Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M22: Biological Fluid Dynamics: Locomotion Swimming
8:00 AM–10:10 AM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B310
Chair: Megan Leftwich, George Washington University
Abstract ID: BAPS.2018.DFD.M22.7
Abstract: M22.00007 : Buckling of sperm flagella in an extensional flow*
9:18 AM–9:31 AM
Presenter:
Manish Kumar
(Purdue University)
Authors:
Manish Kumar
(Purdue University)
Derek M. Walkama
(Tufts University)
Jeffrey S. Guasto
(Tufts University)
Arezoo M. Ardekani
(Purdue University)
Swimming cells live in dynamic fluid environments. Here, we probe the buckling dynamics of sperm flagella in an extensional flow and show good agreement between microfluidic experiments and numerical simulations. The sperm number, representing the ratio of viscous force and elastic force, characterizes the buckling behavior of the sperm flagella. We quantify the phase diagram of flagella deformation and bucking behavior for different sperm numbers and normalized strain rates. At small sperm numbers and strain rates, flagella exhibit minor elastic deflection, whereas at high sperm numbers and strain rates, multiple buckling modes occur corresponding to large deformations at multiple locations along the flagellum.
*National Science Foundation
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M22.7
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