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Active nematic fluids in channels create ordered vortex lattices and dynamic topological disclinations. This self-assembly in engineered geometries could lead to new active topological microfluidic devices.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Soft Matter

Background:

  • Active fluids exhibit spontaneous collective flows, often resulting in chaotic patterns with swirls and topological defects.
  • Controlling these flows and defects is crucial for designing functional active systems.

Purpose of the Study:

  • To investigate the self-organization of active nematic fluids confined within a channel.
  • To explore the emergence of structured flows and ordered topological disclinations.

Main Methods:

  • Confining an active nematic fluid within a microchannel.
  • Observing and analyzing the dynamics of topological disclinations and flow patterns.

Main Results:

  • A regular motion of disclinations was observed, forming a dynamic vortex lattice.
  • Disclination pairs continuously exchanged partners, creating a dynamic ordered state.
  • The system exhibited biomimetic self-assembly of topological defects and structured flow fields.

Conclusions:

  • Confining active nematic fluids in channels promotes the formation of ordered topological structures and dynamic flow fields.
  • This controlled self-assembly offers a pathway for developing novel active topological microfluidic devices.