 1548562.

Funding Information:
This research has been supported by the National Science Foundation under contract DMS 1435372, by the Minnesota Supercomputing Institute, and by the Extreme Science and Engineering Discovery Environment (XSEDE),33 which is supported by National Science Foundation grant number ACI 1548562.

Publisher Copyright:
© 2018 The Royal Society of Chemistry.

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