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Resolvent-based analysis of streaks in turbulent jets

Nogueira, Petrônio A. S. and Cavalieri, André V. G. and Schmidt, Oliver T. and Jordan, Peter and Jaunet, Vincent and Pickering, Ethan and Rigas, Georgios and Colonius, Tim (2019) Resolvent-based analysis of streaks in turbulent jets. In: 25th AIAA/CEAS Aeroacoustics Conference, 20-23 May 2019, Delft, Netherlands.

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Large scale, elongated structures, similar those ones widely studied in wall-bounded flows, are also present in turbulent jets. Several characteristics of these streaks can be identified via reduced order models such as resolvent analysis. The present work involves a resolvent-based study of these structures in turbulent jets. We focus on obtaining the optimal forcing that generates these energetic coherent structures. Results are compared with experimental data post-processed using spectral proper orthogonal decomposition, allowing us to draw conclusions about the nature of the non-linear forcing, since the two analyses should provide equivalent results if this term is modelled as spatially white. By identifying streaks in a global framework, we expect to better understand the mechanism by which they are generated.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Paper Paper
Cavalieri, André V. G.0000-0003-4283-0232
Schmidt, Oliver T.0000-0002-7097-0235
Jordan, Peter0000-0001-8576-5587
Pickering, Ethan0000-0002-4485-6359
Rigas, Georgios0000-0001-6692-6437
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2019 by Petrônio Nogueira, André Cavalieri, Oliver Schmidt, Peter Jordan, Vincent Jaunet, Ethan Pickering, Georgios Rigas, Tim Colonius. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 18 May 2019. Petrônio Nogueira was funded by a CNPq scholarship. André Cavalieri acknowledges financial support by CNPq (grant number 310523/2017-6). This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.
Funding AgencyGrant Number
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)310523/2017-6
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)001
Subject Keywords:Aeroacoustics
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2019-2569
Record Number:CaltechAUTHORS:20190709-092102671
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96983
Deposited By: Melissa Ray
Deposited On:12 Jul 2019 17:10
Last Modified:16 Nov 2021 17:25

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