Direct Self-Sustained Fragmentation Cascade of Reactive Droplets

Chihiro Inoue, Yu Ichiro Izato, Atsumi Miyake, Emmanuel Villermaux

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A traditional hand-held firework generates light streaks similar to branched pine needles, with ever smaller ramifications. These streaks are the trajectories of incandescent reactive liquid droplets bursting from a melted powder. We have uncovered the detailed sequence of events, which involve a chemical reaction with the oxygen of air, thermal decomposition of metastable compounds in the melt, gas bubble nucleation and bursting, liquid ligaments and droplets formation, all occurring in a sequential fashion. We have also evidenced a rare instance in nature of a spontaneous fragmentation process involving a direct cascade from big to smaller droplets. Here, the self-sustained direct cascade is shown to proceed over up to eight generations, with well-defined time and length scales, thus answering a century old question, and enriching, with a new example, the phenomenology of comminution.

Original languageEnglish
Article number074502
JournalPhysical Review Letters
Volume118
Issue number7
DOIs
Publication statusPublished - Feb 14 2017

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cascades
fragmentation
pyrotechnics
ligaments
comminution
liquids
phenomenology
needles
thermal decomposition
chemical reactions
bubbles
trajectories
nucleation
air
oxygen
gases

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Direct Self-Sustained Fragmentation Cascade of Reactive Droplets. / Inoue, Chihiro; Izato, Yu Ichiro; Miyake, Atsumi; Villermaux, Emmanuel.

In: Physical Review Letters, Vol. 118, No. 7, 074502, 14.02.2017.

Research output: Contribution to journalArticle

Inoue, Chihiro ; Izato, Yu Ichiro ; Miyake, Atsumi ; Villermaux, Emmanuel. / Direct Self-Sustained Fragmentation Cascade of Reactive Droplets. In: Physical Review Letters. 2017 ; Vol. 118, No. 7.
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