Decomposition of time-resolved tomographic PIV

Abstract : An experimental study has been conducted on a transitional water jet at a Reynolds number of Re = 5,000. Flow fields have been obtained by means of time-resolved tomographic particle image velocimetry capturing all relevant spatial and temporal scales. The measured three-dimensional flow fields have then been postprocessed by the dynamic mode decomposition which identifies coherent structures that contribute significantly to the dynamics of the jet. Both temporal and spatial analyses have been performed. Where the jet exhibits a primary axisymmetric instability followed by a pairing of the vortex rings, dominant dynamic modes have been extracted together with their amplitude distribution. These modes represent a basis for the low-dimensional description of the dominant flow features. © 2012 Springer-Verlag.
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Experiments in Fluids, Springer Verlag (Germany), 2012, 52 (6), pp.1567-1579. 〈10.1007/s00348-012-1266-8〉
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Soumis le : lundi 26 mai 2014 - 14:40:22
Dernière modification le : jeudi 10 mai 2018 - 02:02:32

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Peter Schmid, D. Violato, Fulvio Scarano. Decomposition of time-resolved tomographic PIV. Experiments in Fluids, Springer Verlag (Germany), 2012, 52 (6), pp.1567-1579. 〈10.1007/s00348-012-1266-8〉. 〈hal-00994473〉

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