Atomization of an undulating liquid sheet

Nicolas P. Bremond, Christophe Clanet, Emmanuel Villermaux

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This paper presents an experimental study devoted to the understanding of break-up mechanisms of liquid sheets. The studied sheet is formed by the normal collision of a round jet on a solid rod which can oscillates vertically. The liquid expands radially in air initially at rest. A shear instability develops at the interface liquid/gas resulting in an undulated motion of the liquid sheet. Because of the velocity contrast between the liquid and the surface waves, the liquid is submitted to transient accelerations as it moves through the undulations. This situation trigs a Rayleigh-Taylor instability leading to azimuthal thickness modulations. The thickness profile governs the free rim shape and therefore the drops formation. A model including the development of both instabilities allows us to predict the sheet and drops sizes.
Original languageEnglish
Title of host publicationMechanics of the 21st Century
Subtitle of host publicationProceedings of the 21st International Congress of Theoretical and Applied Mechanics, Warsaw, Poland, 15-21 August 2004
EditorsTomasz A. Kowalewski, Witold Gutkowski
Number of pages2
ISBN (Electronic)978-1-4020-3559-3
ISBN (Print)978-94-007-8907-4
Publication statusPublished - 16 Aug 2004
EventXXI International Congress of Theoretical and Applied Mechanics, ICTAM 2004 - Warsaw, Poland
Duration: 15 Aug 200421 Aug 2004
Conference number: 21


ConferenceXXI International Congress of Theoretical and Applied Mechanics, ICTAM 2004
Abbreviated titleICTAM


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