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- W3216775402 abstract "A quasi-second order scheme is developed to obtain approximate solutions of the shallow water equationswith bathymetry. The scheme is based on a staggered finite volume scheme for the space discretization:the scalar unknowns are located in the discretisation cells while the vector unknowns are located on theedges (in 2D) or faces (in 3D) of the mesh. A MUSCL-like interpolation for the discrete convectionoperators in the water height and momentum equations is performed in order to improve the precisionof the scheme. The time discretization is performed either by a first order segregated forward Eulerscheme in time or by the second order Heun scheme. Both schemes are shown to preserve the waterheight positivity under a CFL condition and an important state equilibrium known as the lake at rest.Using some recent Lax-Wendroff type results for staggered grids, these schemes are shown to be Lax-consistent with the weak formulation of the continuous equations; besides, the forward Euler schemeis shown to be consistent with a weak entropy inequality. Numerical results confirm the efficiency andaccuracy of the schemes." @default.
- W3216775402 created "2021-12-06" @default.
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- W3216775402 date "2021-11-18" @default.
- W3216775402 modified "2023-09-27" @default.
- W3216775402 title "A Consistent Quasi-Second Order Staggered Scheme for the Two-Dimensional Shallow Water Equations" @default.
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- W3216775402 doi "https://doi.org/10.48550/arxiv.2111.09726" @default.
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