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

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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