Intermittency, fluctuations and maximal chaos in an emergent universal state of active turbulence

Abstract

A hydrodynamic model of active, low Reynolds number suspensions, shows the emergence of an asymptotic state with a universal spectral scaling and non-Gaussian (intermittent) fluctuations in the velocity field. Such states arise when these systems are pushed beyond a critical level of activity and show features akin to high Reynolds number, inertial turbulence. We provide compelling numerical and analytical evidence for the existence of such a transition at a critical value of activity and further show that the maximally chaotic states are tied to this transition.

8 Pages, 4 Figures

References in corpus (10)

• Meso-scale turbulence in living fluids
• Active matter
• Active Turbulence
• Chaos and predictability of homogeneous-isotropic turbulence
• Anomalous diffusion and Lévy walks distinguish active from inertial turbulence
• Variable energy flux in turbulence
• Giant vortex dynamics in confined active turbulence
• Coexistence of active and hydrodynamic turbulence in two dimensional active nematics
• Lagrangian Manifestation of Anomalies in Active Turbulence
• Energy transfer in simple and active binary fluid turbulence {\bf {-}} a false friend of incompressible MHD turbulence

Cited by in corpus (14)

• Pattern formation by turbulent cascades
• Spontaneous Self-Constraint in Active Nematic Flows
• Emerging mesoscale flows and chaotic advection in dense active matter
• Onset of Intermittency and Multiscaling in Active Turbulence
• Nonlinear spontaneous flow instability in active nematics
• Flocking turbulence of microswimmers in confined domains
• Self-sustained patchy turbulence in shear-thinning active fluids
• Vortex pattern stabilization in thin films resulting from shear thickening of active suspensions
• Emergence of Local Ordering and Mesoscale Giant Number Fluctuations in Active Turbulence
• Cascades and Kolmogorov's lognormal scaling in two-dimensional bacterial turbulence
• Extended self-similarity in two-dimensional complex plasmas
• Fluid flow and spatiotemporal chaos in chemically active emulsions
• Uncertainty Growth in Stably Stratified Turbulence
• Chaos suppression via adaptive feedback control of intermittency: From exactly solvable ergodic maps to interacting microbubble clusters