Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations

The instability of surface lenticular vortices is investigated using a comprehensive suite of laboratory experiments combined with numerical linear stability analysis as well as nonlinear numerical simulations in a two-layer Rotating Shallow Water model. The development of instabilities is discussed...

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Autores principales:	Noé Lahaye, Alexandre Paci, Stefan G. Llewellyn Smith
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	vortex instability ocean eddies numerical simulations laboratory experiments Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/44b2f870fbe54577aaa0a10f4438ce80
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id	oai:doaj.org-article:44b2f870fbe54577aaa0a10f4438ce80
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spelling	oai:doaj.org-article:44b2f870fbe54577aaa0a10f4438ce802021-11-25T17:31:26ZInstability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations10.3390/fluids61103802311-5521https://doaj.org/article/44b2f870fbe54577aaa0a10f4438ce802021-10-01T00:00:00Zhttps://www.mdpi.com/2311-5521/6/11/380https://doaj.org/toc/2311-5521The instability of surface lenticular vortices is investigated using a comprehensive suite of laboratory experiments combined with numerical linear stability analysis as well as nonlinear numerical simulations in a two-layer Rotating Shallow Water model. The development of instabilities is discussed and compared between the different methods. The linear stability analysis allows for a clear description of the origin of the instability observed in both the laboratory experiments and numerical simulations. While global qualitative agreement is found, some discrepancies are observed and discussed. Our study highlights that the sensitivity of the instability outcome is related to the initial condition and the lower-layer flow. The inhibition or even suppression of some unstable modes may be explained in terms of the lower-layer potential vorticity profile.Noé LahayeAlexandre PaciStefan G. Llewellyn SmithMDPI AGarticlevortexinstabilityocean eddiesnumerical simulationslaboratory experimentsThermodynamicsQC310.15-319Descriptive and experimental mechanicsQC120-168.85ENFluids, Vol 6, Iss 380, p 380 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	vortex instability ocean eddies numerical simulations laboratory experiments Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
spellingShingle	vortex instability ocean eddies numerical simulations laboratory experiments Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85 Noé Lahaye Alexandre Paci Stefan G. Llewellyn Smith Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
description	The instability of surface lenticular vortices is investigated using a comprehensive suite of laboratory experiments combined with numerical linear stability analysis as well as nonlinear numerical simulations in a two-layer Rotating Shallow Water model. The development of instabilities is discussed and compared between the different methods. The linear stability analysis allows for a clear description of the origin of the instability observed in both the laboratory experiments and numerical simulations. While global qualitative agreement is found, some discrepancies are observed and discussed. Our study highlights that the sensitivity of the instability outcome is related to the initial condition and the lower-layer flow. The inhibition or even suppression of some unstable modes may be explained in terms of the lower-layer potential vorticity profile.
format	article
author	Noé Lahaye Alexandre Paci Stefan G. Llewellyn Smith
author_facet	Noé Lahaye Alexandre Paci Stefan G. Llewellyn Smith
author_sort	Noé Lahaye
title	Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
title_short	Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
title_full	Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
title_fullStr	Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
title_full_unstemmed	Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations
title_sort	instability of lenticular vortices: results from laboratory experiments, linear stability analysis and numerical simulations
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/44b2f870fbe54577aaa0a10f4438ce80
work_keys_str_mv	AT noelahaye instabilityoflenticularvorticesresultsfromlaboratoryexperimentslinearstabilityanalysisandnumericalsimulations AT alexandrepaci instabilityoflenticularvorticesresultsfromlaboratoryexperimentslinearstabilityanalysisandnumericalsimulations AT stefangllewellynsmith instabilityoflenticularvorticesresultsfromlaboratoryexperimentslinearstabilityanalysisandnumericalsimulations
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Instability of Lenticular Vortices: Results from Laboratory Experiments, Linear Stability Analysis and Numerical Simulations

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