Instabilities and topological defects in active nematics
By S. Thampi, R. Golestanian, Julia M. Yeomans. 2013
149 citations recorded by the source corpus.
We study a continuum model of an extensile active nematic to show that mesoscale turbulence develops in two stages: i) ordered regions undergo an intrinsic hydrodynamic instability generating walls, lines of strong bend deformations; ii) the walls relax by forming oppositely charged pairs of defects. Both creation and annihilation of defect pairs reinstate nematic regions which undergo further instabilities, leading to a dynamic steady state. We compare this with the development of active turbulence in a contractile active nematic.
Subfields: Biomedical Engineering, Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/b375b2051e8bb5a221b5ea4ec6e5e3a5a53f9b70
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In Biomedical Engineering
In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- The Dynamics of Microtubule/Motor-Protein Assemblies in Biology and Physics (2016, methodology): “Figure 9b shows that these defects exist in regions of low nematic order and are born as opposing pairs in elongated incipient crack regions, qualitatively similar to the structures found in both experiments and apolar models (Giomi et al. 2013, 2014; Thampi et al. 2013, 2014).”
- Geometry and topology of turbulence in active nematics (2014, unknown): “elastic distortion and hydrodynamic flow [22, 23, 25].”
- Active Turbulence (2021, background): “As the activity increases, the walls decay into pairs of +1/2 and −1/2 defects [36, 110, 111], which can unbind because of the self-propulsion of +1/2 defects.”