Imperial College London
Alternate

Dr. Yongyun Hwang

Faculty of Engineering, Department of Aeronautics

Reader in Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5078y.hwang

 
 
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Location

 

337City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Maretvadakethope:2022:10.1103/PhysRevFluids.7.053101,
author = {Maretvadakethope, S and Hwang, Y and Keaveny, E},
doi = {10.1103/PhysRevFluids.7.053101},
journal = {Physical Review Fluids},
pages = {1--17},
title = {Synchronized states of hydrodynamically coupled filaments andtheir stability},
url = {http://dx.doi.org/10.1103/PhysRevFluids.7.053101},
volume = {7},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Cilia and flagella are organelles that play central roles in unicellular locomotion, embryonicdevelopment, and fluid transport around tissues. In these examples, multiple cilia are often foundin close proximity and exhibit coordinated motion. Inspired by the flagellar motion of biflagellatecells, we examine the synchrony exhibited by a filament pair surrounded by a viscous fluid andtethered to a rigid planar surface. A geometrically-switching base moment drives filament motion,and we characterize how the stability of synchonized states depends of the base torque magnitude.In particular, we study the emergence of bistability that occurs when the anti-phase, breast-strokebranch becomes unstable. Using a bisection algorithm, we find the unstable edge-state that existsbetween the two basins of attraction when the system exhibits bistability. We establish a bifurcationdiagram, study the nature of the bifurcation points, and find that the observed dynamical systemcan be captured by a modified version of Adler’s equation. The bifurcation diagram and presenceof bistability reveal a simple mechanism by which the anti-phase breast stroke can be modulated, orswitched entirely to in-phase undulations through the variation of a single bifurcation parameter.
AU  - Maretvadakethope,S
AU  - Hwang,Y
AU  - Keaveny,E
DO  - 10.1103/PhysRevFluids.7.053101
EP  - 17
PY  - 2022///
SN  - 2469-990X
SP  - 1
TI  - Synchronized states of hydrodynamically coupled filaments andtheir stability
T2  - Physical Review Fluids
UR  - http://dx.doi.org/10.1103/PhysRevFluids.7.053101
UR  - https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.7.053101
UR  - http://hdl.handle.net/10044/1/98953
VL  - 7
ER  -
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