Activity-enhanced shear thinning of flexible linear polar polymers
arXiv:2505.17539 · doi:10.1103/PhysRevE.111.055413
Abstract
The rheological properties of tangentially propelled flexible polymers under linear shear flow are studied by computer simulations and are compared with analytical calculations. We find a significant impact of the coupled nonequilibrium active and shear forces on the polymer characteristics. The polar activity enhances shear-induced stretching along the flow direction, shrinkage in the transverse direction, and implies a strongly amplified shear-thinning behavior. The characteristic shear rate for the onset of these effects is determined by the activity. In the asymptotic limit of large activities, the shear-induced features become independent of activity, and for asymptotically large shear rates, shear dominates over activity with passive polymer behavior.
11 pages, 10 figures
References in corpus (25)
- The hydrodynamics of swimming microorganisms
- Physics of Microswimmers - Single Particle Motion and Collective Behavior
- Rheology of Active-Particle Suspensions
- Turning bacteria suspensions into a "superfluid"
- Self-propelled Worm-like Filaments: Spontaneous Spiral Formation, Structure, and Dynamics
- Semidilute Polymer Solutions at Equilibrium and under Shear Flow
- The physics of active polymers and filaments
- Non-Newtonian viscosity of E-coli suspensions
- Globule-like conformation and enhanced diffusion of active polymers
- Single Polymer Dynamics for Molecular Rheology
- Small activity differences drive phase separation in active-passive polymer mixtures
- Oscillatory surface rheotaxis of swimming E. coli bacteria
- Unusual swelling of a polymer in a bacterial bath
- Polymer chain stiffness versus excluded volume: A Monte Carlo study of the crossover towards the wormlike chain model
- Structure and dynamics of a self-propelled semiflexible filament
- Active polymer rings: activity-induced collapse and dynamical arrest
- Phase Separation by Entanglement of Active Polymerlike Worms
- Conformation and dynamics of a self-avoiding active flexible polymer
- Rheology of Active Polymer-like T. Tubifex Worms
- Dynamics of a Semiflexible Polymer or Polymer Ring in Shear Flow
- Effects of inertia on conformation and dynamics of tangentially-driven active filaments
- Tangentially Driven Active Polar Linear Polymers -- An Analytical Study
- The Coil-Globule transition in self-avoiding active polymers
- Dilute polymer solutions under shear flow: comprehensive qualitative analysis using a bead-spring chain model with a FENE-Fraenkel spring
- Characteristic features of self-avoiding active Brownian polymers under linear shear flow