Dispersive and dispersive-like bores in channels with sloping banks
CHASSAGNE, Rémi
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
RICCHIUTO, Mario
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
See more >
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
CHASSAGNE, Rémi
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
RICCHIUTO, Mario
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
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Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
Language
en
Rapport
This item was published in
2018
Abstract
Dans cet article, une analyse dille la dynamique des ressauts undulaires dans des canaux de section variable est prnt Desrmes Low Froude Number (LFN) et High Froude Number (HFN), sont simulvec un mod Serre-Green-Naghdi et ...Read more >
Dans cet article, une analyse dille la dynamique des ressauts undulaires dans des canaux de section variable est prnt Desrmes Low Froude Number (LFN) et High Froude Number (HFN), sont simulvec un mod Serre-Green-Naghdi et les rltats sont comparux expences de Treske. Nous montrons que, contrairement aux ondes Favre et aux ondes HFN, contrlar desmnismes dispersifs non hydrostatiques, les ondes LFN correspondent phm hydrostatique. Les propris de dispersion des ressauts LFN sont li raction des vagues sur les berges, de la m mani que les edge waves. Un mod thique hydrostatique permettant de dire ces ondes \dispersive-like" est dv comparx observations, confirmant ainsi notre hypoth.Read less <
English Abstract
In this paper, a detailed analysis of undular bore dynamics in channels of variable cross-section is presented. Two undular bore regimes, Low Froude Number (LFN) and High Froude Number (HFN), are simulated with a ...Read more >
In this paper, a detailed analysis of undular bore dynamics in channels of variable cross-section is presented. Two undular bore regimes, Low Froude Number (LFN) and High Froude Number (HFN), are simulated with a Serre-Green-Naghdi model, and the results are compared with the experiments by Treske. We show that contrary to Favre waves and HFN bores, whichare controlled by dispersive non-hydrostatic mechanisms, LFN bores correspond to a hydrostatic phenomenon. The dispersive-like properties of the LFN bores is related to wave refraction on the banks in a way similar to that of edge waves in the nearshore. A fully hydrostatic theoretical model allowing to describe these dispersive-like bores is derived and compared to the observations, confirming our claim.Read less <
Keywords
Nombre de Froude
Analyse asymptotique
Modèles Serre-Green-Naghdi
Choc dispersifs
Ondes longues
Effets dispersifs
English Keywords
Froude number
Dispersive effects
Dispersive shocks
Serre-Green-Naghdi equations
Asymptotic analysis
Tidal bores
Long waves
Channels
ANR Project
Tsunamis en Atlantique et MaNche : Définition des Effets par Modélisation - ANR-11-RSNR-0023
Origin
Hal imported