Raindrop impact on sand: a dynamic explanation of crater morphologies

SongChuan Zhao, Rianne de Jong, Roger M. van der Meer

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)

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]* ≈ 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.
Original languageEnglish
Pages (from-to)6562-6568
Number of pages7
JournalSoft matter
Volume11
Issue number33
DOIs
Publication statusPublished - 22 Jun 2015

Keywords

  • IR-96732
  • METIS-311117

Fingerprint Dive into the research topics of 'Raindrop impact on sand: a dynamic explanation of crater morphologies'. Together they form a unique fingerprint.

  • Cite this