Physics of Fluids - Publications

Raindrop impact on sand: a dynamic explanation of crater morphologies

arΧiv
Soft Matter 11, 6562 – 6568 (2015)
See also: Inside cover of that page

Authors

	SongChuan Zhao
	Rianne de Jong
	Devaraj van der Meer

BibTeΧ

@Article{C5SM00957J,
author ="Zhao, Song-Chuan and de Jong, Rianne and van der Meer, Devaraj",
title  ="Raindrop impact on sand: a dynamic explanation of crater morphologies",
journal  ="Soft Matter",
year  ="2015",
volume  ="11",
issue  ="33",
pages  ="6562-6568",
publisher  ="The Royal Society of Chemistry",
doi  ="10.1039/C5SM00957J",
url  ="http://dx.doi.org/10.1039/C5SM00957J",
abstract  ="As a droplet impacts upon a granular substrate{,} both the intruder and the target undergo deformation{,} during which the liquid may penetrate into the substrate. These three aspects together distinguish it from other impact phenomena in the literature. We perform high-speed{,} double-laser profilometry measurements and disentangle the dynamics into three aspects: the deformation of the substrate during the impact{,} the maximum spreading diameter of the droplet{,} and the penetration of the liquid into the substrate. By systematically varying the impact speed and the packing fraction of the substrate{,} (i) the substrate deformation indicates a critical packing fraction [curly or open phi]* [approximate] 0.585; (ii) the maximum droplet spreading diameter is found to scale with a Weber number corrected by the substrate deformation; and (iii) a model of the liquid penetration is established and is used to explain the observed crater morphology transition."}