Tuning Steady Shear Rheology through Active Dopants

Abstract

We numerically investigate the steady shear rheology of mixtures of active and passive Brownian particles, with varying fractions of active components. We find that even a small fraction of active dopants triggers fluidization with comparable efficiency to fully active systems. A combined parameter, active energy, given by dopant fraction multiplied by propulsion speed squared controls the steady shear rheology and glass transition of the active-passive mixtures. These results together provide a quantitative strategy for fine-tuning the mechanical properties of a soft material with small amounts of active dopants.

7 pages, 5 figures

References in corpus (43)

• Theoretical perspective on the glass transition and amorphous materials
• Motility-driven glass and jamming transitions in biological tissues
• The Physics of the Colloidal Glass Transition
• Collective Motion of Vibrated Polar Disks
• The Jamming Transition in Granular Systems
• Critical Scaling of Shear Viscosity at the Jamming Transition
• Turning bacteria suspensions into a "superfluid"
• Computational models for active matter
• Jamming transition in emulsions and granular materials
• Effective viscosity of microswimmer suspensions
• Phase separation and rotor self-assembly in active particle suspensions
• Nonequilibrium glass transitions in driven and active matter
• Nonequilibrium dynamics and fluctuation-dissipation relation in a sheared fluid
• Unified study of glass and jamming rheology in soft particle systems
• Cooperative Motion of Active Brownian Spheres in Three-Dimensional Dense Suspensions
• Pushing the glass transition towards random close packing using self-propelled hard spheres
• Non-Newtonian viscosity of E-coli suspensions
• Nonequilibrium glassy dynamics of self-propelled hard disks
• Dense active matter model of motion patterns in confluent cell monolayers
• Selective and Collective Actuation in Active Solids
• Approach to jamming in an air-fluidized granular bed
• Phase Diagram of Active Brownian Spheres: Crystallization and the Metastability of Motility-Induced Phase Separation
• Rate Dependence and Role of Disorder in Linearly Sheared Two-Dimensional Foams
• Brownian dynamics of a self-propelled particle in shear flow
• Activity controls fragility: A Random First Order Transition Theory for an active glass
• How active forces influence nonequilibrium glass transitions
• Active glasses
• Cell division and death inhibit glassy behaviour of confluent tissues
• Active glass: ergodicity breaking dramatically affects response to self-propulsion
• Flowing crystal of self-propelled particles
• From single-particle to collective effective temperatures in an active fluid of self-propelled particles
• Crystallizing hard-sphere glasses by doping with active particles
• Nonequilibrium mode-coupling theory for dense active systems of self-propelled particles
• Phase separation and multibody effects in three-dimensional active Brownian particles
• A direct link between active matter and sheared granular systems
• Flow in linearly sheared two dimensional foams: from bubble to bulk scale
• Self-enhanced mobility enables vortex pattern formation in living matter
• Response of active Brownian particles to shear flow
• Mean-field dynamics of infinite-dimensional particle systems: global shear versus random local forcing
• Rheological similarities between dense self-propelled and sheared particulate systems
• Active dry granular flows: rheology and rigidity transitions
• Fluid-Glass-Jamming Rheology of Soft Active Brownian Particles
• Shear Induced Orientational Ordering in Active Glass