Ejecta evolution during cone impact

J. O. Marston, S. T. Thoroddsen

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We present findings from an experimental investigation into the impact of solid cone-shaped bodies onto liquid pools. Using a variety of cone angles and liquid physical properties, we show that the ejecta formed during the impact exhibits self-similarity for all impact speeds for very low surface tension liquids, whilst for high-surface tension liquids similarity is only achieved at high impact speeds. We find that the ejecta tip can detach from the cone and that this phenomenon can be attributed to the air entrainment phenomenon. We analyse of a range of cone angles, including some ogive cones, and impact speeds in terms of the spatiotemporal evolution of the ejecta tip. Using superhydrophobic cones, we also examine the entry of cones which entrain an air layer.

Original languageEnglish
Pages (from-to)410-438
Number of pages29
JournalJournal of Fluid Mechanics
Volume752
Issue number3
DOIs
StatePublished - Aug 10 2014

Keywords

  • contact lines
  • interfacial flows (free surface)
  • jets

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