Superposition of local zoom model and simultaneous calibration for 1D-2D shallow water flows - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Mathematics and Computers in Simulation Année : 2009

Superposition of local zoom model and simultaneous calibration for 1D-2D shallow water flows

Résumé

We address the problem of coupling 2D shallow water equations with 1D shallow water equations (St-Venant equations), as applied to river-floodplain flows. Mathematical coupling conditions are derived classicaly from the 3D Navier-Stokes equations by integrating over the vertical wet section, when overflowing occurs. It leads to extra source terms in the 1D equations. Next we assume to be in a variational data assimilation context, then the optimal control process allows to couple both models and assimilate data simultaneously (Joint Assimilation Coupling algorithms). Two different versions of JAC algorithms are presented and compared. In a numerical test case, we superimpose the local 2D model on the 1D global model. The results show the efficiency of the present simultaneous superposition-assimilation approach.
Fichier principal
Vignette du fichier
MarinMonnier09.pdf (502.28 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00908223 , version 1 (22-11-2013)

Identifiants

Citer

Joel Marin, Jerome Monnier. Superposition of local zoom model and simultaneous calibration for 1D-2D shallow water flows. Mathematics and Computers in Simulation, 2009, 80 (3), pp.547-560. ⟨10.1016/j.matcom.2009.09.001⟩. ⟨hal-00908223⟩
508 Consultations
490 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More