TY - JOUR
T1 - Direct Self-Sustained Fragmentation Cascade of Reactive Droplets
AU - Inoue, Chihiro
AU - Izato, Yu Ichiro
AU - Miyake, Atsumi
AU - Villermaux, Emmanuel
N1 - Funding Information:
We acknowledge the financial support of ILASS-Japan, the Foundation for the Promotion of Industrial Explosives Technology, the Japan Society for the Promotion of Science KAKENHI JP15K14246, S15164, and the Agence Nationale de la Recherche for funding of the ANR FISICS No. ANR-15-CE30-0015-03.
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/2/14
Y1 - 2017/2/14
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.118.074502
DO - 10.1103/PhysRevLett.118.074502
M3 - Article
C2 - 28256875
AN - SCOPUS:85013432460
VL - 118
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 7
M1 - 074502
ER -