67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0021: Leidenfrost state of a drop above a heated liquid pool: Mass entrainment & emulsification

  • Mathias Dietzel, Center of Smart Interfaces, TU Darmstadt
  • Saman Afkhami Meibodi, Center of Smart Interfaces, TU Darmstadt
  • Steffen Hardt, Center of Smart Interfaces, TU Darmstadt
DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0021

The well-known Leidenfrost phenomenon commonly refers to a liquid droplet hovering on a thin layer of its own vapor when placed on a hot solid plate. In a series of video clips we show the deposition and the Leidenfrost state of an acetone drop on top of a heated liquid pool. It is illustrated that -depending on the choice of the pool liquid- direct contact between the acetone drop and the surface of the pool liquid may occur during the initial impact stage, leading to violent acetone evaporation and partial emulsification of the pool liquid inside the remaining acetone drop.

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