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Nonlinear multimode buckling dynamics examined with semiflexible paramagnetic filaments
Jingjing Zhao1, Di Du1, Sibani Lisa Biswal1
1Department of Chemical & Biomolecular Engineering, Rice University, Houston, Texas 77005, USA.
Physical Review. E
|August 17, 2018
Summary
We studied superparamagnetic filaments buckling under magnetic fields. Hydrodynamic drag significantly impacts the development stage, causing nonlinear dynamics and affecting contraction dynamics.
Area of Science:
- Physics
- Materials Science
- Fluid Dynamics
Background:
- Superparamagnetic filaments are utilized in various microfluidic and biomedical applications.
- Understanding their behavior under external fields is crucial for device design.
Purpose of the Study:
- To investigate the contractile buckling dynamics of superparamagnetic filaments.
- To analyze the influence of magnetic fields and hydrodynamic drag on filament behavior.
Main Methods:
- Experimental observations of filament buckling.
- Theoretical modeling of magnetic and elastic forces.
- Computational simulations to capture complex dynamics.
Main Results:
- Identified three distinct stages of buckling: initiation, development, and decay.
- Demonstrated that hydrodynamic drag is dominant during the development stage.
- Observed nonlinear dynamics along the filament contour due to drag.
Conclusions:
- The contractile buckling of magnetic filaments is a multi-stage process.
- Hydrodynamic drag plays a critical role in the transient, nonlinear dynamics observed.
- Filament contraction is influenced by a complex interplay of forces.
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