Decomposition of time-resolved tomographic PIV

Peter J. Schmid; Daniele Violato; Fulvio Scarano

doi:10.1007/s00348-012-1266-8

Decomposition of time-resolved tomographic PIV

Peter J. Schmid, Daniele Violato, Fulvio Scarano

Research output: Contribution to journal › Article › peer-review

124 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 language	English (US)
Pages (from-to)	1567-1579
Number of pages	13
Journal	Experiments in Fluids
Volume	52
Issue number	6
DOIs	https://doi.org/10.1007/s00348-012-1266-8
State	Published - Jun 1 2012
Externally published	Yes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

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

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10.1007/s00348-012-1266-8

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AU - Scarano, Fulvio

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AB - 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.

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Decomposition of time-resolved tomographic PIV

Abstract

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ASJC Scopus subject areas

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