Referenzen
- Vorführexperimente, Videos
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Slow-motion Footage of Objects Falling in Water
various rings and plates fall into the water in slow motion
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Slow-Mo Universe
Playlist with various rings falling into the water in slow motion
https://www.youtube.com/watch?v=MvFlrUQVK70&list=PLvg-ALxoY7IA696jJuy7IbmgvgD9YOj0I&index=2
- Wissenschaftliche Artikel
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Controlled impact of a disk on a water surface: Cavity dynamics
They study the transient surface cavity which is created by the controlled impact of a disk on a water surface. The dynamics of the transient free surface is recorded by high speed imaging and compared to boundary integral simulations. An excellent agreement is found between both. The flow surrounding the cavity is measured with high speed particle image velocimetry and is found to also agree perfectly with the flow field obtained from the simulations. They present a simple model for the radial dynamics of the cavity based on the collapse of an infinite cylinder.
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Giant Bubble Pinch-Off
The paper investigates how a disk pulled rapidly through the water surface creates a large air-filled cavity (‘giant bubble’), which collapses in a pinch-off that drives a vertical jet. The authors analyze the cavity dynamics and visualize the process with high-speed imaging.
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High-speed Jet Formation after Solid Object Impact
The paper investigates how the collapse of an air cavity, formed when a disk impacts a liquid surface, produces upward and downward high-speed jets. The authors show through simulations that the jets are powered by fluid flow from the collapsing cavity walls, and they develop a simplified theoretical model that quantitatively captures the jetting process.
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Splash wave and crown breakup after disc impact on a liquid surface
In this paper they analyse the impact of a circular disc on a free surface using experiments, potential flow numerical simulations and theory. They focus both on the study of the generation and possible breakup of the splash wave created after the impact and on the calculation of the force on the disc.