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Synchronization and metachronal waves of elastic cilia caused by transient viscous flow

von Kenne, A.; Schmelter, S.; Stark, H.; Baer, M.

2024-06-17 biophysics
10.1101/2024.06.15.599160 bioRxiv
Show abstract

Hydrodynamic coordination of cilia is ubiquitous in biology. It is commonly modeled using the steady Stokes equations. The flow around ciliated cells, however, exhibits finite time vorticity diffusion, requiring a dynamical description. We present a model of elastic cilia coupled by transient viscous flow in the bulk fluid. Therein, vorticity diffusion impacts cilia coordination qualitatively and quantitatively. In particular, pairs of cilia synchronize in antiphase for long diffusion times. Moreover, metachronal waves occur in cilia chains larger than the viscous penetration depth, whereas global synchronization occurs in Stokes flow.

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