Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L19: Biological Fluid Dynamics: Collective Behavior and Microswimmers
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center Room: B306
Chair: David Hu, Georgia Institute of Technology
Abstract ID: BAPS.2018.DFD.L19.2
Abstract: L19.00002 : Self-organized multi-timescale dynamics in a confined active nematic*
4:18 PM–4:31 PM
(University of California Santa Barbara)
Confining an active nematic suspension composed of microtubules and kinesin motor clusters to a disk below a critical diameter tames the otherwise turbulent flows observed in bulk into a single, system-sized vortex. This circulating flow is driven by two, topologically required +1/2 defects. In contrast to hydrodynamic theory, which predicts stable orbits, this state is periodically disrupted by boundary nucleation of a +/- 1/2 defect pair at a regular interval that is longer than the defect procession period. The nature of these slow periodic dynamics that are superimposed on the faster, procession dynamics will be the focus of this talk.
*The experimental portion of this study was primarily supported by the DOE-BES through award DE-SC0010432TDD. Development of supporting microfluidic technology was provided by Brandeis MRSEC through NSF-MRSEC-1420382. Computational work was supported by NSF-DMR-1810077.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L19.2
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