Fingering patterns during droplet impact on heated surfaces

M. Khavari, Chao Sun, Detlef Lohse, Tuan Tran

Research output: Contribution to journalArticleAcademicpeer-review

62 Citations (Scopus)

Abstract

A droplet impinging on a sufficiently heated surfacemay be cushioned by its own vapor and never touch the surface. In previous work, the transition to this so-called Leidenfrost regime was only qualitatively described as an abrupt change between the “contact-boiling” regime, which is characterized by violent boiling behaviors, and the Leidenfrost state. We reveal that the wetted area can be used as a quantity that quantitatively characterizes this transition and it is a continuous function of surface temperature up to the Leidenfrost regime. The wetted area exhibits fingering patterns caused by vapor flow under the liquid. This underlines the crucial role of vapor transport in the Leidenfrost transition and unveils the physical mechanism of the transition to the Leidenfrost regime.
Original languageEnglish
Pages (from-to)3298-3303
Number of pages6
JournalSoft matter
Volume11
Issue number17
DOIs
Publication statusPublished - 2015

Keywords

  • IR-96684
  • METIS-310472

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