Whitfield, C.A. and Hawkins, R.J. (2016) Instabilities, motion and deformation of active fluid droplets. New Journal of Physics, 18 (12). ISSN 1367-2630
Abstract
We consider two minimal models of active fluid droplets that exhibit complex dynamics including steady motion, deformation, rotation and oscillating motion. First we consider a droplet with a concentration of active contractile matter adsorbed to its boundary. We analytically predict activity driven instabilities in the concentration profile, and compare them to the dynamics we find from simulations. Secondly, we consider a droplet of active polar fluid of constant concentration. In this system we predict, motion and deformation of the droplets in certain activity ranges due to instabilities in the polarisation field. Both these systems show spontaneous transitions to motility and deformation which resemble dynamics of the cell cytoskeleton in animal cells.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (https://creativecommons.org/licenses/by/3.0/). |
Keywords: | active fluids; droplets; cell motility; instabilities; active matter; spontaneous motion; out of equilibrium |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/L026848/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 18 Jan 2017 14:27 |
Last Modified: | 18 Jan 2017 14:27 |
Published Version: | http://doi.org/10.1088/1367-2630/18/12/123016 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1367-2630/18/12/123016 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110602 |