Granular impact cratering by liquid drops: Understanding raindrop imprints through an analogy to asteroid strikes
arXiv:1407.7420 · doi:10.1073/pnas.1419271112
Abstract
When a granular material is impacted by a sphere, its surface deforms like a liquid yet it preserves a circular crater like a solid. Although the mechanism of granular impact cratering by solid spheres is well explored, our knowledge on granular impact cratering by liquid drops is still very limited. Here, by combining high-speed photography with high-precision laser profilometry, we investigate liquid-drop impact dynamics on granular surface and monitor the morphology of resulting impact craters. Surprisingly, we find that, despite the enormous energy and length difference, granular impact cratering by liquid drops follows the same energy scaling and reproduces the same crater morphology as that of asteroid impact craters. Inspired by this similarity, we integrate the physical insight from planetary sciences, the liquid marble model from fluid mechanics and the concept of jamming transition from granular physics into a simple theoretical framework that quantitatively describes all the main features of liquid-drop imprints in granular media. Our study sheds light on the mechanisms governing raindrop impacts on granular surfaces and reveals a remarkable analogy between familiar phenomena of raining and catastrophic asteroid strikes.
arXiv comment6 pages, 6 figures, Proceedings of the National Academy of Sciences (2015)
References in corpus (9)
- A constitutive law for dense granular flows
- Drop Splashing on a Dry Smooth Surface
- Unified force law for granular impact cratering
- Low-speed impact craters in loose granular media
- Skating on a Film of Air: Drops Impacting on a Surface
- Morphology Scaling of Drop Impact onto a Granular Layer
- Granular Dynamics during Impact
- Experimental study of the jamming transition at zero temperature
- Shock driven jamming and periodic fracture of particulate rafts
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- Liquid-grain mixing suppresses droplet spreading and splashing during impact
- Scaling of liquid-drop impact craters in wet granular media
- Crater formation during raindrop impact on sand
- Scaling laws for the oblique impact cratering on an inclined granular surface
- Impact cratering in sand: Comparing solid and liquid intruders
- Viscous-like forces control the impact response of shear-thickening dense suspensions
- Drop impact on wet granular beds: water-content effects on the cratering
- Free surface topography of capillary flows using spatiotemporal phase shifting profilometry
- Hydrogel sphere impact cratering, spreading and bouncing on granular media