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Accueil > Publications > Archives 2004-2010 > 2008

Spatiotemporal instability of a confined capillary jet

Herrada M. A., M. Gañan-Calvo, P. Guillot

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Recent experimental studies on the instability of capillary jets have revealed the suitability of a linear
spatiotemporal instability analysis to ascertain the parametrical conditions for specific flow regimes such as
steady jetting or dripping. In this work, an extensive analytical, numerical, and experimental description of
confined capillary jets is provided, leading to an integrated picture both in terms of data and interpretation. We
propose an extended, accurate analytic model in the low Reynolds number limit, and introduce a numerical
scheme to predict the system response when the liquid inertia is not negligible. Theoretical predictions show
remarkable accuracy when compared with the extensive experimental mapping.