Final fate of a Leidenfrost droplet: Explosion or takeoff - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science Advances Année : 2019

Final fate of a Leidenfrost droplet: Explosion or takeoff

Sijia Lyu
  • Fonction : Auteur
Varghese Mathai
  • Fonction : Auteur
Yujie Wang
  • Fonction : Auteur
Benjamin Sobac
Detlef Lohse
  • Fonction : Auteur
  • PersonId : 921300
Chao Sun
  • Fonction : Auteur

Résumé

When a liquid droplet is placed on a very hot solid, it levitates on its own vapor layer, a phenomenon called the Leidenfrost effect. Although the mechanisms governing the droplet's levitation have been explored, not much is known about the fate of the Leidenfrost droplet. Here we report on the final stages of evaporation of Leidenfrost droplets. While initially small droplets tend to take off, unexpectedly, the initially large ones explode with a crack sound. We interpret these in the context of unavoidable droplet contaminants, which accumulate at the dropletair interface, resulting in reduced evaporation rate, and contact with the substrate. We validate this hypothesis by introducing controlled amounts of microparticles and reveal a universal 1/3-scaling law for the dimensionless explosion radius versus contaminant fraction. Our findings open up new opportunities for controlling the duration and rate of Leidenfrost heat transfer and propulsion by tuning the droplet's size and contamination.
Fichier principal
Vignette du fichier
2019 Lyu_SciAdv.pdf (980.65 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03857546 , version 1 (17-11-2022)

Identifiants

  • HAL Id : hal-03857546 , version 1

Citer

Sijia Lyu, Varghese Mathai, Yujie Wang, Benjamin Sobac, Pierre Colinet, et al.. Final fate of a Leidenfrost droplet: Explosion or takeoff. Science Advances , 2019. ⟨hal-03857546⟩
5 Consultations
5 Téléchargements

Partager

Gmail Facebook X LinkedIn More