Flow coherent structures and frequency signature: Application of the dynamic modes decomposition to open cavity flow

F. Lusseyran 1 F. Guéniat 1, 2 J. Basley 1, 2, 3 C.L. Douay 1, 4 L.R. Pastur 1, 2 T.M. Faure 1, 4 Peter Schmid 5, *
* Corresponding author
1 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur
2 UP11 - Université Paris-Sud - Paris 11
3 LTRAC, Department of Aerospace and Mechanical Engineering, Monash University, Melbourne, VIC 3800, Australia
4 Université Pierre and Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
5 LadHyX - Laboratoire d'hydrodynamique
Abstract : The dynamic dimension of an impinging flow may be significantly reduced by its boundary conditions and self-sustained oscillations they induce. The spectral signature is associated with remarkable spatial coherent structures. Dynamic modes decomposition (DMD) makes it possible to directly extract the dynamical properties of a non-linearly saturated flow. We apply DMD to highlight the spectral contribution of the longitudinal and transverse structures of an experimental open-cavity flow.
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F. Lusseyran, F. Guéniat, J. Basley, C.L. Douay, L.R. Pastur, et al.. Flow coherent structures and frequency signature: Application of the dynamic modes decomposition to open cavity flow. 13th European Turbulence Conference (ETC13), Sep 2011, Warsaw, Poland. pp.042036, ⟨10.1088/1742-6596/318/4/042036⟩. ⟨hal-01025972⟩

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