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Analysis of the wake-mixing layer interaction using Multiple plane PIV and 3D Classical POD.

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2004
auteur(s) Braud Caroline; Heitz Dominique; Braud Patrick; Arroyo George; Delville Joel
journal (abréviation) Experiment in fluids (EIF)
volume (numéro) 37
pages 95 – 104
résumé The strong interaction between turbulent structures arising from a plane mixing layer impinging on a circular cylinder is studied. This complex flow has been investigated by a set-up called dual-plane PIV that uses two 2D PIV (two-dimensional particle image velocimetry) planes acquired simultaneously. This approach allowed us to apply a 3D-POD (three-dimensional proper orthogonal decomposition) treatment. The first POD modes show the main footprint of the flow configuration, which comprises oblique structures associated with the action of the mixing layer on the near wake. The present study suggests, by analogy, that this phenomenon behaves like the dislocation observed in uniform wake flows.
mots clés 3D POD, Dual plane PIV, mixing-layer wake interaction, dislocation
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