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Modulating drift dynamics of circle swimmers by periodic potentials.

Mohammad Nabil1,2, Andrew Frankowski1,2, Ashton Orosa1,2

  • 1Department of Mechanical Engineering, University of Akron, Akron, Ohio 44325, USA.

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We developed a method to control circle swimmers in fluid flows using static potentials. This technique allows for the separation of artificial and biological swimmers based on their unique dynamic properties.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Statistical Mechanics

Background:

  • Overdamped circle swimmers exhibit complex motion in fluid flows.
  • Controlling microswimmer trajectories is crucial for various applications.

Purpose of the Study:

  • To propose and analyze a method for modulating the drift motion of circle swimmers.
  • To investigate the influence of static sinusoidal potentials on swimmer dynamics.

Main Methods:

  • Utilizing Langevin formalism to model swimmer dynamics.
  • Analyzing drift velocity as a function of potential strength and wavelength.
  • Investigating the effects of diffusional motion (noise).

Main Results:

  • Drift velocity shows quantized behavior without diffusion, becoming continuous with noise.
  • Observed damped oscillatory and plateau regimes in drift velocity based on potential parameters.
  • Identified a regime where swimmer drift velocity exceeds fluid velocity under specific conditions.

Conclusions:

  • Static sinusoidal potentials effectively modulate circle swimmer drift.
  • The findings enable the separation of biological and artificial circle swimmers.
  • This method offers a new approach for controlling and distinguishing microswimmers.