The sedimentation of flexible filaments: Trajectories, particle clouds
and a buckling instability
- Author(s): Manikantan, Harishankar
- Li, Lei
- Saintillan, David
- Spagnolie, Saverio E
- et al.
In this fluid dynamics video we explore an array of different possible dynamics for a flexible filament sedimenting in a viscous fluid. The time-dependent shapes and trajectories of the filament are determined analytically and numerically by balancing viscous, elastic and gravitational forces in a slender-body theory for zero-Reynolds number flows. The dynamics are characterized by a single dimensionless elasto-gravitation number. The video shows the process of filament relaxation and reorientation, the formation of particle clouds, and finally a buckling instability.
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