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  Driven active and passive nematics

Thampi, S. P., Golestanian, R., & Yeomans, J. M. (2015). Driven active and passive nematics. Molecular Physics, 113(17-18), 2656-2665. doi:10.1080/00268976.2015.1031840.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-7636-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-7637-D
Genre: Journal Article

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Thampi, S. P., Author
Golestanian, Ramin1, Author              
Yeomans, J. M., Author
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1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2570692              

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 Abstract: We investigate similarities in the micro-structural dynamics between externally driven and actively driven nematics. Walls, lines of strong deformations in the director field, and topological defects are characteristic features of an active nematic. Similar structures form in driven passive nematics when there are inhomogeneities in imposed velocity gradients due to nonlinear flow fields or geometrical constraints. Specifically, pressure driven flow of a tumbling passive nematic in an expanding-contracting channel produces walls and defects similar to those seen in active nematics. We also study the response of active nematics to external driving, confirming that imposed shear suppresses the hydrodynamic instabilities. We show that shear fields can lead to wall alignments and the localisation of active turbulence. © 2015 © 2015 Taylor Francis.

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Language(s): eng - English
 Dates: 2015-04-242015
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1080/00268976.2015.1031840
BibTex Citekey: Thampi2015a
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Title: Molecular Physics
Source Genre: Journal
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Pages: - Volume / Issue: 113 (17-18) Sequence Number: - Start / End Page: 2656 - 2665 Identifier: -