Wave dispersion in moderate channel turbulence

We study channel turbulence by interpreting its vorticity as a random sea of ocean wave packet analogues. In particular, we investigate the ocean-like properties of vortical packets applying stochastic methods developed for oceanic fields. Taylor’s hypothesis of frozen eddies does not hold when turb...

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Autores principales: Pilloton, Chiara, Lugni, Claudio, Graziani, Giorgio, Fedele, Francesco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10133326/
https://www.ncbi.nlm.nih.gov/pubmed/37100809
http://dx.doi.org/10.1038/s41598-023-32978-7
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author Pilloton, Chiara
Lugni, Claudio
Graziani, Giorgio
Fedele, Francesco
author_facet Pilloton, Chiara
Lugni, Claudio
Graziani, Giorgio
Fedele, Francesco
author_sort Pilloton, Chiara
collection PubMed
description We study channel turbulence by interpreting its vorticity as a random sea of ocean wave packet analogues. In particular, we investigate the ocean-like properties of vortical packets applying stochastic methods developed for oceanic fields. Taylor’s hypothesis of frozen eddies does not hold when turbulence is not weak, and vortical packets change shape as they are advected by the mean flow, altering their own speed. This is the physical manifestation of a hidden wave dispersion of turbulence. Our analysis at the bulk Reynolds number Re(b) = 5600 suggests that turbulent fluctuations behave dispersively as gravity-capillary waves, with capillarity being dominant near the wall region.
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spelling pubmed-101333262023-04-28 Wave dispersion in moderate channel turbulence Pilloton, Chiara Lugni, Claudio Graziani, Giorgio Fedele, Francesco Sci Rep Article We study channel turbulence by interpreting its vorticity as a random sea of ocean wave packet analogues. In particular, we investigate the ocean-like properties of vortical packets applying stochastic methods developed for oceanic fields. Taylor’s hypothesis of frozen eddies does not hold when turbulence is not weak, and vortical packets change shape as they are advected by the mean flow, altering their own speed. This is the physical manifestation of a hidden wave dispersion of turbulence. Our analysis at the bulk Reynolds number Re(b) = 5600 suggests that turbulent fluctuations behave dispersively as gravity-capillary waves, with capillarity being dominant near the wall region. Nature Publishing Group UK 2023-04-26 /pmc/articles/PMC10133326/ /pubmed/37100809 http://dx.doi.org/10.1038/s41598-023-32978-7 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Pilloton, Chiara
Lugni, Claudio
Graziani, Giorgio
Fedele, Francesco
Wave dispersion in moderate channel turbulence
title Wave dispersion in moderate channel turbulence
title_full Wave dispersion in moderate channel turbulence
title_fullStr Wave dispersion in moderate channel turbulence
title_full_unstemmed Wave dispersion in moderate channel turbulence
title_short Wave dispersion in moderate channel turbulence
title_sort wave dispersion in moderate channel turbulence
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10133326/
https://www.ncbi.nlm.nih.gov/pubmed/37100809
http://dx.doi.org/10.1038/s41598-023-32978-7
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