Metachronal wave and hydrodynamic interaction for deterministic switching rowers

Details Metachronal wave and hydrodynamic interaction for deterministic switching rowers Metachronal wave and hydrodynamic interaction for deterministic switching rowers

2003-01-24

arxiv.org/abs/physics/0301061v2

Physics

Biological Physics

11 pages, 7 figures

Scientific paper

We employ a model system, called rowers, as a generic physical framework to define the problem of the coordinated motion of cilia (the metachronal wave) as a far from equilibrium process. Rowers are active (two-state) oscillators interacting solely through forces of hydrodynamic origin. In this work, we consider the case of fully deterministic dynamics, find analytical solutions of the equation of motion in the long wavelength (continuum) limit, and investigate numerically the short wavelength limit. We prove the existence of metachronal waves below a characteristic wavelength. Such waves are unstable and become stable only if the sign of the coupling is reversed. We also find that with normal hydrodynamic interaction the metachronal pattern has the form of stable trains of traveling wave packets sustained by the onset of anti-coordinated beating of consecutive rowers.

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