Resolvent-based analysis of streaks in turbulent jets

Petrônio A.S. Nogueira, André V.G. Cavalieri, Oliver T. Schmidt, Peter Jordan, Vincent Jaunet, Ethan Pickering, Georgios Rigas, Tim Colonius

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

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.

Original languageEnglish
Title of host publication25th AIAA/CEAS Aeroacoustics Conference, 2019
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)9781624105883
DOIs
Publication statusPublished - 2018
Externally publishedYes
EventAIAA/CEAS Aeroacoustics Conference 2019 - Delft, Netherlands
Duration: 20 May 201923 May 2019
Conference number: 25th
https://arc.aiaa.org/doi/book/10.2514/MAERO19

Publication series

Name25th AIAA/CEAS Aeroacoustics Conference, 2019

Conference

ConferenceAIAA/CEAS Aeroacoustics Conference 2019
CountryNetherlands
CityDelft
Period20/05/1923/05/19
Internet address

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