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Higher Order Dynamic Mode Decomposition of an experimental trailing vortex

Gutierrez Castillo, Paloma and Garrido-Martin, Manuel and Bölle, Tobias and García-Ortiz, Jose Hermenegildo and Aguilar-Cabello, Jorge and del Pino, Carlos (2022) Higher Order Dynamic Mode Decomposition of an experimental trailing vortex. Physics of Fluids, pp. 1-18. American Institute of Physics (AIP). doi: 10.1063/5.0117611. ISSN 1070-6631.

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Official URL: https://aip.scitation.org/doi/full/10.1063/5.0117611


The decay of trailing vortices is a fundamental problem in fluid mechanics and constitutes the basis of control applications that intend to alleviate the wake hazard. In order to progress, we use the recently developed modal-decomposition technique to identify the governing dynamics in an experimental trailing vortex. A particular emphasis is on the difficulty and usefulness of applying such tools to noisy experimental data. We conducted a water-tunnel experiment at a chord-based Reynolds number Re = 4 x 10^4 using stereoscopic particle image velocimetry measurements over a downstream range of 36 chords. The downstream evolution of the maximum of vorticity suggests that the whole wake can be partitioned into three consecutive regimes. A higher-order dynamic mode decomposition of the streamwise vorticity in each such part of the wake shows that the decay is well approximated by at most three modes. Additionally, our study provides evidence for the existence of several instabilities after the vortex roll up beyond about 6.5 chords.

Item URL in elib:https://elib.dlr.de/190012/
Document Type:Article
Title:Higher Order Dynamic Mode Decomposition of an experimental trailing vortex
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gutierrez Castillo, PalomaUniversidad de MálagaUNSPECIFIEDUNSPECIFIED
Garrido-Martin, ManuelUniversidad de MálagaUNSPECIFIEDUNSPECIFIED
García-Ortiz, Jose HermenegildoUniversidad de CádizUNSPECIFIEDUNSPECIFIED
Aguilar-Cabello, JorgeUniversidad de MálagaUNSPECIFIEDUNSPECIFIED
del Pino, CarlosUniversidad de MálagaUNSPECIFIEDUNSPECIFIED
Date:24 September 2022
Journal or Publication Title:Physics of Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-18
Publisher:American Institute of Physics (AIP)
Keywords:Wirbeldynamik, dynamische Modenzerlegung
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Air Transportation and Impact
DLR - Research area:Aeronautics
DLR - Program:L AI - Air Transportation and Impact
DLR - Research theme (Project):L - Air Transport Operations and Impact Assessment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Bölle, Tobias
Deposited On:11 Nov 2022 13:19
Last Modified:29 Nov 2023 14:55

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