78th Annual Meeting of the APS Division of Fluid Dynamics (Nov 23 — 25, 2025)

P023: Jet Coronation

Authors
  • Hiroya Watanabe, Tokyo University of Agriculture and Technology, Imperial College London
  • Kotaro Hashimoto , Tokyo University of Agriculture and Technology
  • William K. Worby , Tokyo University of Agriculture and Technology
  • Akihito Kiyama , Saitama University
  • Lyes Kahouadji Dr, Imperial College London
  • Omar K. Matar , Imperial College London
  • Yoshiyuki Tagawa , Tokyo University of Agriculture and Technology

When a liquid-filled test tube is dropped onto a solid surface, the impact generates a pressure wave at the container bottom, which then propagates to the concave gas-liquid interface and produces a focused liquid jet (left). Cavitation bubbles can form in the bulk liquid only under strong impacts. When the pressure waves generated by the collapse of these bubbles reach the interface, sheet-like jets emerge from the jet root (left and center). As the sheet-like jets extend, interfacial instability develops along their edges, giving rise to crown-like structures (center and right). With a weak impact, the jet cannot wear a crown.

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