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Experimental observation of the straining field responsible for vortex ring instability

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2004
auteur(s) Dazin Antoine; Dupont Patrick; Stanislas Michel
journal (abréviation) Compte-Rendus Mécanique (C.R. Mécanique)
volume (numéro) 332 (3)
  
pages 231 – 236
résumé The aim of this work experimentally the straining field responsible for the vortex ring instability. To do so, the velocity field in the neighbourhood of the core is measured with Particle Image Velocimetry. This field is compared with the one coming from theoretical work on a thin vortex ring in an ideal fluid. Theoretical and experimental data fit well. This indicates that the linear phase of the instability is weakly influenced by viscosity.
mots clés Fluid mechanics; Vortex ring instability; Particle Image Velocimetry
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