Phase diagram for droplet impact on superheated surfaces

Hendrik J.J. Staat, Tuan Tran, Bart Geerdink, Guillaume Riboux, Chao Sun, José Manuel Gordillo, Detlef Lohse*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

97 Citations (Scopus)
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We experimentally determine the phase diagram for impacting ethanol droplets on a smooth, sapphire surface in the parameter space of Weber number We versus surface temperature T. We observe two transitions, namely the one towards splashing (disintegration of the droplet) with increasing We, and the one towards the Leidenfrost state (no contact between the droplet and the plate due to a lasting vapour film) with increasing T. Consequently, there are four regimes: contact and no splashing (deposition regime), contact and splashing (contact-splash regime), neither contact nor splashing (bounce regime), and finally no contact, but splashing (film-splash regime). While the transition temperature TL to the Leidenfrost state depends weakly, at most, on We in the parameter regime of the present study, the transition Weber number WeC towards splashing shows a strong dependence T on and a discontinuity at TL. We quantitatively explain the splashing transition for T < TL by incorporating the temperature dependence of the physical properties in the theory by Riboux & Gordillo (Phys. Rev. Lett., vol. 113(2), 2014, 024507; J. Fluid Mech., vol. 772, 2015, pp. 630-648).

Original languageEnglish
Article numberR3
Pages (from-to)R3-1-R3-11
Number of pages12
JournalJournal of fluid mechanics
Publication statusPublished - 21 Aug 2015


  • Boiling
  • Drops
  • Drops and bubbles
  • 2023 OA procedure


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