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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i1-3.20
pages 13-23

Determination of Instability Scales on a Liquid Jet through an Image Analysis Method

S. Adeline
UMR CNRS 6614 - CORIA, Université de Rouen 76821 Mont-Saint-Aignan Cedex - FRANCE
Jean-Bernard Blaisot
University of Rouen
S. Belaid
UMR CNRS 6614 - CORIA, Université de Rouen 76821 Mont-Saint-Aignan Cedex - FRANCE
M. Ledoux
CORIA-UMR CNRS 6614, Universite de Rouen, Site du Madrillet Avenue de l’Universite, BP12 76801 Saint Etienne du Rouvray cedex, France

ABSTRAKT

A study of the perturbation scales growing along a liquid jet interface is presented. Cylindrical gas-oil jets are investigated under different ambient pressures. The jet interface is determined through an image analysis method applied to images of the jet, taken with a very short exposure time. By use of one-dimensional wavelet transform applied to the profile of the interface, several characteristic scales can be obtained. These scales are the wavelength of the perturbation, the magnitude of the perturbation and the curvature scale of the profile. The study of the variation of these scales along the axis of different liquid jets shows noticeable discrepancies to the Rayleigh theory.


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