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Conference Papers Year : 2010

Decomposition of time-resolved tomographic PIV

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Abstract

An experimental study has been conducted on a transitional water jet at a Reynolds number of Re = 5000. Flow fields have been obtained by means of time-resolved tomographic particle image velocimetry (TR-TOMO PIV) capturing all relevant spatial and temporal scales. The measured three-dimensional flow fields have then been postprocessed by the dynamic mode decomposition (DMD) which identifies coherent structures that contribute significantly to the dynamics of the jet. 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.
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Dates and versions

hal-01052852 , version 1 (28-07-2014)

Identifiers

  • HAL Id : hal-01052852 , version 1

Cite

Peter J. Schmid, D. Violato, O. Pust, F. Scarano. Decomposition of time-resolved tomographic PIV. 15th International Symposium on Applications of Laser Techniques in Fluid Mechanics, Jul 2010, Lisbonne, Portugal. pp.3.7.1. ⟨hal-01052852⟩
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