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Atomization and Sprays
Facteur d'impact: 1.262 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v8.i2.50
pages 217-233

ULTRASONIC ATOMIZATION OF LIQUIDS: STABILITY ANALYSIS OF THE VISCOUS LIQUID FILM FREE SURFACE

Daniel Sindayihebura
Department of Mechanical Engineering, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
Leon Bolle
Department of Mechanical Engineering, Université Catholique de Louvain, Louvain-la-Neuve, Belgium

RÉSUMÉ

One of the fundamental steps in the process of liquid film ultrasonic atomization is the hydrodynamic instability. The resulting surface waves become unstable and tear. This causes a mist of uniform droplets to be formed and ejected. The study of ideal liquid film free surface behavior in the steps prior to droplet formation leads to a stability analysis based on the Mathieu-Hill equation. Unfortunately, a similar analysis cannot realistically be developed for a viscous liquid. The present work performs a linear analysis derived from the hydrodynamics, which allows a stability analysis of viscous bounded liquid film free surface. Actual results are compared to those obtained in the case of an inviscid fluid.


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