The influence of droplet shape on maximum cavity depth and singular jet velocity during the impact of ferrofluid

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At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis will become available to the public after the expiration of the embargo on 2023-12-15.

Abstract
This thesis studies a droplet of ferrofluid impacting a liquid water pool. The ferrofluid is oil-based and therefore immersible in water. The shape of the ferrofluid drop at impact is changed by using an electromagnet underneath the liquid pool. The magnet is turned off by an external trigger just before the drop collides with the liquid pool surface, to stop the magnetic interaction. The prolate or oblate shape of the drop has an influence on the cavity formation and evolution after the impact. The experiments look specifically at the maximum depth and diameter of the cavity, as a function of the drop impact shape for the same impact velocity. This is done over a range of impact velocities. The prolate drops generate deeper cavities than spherical or oblate drops. Furthermore, a study is conducted on the jet formation that occurs during the cavity collapse to investigate the influence of droplet shape on the jet velocity.

Citation
Kattoah, M. (2022). The influence of droplet shape on maximum cavity depth and singular jet velocity during the impact of ferrofluid [KAUST Research Repository]. https://doi.org/10.25781/KAUST-8R4C0

DOI
10.25781/KAUST-8R4C0

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