A multilayer Saint-Venant system with mass exchanges for Shallow Water flows. Derivation and numerical validation - Archive ouverte HAL Access content directly
Journal Articles ESAIM: Mathematical Modelling and Numerical Analysis Year : 2009

A multilayer Saint-Venant system with mass exchanges for Shallow Water flows. Derivation and numerical validation

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Abstract

The standard multilayer Saint-Venant system consists in introducing fluid layers that are advected by the interfacial velocities. As a consequence there is no mass exchanges between these layers and each layer is described by its height and its average velocity. Here we introduce another multilayer system with mass exchanges between the neighborhing layers where the unknowns are a total height of water and an average velocity per layer. We derive it from Navier-Stokes system with an hydrostatic pressure and prove energy and hyperbolicity properties of the model. We also give a kinetic interpretation leading to effective numerical schemes with positivity and energy properties. Numerical tests show the versatility of the approach and its ability to compute recirculation cases with wind forcing.
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Dates and versions

hal-00355730 , version 1 (23-01-2009)

Identifiers

Cite

Emmanuel Audusse, Marie-Odile Bristeau, Benoît Perthame, Jacques Sainte-Marie. A multilayer Saint-Venant system with mass exchanges for Shallow Water flows. Derivation and numerical validation. ESAIM: Mathematical Modelling and Numerical Analysis, 2009, 45, pp.169-200. ⟨10.1051/m2an/2010036⟩. ⟨hal-00355730⟩
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