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

P013: ENOKI JETS​

Authors
  • Lyes Kahouadji, Imperial College London
  • Lyes Kahouadji Dr, Imperial College London
  • Debashis Panda , Imperial College London
  • Seungwon Shin , Hongik University
  • Damir Juric , Université Paris Saclay, Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire des Sciences du Numérique (LISN), 91400 Orsay, France
  • Jalel Chergui , CNRS
  • Omar K. Matar , Imperial College London

We investigate the vertical impact of a flat perforated disc on a thin liquid film using Code Blue, a high-resolution CFD framework combining the Fictitious Domain Method and Level Contour Reconstruction Method. Simulations reveal the early-time dynamics: liquid is expelled through the perforations as slender jets with bulbous tips that undergo pinch-off, while a shallow splash crown emerges at the rim. The morphology strikingly resembles an enoki mushroom bouquet-dense upward jets capped with droplets-marking the onset of atomization. Results demonstrate how disc perforations strongly influence jetting, crown formation, and overall multiphase impact dynamics.

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