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Emergent turbulence and coarsening arrest in active-spinner fluids
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abstract
We uncover activity-driven crossover from phase separation to a new turbulent state in a two-dimensional system of counter-rotating spinners. We study the statistical properties of this active-rotor turbulence using the active-rotor Cahn-Hilliard-Navier-Stokes model, and show that the vorticity $\omega \propto \phi$, the scalar field that distinguishes regions with different rotating states. We explain this intriguing proportionality theoretically, and we characterize power-law energy and concentration spectra, intermittency, and flow-topology statistics. We suggest biological implications of such turbulence.
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Cited by 1 Pith paper
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Vortex triplets, symmetry breaking, and emergent nonequilibrium plastic crystals in an active-spinner fluid
A 2D model of a fluid of active rotors spontaneously forms a triangular crystal of spinning vortex triplets, identified by the authors as a nonequilibrium plastic crystal.
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