The onset of cavitation during the collision of a sphere with a wetted surface

M. M. Mansoor, J. Uddin, J. O. Marston*, I. U. Vakarelski, S. T. Thoroddsen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We investigate the onset of cavitation during the collision of a sphere with a solid surface covered with a layer of Newtonian liquid. The conventional theory dictates cavitation to initiate during depressurization, i.e. when the sphere rebounds from the solid surface. Using synchronized dual-view high-speed imaging, we provide conclusive experimental evidence that confirms this scenario- namely-that cavitation occurs only after the sphere makes initial contact with the solid surface. Similar to previous experimental observations for spheres released above the liquid surface, bubbles are formed on the sphere surface during entry into the liquid layer. These were found to squeeze radially outwards with the liquid flow as the sphere approached the solid surface, producing an annular bubble structure unrelated to cavitation. In contrast, spheres released below the liquid surface did not exhibit these patterns.

Original languageEnglish
Article number1648
Pages (from-to)1-7
Number of pages7
JournalExperiments in Fluids
Volume55
Issue number1
DOIs
Publication statusPublished - 5 Jan 2014

Keywords

  • Cavitation
  • Sphere Surface
  • Approach Stage
  • Squeeze Flow
  • Pressurization Stage

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials

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