Curvature controlled defect dynamics in topological active nematics
- Date
- Nov 2, 2017
- Time
- 3:00 PM - 3:30 PM
- Speaker
- Francesco Alaimo
- Affiliation
- TUD
- Language
- en
- Main Topic
- Physik
- Other Topics
- Physik
- Description
- We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system. We consider ellipsoidal shapes for which the resulting defects are 1/2 disclinations and analyze the relation between their location and dynamics and local geometric properties of the ellipsoid. We highlight two dynamic modes: a tunable periodic state that oscillates between two defect configurations on a spherical shape and a tunable rotating state for oblate spheroids. We further demonstrate the relation between defects and high Gaussian curvature and umbilical points and point out limits for a coarse-grained description of defects as self-propelled particles.
Last modified: Nov 2, 2017, 8:48:16 AM
Location
Max-Planck-Institut für Physik komplexer Systeme (Seminarroom 4)Nöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
Organizer
Max-Planck-Institut für Physik komplexer SystemeNöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
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