article · 13/09/2021
A bending fluctuation-based mechanism for particle detection by ciliated structures
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Résumé
To mimic the mechanical response of passive biological cilia in complex fluids, we study the bending dynamics of an anchored elastic fiber submitted to a dilute granular suspension under shear. We show that the bending fluctuations of the fiber accurately encode minute variations of the granular suspension concentration. Indeed, besides the stationary bending induced by the continuous phase flow, the passage of each single particle induces an additional deflection. We demonstrate that the dominant particle/fiber interaction arises from contacts of the particles with the fiber, and we propose a simple elastohydrodynamics model to predict their amplitude. Our results provide a mechanistic and statistical framework to describe particle detection by biological ciliated systems.
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Thomazo, J.-B., Le Réverend, B., Pontani, L.-L., Prevost, A., & Wandersman, E. (2021). A bending fluctuation-based mechanism for particle detection by ciliated structures. PNAS, 118(31). https://doi.org/https://doi.org/10.1073/pnas.2020402118@article{Thomazo2021_335,
author = {Thomazo, Jean-Baptiste and Le Réverend, Benjamin and Pontani, Léa-Laetitia and Prevost, Alexis and Wandersman, Elie},
year = {2021},
month = {9},
title = {A bending fluctuation-based mechanism for particle detection by ciliated structures},
journal = {PNAS},
volume = {118},
number = {31},
abstract = {To mimic the mechanical response of passive biological cilia in complex fluids, we study the bending dynamics of an anchored elastic fiber submitted to a dilute granular suspension under shear. We show that the bending fluctuations of the fiber accurately encode minute variations of the granular suspension concentration. Indeed, besides the stationary bending induced by the continuous phase flow, the passage of each single particle induces an additional deflection. We demonstrate that the dominant particle/fiber interaction arises from contacts of the particles with the fiber, and we propose a simple elastohydrodynamics model to predict their amplitude. Our results provide a mechanistic and statistical framework to describe particle detection by biological ciliated systems.},
url = {https://www.pnas.org/content/118/31/e2020402118.short},
doi = {https://doi.org/10.1073/pnas.2020402118},
}TY - JOUR
AU - Thomazo, Jean-Baptiste
AU - Le Réverend, Benjamin
AU - Pontani, Léa-Laetitia
AU - Prevost, Alexis
AU - Wandersman, Elie
PY - 2021
DA - 2021/09/13
TI - A bending fluctuation-based mechanism for particle detection by ciliated structures
JO - PNAS
VL - 118
IS - 31
AB - To mimic the mechanical response of passive biological cilia in complex fluids, we study the bending dynamics of an anchored elastic fiber submitted to a dilute granular suspension under shear. We show that the bending fluctuations of the fiber accurately encode minute variations of the granular suspension concentration. Indeed, besides the stationary bending induced by the continuous phase flow, the passage of each single particle induces an additional deflection. We demonstrate that the dominant particle/fiber interaction arises from contacts of the particles with the fiber, and we propose a simple elastohydrodynamics model to predict their amplitude. Our results provide a mechanistic and statistical framework to describe particle detection by biological ciliated systems.
DO - https://doi.org/10.1073/pnas.2020402118
UR - https://www.pnas.org/content/118/31/e2020402118.short
ER -