Extra Strain Rates in an unsteady spilling breaking wave
| Autor: | Massimo Falchi, Mario Felli, Alessia Lucarelli, Maurizio Brocchini, Claudio Lugni |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
extra strain Science Flow (psychology) Curvature 01 natural sciences Geometric Curvature 010305 fluids & plasmas Physics::Fluid Dynamics 0103 physical sciences Hydraulic jump 0105 earth and related environmental sciences Physics Multidisciplinary Turbulence turbulence Breaking wave Mechanics Hydraulic Jumps PIV Simple shear Spilling Breaker Particle image velocimetry Extra Strain Rate Streamline Curvature Medicine Order of magnitude |
| Zdroj: | Scientific Reports, Vol 8, Iss 1, Pp 1-8 (2018) Scientific Reports Scientific reports (Nature Publishing Group) 8 (2018). doi:10.1038/s41598-018-32307-3 info:cnr-pdr/source/autori:Lucarelli, Alessia (1); Lugni, Claudio(1,2); Falchi, Massimo(1); Felli, Mario(1); Brocchini, Maurizio(3)/titolo:Extra Strain Rates in an unsteady spilling breaking wave/doi:10.1038%2Fs41598-018-32307-3/rivista:Scientific reports (Nature Publishing Group)/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:8 |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-018-32307-3 |
| Popis: | 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. © The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License. |
| Databáze: | OpenAIRE |
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