Decomposition of time-resolved tomographic PIV

Peter J. Schmid, Daniele Violato, Fulvio Scarano

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

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 threedimensional 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. © Springer-Verlag 2012.
Original languageEnglish (US)
Pages (from-to)1567-1579
Number of pages13
JournalExperiments in Fluids
Volume52
Issue number6
DOIs
StatePublished - Jun 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes

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