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Area of Science:

  • Fluid Dynamics
  • Rheology
  • Particle Transport

Background:

  • Elastic turbulence is a flow regime in viscoelastic fluids.
  • Heavy inertial particles exhibit complex behaviors in turbulent flows.
  • Understanding particle aggregation is crucial for various industrial and environmental processes.

Purpose of the Study:

  • Investigate heavy inertial particle aggregation in elastic turbulence.
  • Analyze particle distribution at small and large scales.
  • Connect particle behavior to viscoelastic flow properties.

Main Methods:

  • Extensive two-dimensional numerical simulations.
  • Analysis of particle distribution in relation to flow structures.
  • Development of a model for small, finite particle inertia.

Main Results:

  • Particles preferentially accumulate on elastic, propagating structures.
  • Aggregation is strongest for intermediate particle inertia.
  • Turbophoretic-like segregation observed at larger scales, linked to velocity fluctuations.

Conclusions:

  • Particle aggregation is strongly influenced by viscoelastic flow structures.
  • A model for particle inertia explains large-scale segregation.
  • Flow elasticity has a minor impact on segregation, reducing unmixing with increased elasticity.