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Self-organized swimming with odd elasticity.

Kenta Ishimoto1, Clément Moreau1, Kento Yasuda1

  • 1Research Institute for Mathematical Sciences, Kyoto University, Kyoto 606-8502, Japan.

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This summary is machine-generated.

Active materials with odd elasticity can generate self-oscillating waves for self-swimming. This research shows odd elasticity enables microswimmers to achieve directed motion from random noise via elastohydrodynamic interactions.

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Area of Science:

  • Physics
  • Materials Science
  • Soft Matter Physics

Background:

  • Recent theoretical introduction of odd elasticity as a nonsymmetric component of elastic moduli.
  • Odd elasticity describes active materials capable of generating spontaneous motion or oscillations.

Purpose of the Study:

  • To theoretically investigate self-oscillating waves in active materials.
  • To explore the swimming capabilities of odd-elastic filaments using a microswimmer model.
  • To understand how odd elasticity contributes to locomotion in the Stokes regime.

Main Methods:

  • Utilizing Purcell's three-link swimmer model for theoretical analysis.
  • Applying low Reynolds number hydrodynamics and elastohydrodynamic principles.
  • Deriving a general swimming formula for elastic materials with nonsymmetric elasticity moduli.

Main Results:

  • Demonstrated that an odd-elastic filament can achieve self-organized swimming at low Reynolds numbers.
  • Identified stable limit cycles in time-periodic dynamics driven by elastohydrodynamic interactions.
  • Showed that odd elasticity can induce biased net locomotion from random noise in a noisy shape gait.

Conclusions:

  • Odd elasticity is a key property enabling self-propulsion in active materials.
  • Elastohydrodynamic interactions are crucial for generating sustained locomotion and stable dynamics.
  • Odd elasticity offers a mechanism for directed movement in microscale systems, even in the presence of randomness.