On the physical relevance of the dam break problem in the context of nonlinear shallow water equations
Résumé
The classical dam break problem has become the de facto standard in validating the Nonlinear Shallow Water Equations (NSWE) solvers. Moreover, the NSWE are widely used for flooding simulations. While applied mathematics community is essentially focused on developing new numerical schemes, we tried to examine the validity of the mathematical model under consideration. The main purpose of this study is to check the pertinence of the NSWE for flooding processes. From the mathematical point of view, the answer is not obvious since all derivation procedures assumes the total water depth positivity. We performed a comparison between the two-fluid Navier-Stokes simulations and the NSWE solved analytically and numerically. Several conclusions are drawn out and perspectives for future research are outlined.
Domaines
Mécanique des fluides [physics.class-ph] Analyse numérique [math.NA] Physique Numérique [physics.comp-ph] Dynamique des Fluides [physics.flu-dyn] Physique Atmosphérique et Océanique [physics.ao-ph] Océan, Atmosphère Hydrologie Océanographie Milieux fluides et réactifs Géophysique [physics.geo-ph]| Origine | Fichiers produits par l'(les) auteur(s) |
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