Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC01: Biofluids: Cilia and Flagella II
12:50 PM–3:00 PM,
Tuesday, November 21, 2023
Room: Ballroom A
Chair: Hanliang Guo, Ohio Wesleyan University
Abstract: ZC01.00007 : How passive cilia modulate tumbling of microorganisms
2:08 PM–2:21 PM
Presenter:
Alessandro Nitti
(Polytechnic University of Bari)
Authors:
Alessandro Nitti
(Polytechnic University of Bari)
Marco D. de Tullio
(Politechnic University of Bari)
Christophe Eloy
(IRPHE, Centrale Méditerranée, Marseille)
In this connection, we propose a simple two-way coupled model to describe the kinematics of a ciliated spherical microorganism subjected to a shear flow. Each cilium is modelled as a rigid slender rod connected to the body surface by a bi-cylindrical hinge, such that the kinematics of each cilium is resolved in terms of the Euler angles. The hydrodynamic torque exerted on the cilia is computed by integrating the Johnson’s slender body formulation endowed with the suited image system. This model provides meaningful insights about the effect of the ciliary torque on the kinematics of microorganisms.
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