This animation shows the impact of water drops on the surface of granular particles.
The high-speed photography reveals the detailed liquid-drop impact dynamics at various impact velocities. When a granular material is impacted by a sphere, its surface deforms like a liquid yet it preserves a circular crater like a solid.
Liquid-drop impact cratering follows the same energy scaling and reproduces the same crater morphology as that of catastrophic asteroid impact cratering.
Video source: https://www.youtube.com/watch?v=bmRYYeIqT3w
Video credit: R. Zhao et al.
#physics #fluiddynamics #science
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