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Journal Article

Near-field hydrodynamic interactions determine travelling wave directions of collectively beating cilia

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Vilfan,  Andrej       
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Golestanian,  Ramin       
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Cheng, Z., Vilfan, A., Wang, Y., Golestanian, R., & Meng, F. (2024). Near-field hydrodynamic interactions determine travelling wave directions of collectively beating cilia. Journal of the Royal Society Interface, 21(217): 20240221. doi:10.1098/rsif.2024.0221.


Cite as: https://hdl.handle.net/21.11116/0000-000F-C603-E
Abstract
Cilia can beat collectively in the form of a metachronal wave, and we investigate how near-field hydrodynamic interactions between cilia can influence the collective response of the beating cilia. Based on the theoretical framework developed in the work of Meng et al. (Meng et al. 2021 Proc. Natl Acad. Sci. USA 118, e2102828118), we find that the first harmonic mode in the driving force acting on each individual cilium can determine the direction of the metachronal wave after considering the finite size of the beating trajectories, which is confirmed by our agent-based numerical simulations. The stable wave patterns, e.g. the travelling direction, can be controlled by the driving forces acting on the cilia, based on which one can change the flow field generated by the cilia. This work can not only help to understand the role of the hydrodynamic interactions in the collective behaviours of cilia, but can also guide future designs of artificial cilia beating in the desired dynamic mode.