Extra Strain Rates in an unsteady spilling breaking wave

Abstract We analyze the extra strain rates that characterize a curved, thin mixing layer induced at an unsteady spilling breaker. We focus on the flow curvature, which induces some extra rates of strain that should be accounted for in algebraic-type turbulence closures. The comparison between the an...

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Autores principales:	Alessia Lucarelli, Claudio Lugni, Massimo Falchi, Mario Felli, Maurizio Brocchini
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Extra Strain Rate Spilling Breaker Streamline Curvature Geometric Curvature Hydraulic Jumps Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f63703b5eeb246bb98ed4b4037657e33
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id	oai:doaj.org-article:f63703b5eeb246bb98ed4b4037657e33
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spelling	oai:doaj.org-article:f63703b5eeb246bb98ed4b4037657e332021-12-02T15:08:04ZExtra Strain Rates in an unsteady spilling breaking wave10.1038/s41598-018-32307-32045-2322https://doaj.org/article/f63703b5eeb246bb98ed4b4037657e332018-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-32307-3https://doaj.org/toc/2045-2322Abstract We analyze the extra strain rates that characterize a curved, thin mixing layer induced at an unsteady spilling breaker. We focus on the flow curvature, which induces some extra rates of strain that should be accounted for in algebraic-type turbulence closures. The comparison between the analytical formulation proposed by Brocchini and co-workers for a single-phase turbulent thin layer of fluid and the data, obtained from a Particle Image Velocimetry (PIV) dedicated experimental program, reveals that the order of magnitude of the extra rates of strain induced by the streamline curvature, is comparable with that of the simple shear. This differs from what observed for the geometric curvature terms and from what occurs at hydraulic jumps, typically used to model steady breakers.Alessia LucarelliClaudio LugniMassimo FalchiMario FelliMaurizio BrocchiniNature PortfolioarticleExtra Strain RateSpilling BreakerStreamline CurvatureGeometric CurvatureHydraulic JumpsMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Extra Strain Rate Spilling Breaker Streamline Curvature Geometric Curvature Hydraulic Jumps Medicine R Science Q
spellingShingle	Extra Strain Rate Spilling Breaker Streamline Curvature Geometric Curvature Hydraulic Jumps Medicine R Science Q Alessia Lucarelli Claudio Lugni Massimo Falchi Mario Felli Maurizio Brocchini Extra Strain Rates in an unsteady spilling breaking wave
description	Abstract We analyze the extra strain rates that characterize a curved, thin mixing layer induced at an unsteady spilling breaker. We focus on the flow curvature, which induces some extra rates of strain that should be accounted for in algebraic-type turbulence closures. The comparison between the analytical formulation proposed by Brocchini and co-workers for a single-phase turbulent thin layer of fluid and the data, obtained from a Particle Image Velocimetry (PIV) dedicated experimental program, reveals that the order of magnitude of the extra rates of strain induced by the streamline curvature, is comparable with that of the simple shear. This differs from what observed for the geometric curvature terms and from what occurs at hydraulic jumps, typically used to model steady breakers.
format	article
author	Alessia Lucarelli Claudio Lugni Massimo Falchi Mario Felli Maurizio Brocchini
author_facet	Alessia Lucarelli Claudio Lugni Massimo Falchi Mario Felli Maurizio Brocchini
author_sort	Alessia Lucarelli
title	Extra Strain Rates in an unsteady spilling breaking wave
title_short	Extra Strain Rates in an unsteady spilling breaking wave
title_full	Extra Strain Rates in an unsteady spilling breaking wave
title_fullStr	Extra Strain Rates in an unsteady spilling breaking wave
title_full_unstemmed	Extra Strain Rates in an unsteady spilling breaking wave
title_sort	extra strain rates in an unsteady spilling breaking wave
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/f63703b5eeb246bb98ed4b4037657e33
work_keys_str_mv	AT alessialucarelli extrastrainratesinanunsteadyspillingbreakingwave AT claudiolugni extrastrainratesinanunsteadyspillingbreakingwave AT massimofalchi extrastrainratesinanunsteadyspillingbreakingwave AT mariofelli extrastrainratesinanunsteadyspillingbreakingwave AT mauriziobrocchini extrastrainratesinanunsteadyspillingbreakingwave
_version_	1718388293342593024

Extra Strain Rates in an unsteady spilling breaking wave

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