Monday, December 8, 2014

RAINDROP IMPACT ON A SANDY SURFACE


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.

Paper: http://arxiv.org/ftp/arxiv/papers/1407/1407.7420.pdf
Video source: 
https://www.youtube.com/watch?v=bmRYYeIqT3w
Video credit: R. Zhao et al.

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