Dynamics of Ferrofluidic Drops Impacting Superhydrophobic Surfaces

Details Dynamics of Ferrofluidic Drops Impacting Superhydrophobic Surfaces Dynamics of Ferrofluidic Drops Impacting Superhydrophobic Surfaces

2010-10-15

arxiv.org/abs/1010.3297v1

Physics

Fluid Dynamics

video included

Scientific paper

This is a fluid dynamics video illustrating the impact of ferrofluidic droplets on surfaces of variable wettability. Surfaces studied include mica, teflon, and superhydrophobic. A magnet is placed beneath each surface, which modifies the behavior of the ferrofluid by applying additional downward force apart from gravity resulting in reduced droplet size and increased droplet velocity. For the superhydrophobic droplet a jetting phenomena is shown which only occurs in a limited range of impact speeds, higher than observed before, followed by amplified oscillation due to magnetic field as the drop stabilizes on the surface.

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