Crossover between Rayleigh-Taylor instability and turbulent cascading atomization mechanism in the bag-breakup regime - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2011

Crossover between Rayleigh-Taylor instability and turbulent cascading atomization mechanism in the bag-breakup regime

Résumé

The question of whether liquid atomization depends on instability dynamics (through refinements of Rayleigh-Plateau, Rayleigh-Taylor, or Kelvin-Helmholtz mechanisms) or on turbulent cascades, as suggested by Richardson and Kolmogorov, is still open. In this paper, experimental results reveal that both mechanisms are needed to explain the probability density functions (PDFs) of the droplets in a spray obtained from an industrial fan spray nozzle. Instability of Rayleigh-Taylor type controls the size of the largest droplets while the smallest droplets follow a PDF given by a turbulent cascading mechanism characterized by a log-Lévy stable law that has a stability parameter equal to 1.70. This value is very close to the inverse value of the Flory exponent and can be related to a recent model developed by N. Rimbert for intermittency modeling stemming from self-avoiding random vortex stretching.
Fichier principal
Vignette du fichier
rimbert2011.pdf (604.39 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01570432 , version 1 (30-07-2017)

Identifiants

Citer

Nicolas Rimbert, Guillaume Castanet. Crossover between Rayleigh-Taylor instability and turbulent cascading atomization mechanism in the bag-breakup regime. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2011, 84 (1), pp.2381 - 2381. ⟨10.1103/PhysRevE.84.016318⟩. ⟨hal-01570432⟩
70 Consultations
192 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More