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Article Dans Une Revue International Journal for Numerical Methods in Fluids Année : 2022

An explicit finite volume scheme on staggered grids for the Euler equations: Unstructured meshes, stability analysis, and energy conservation

Résumé

We set up a numerical strategy for the simulation of the Euler equations, in the framework of finite volume staggered discretizations where numerical densities, energies and velocities are stored on different locations. The main difficulty relies on the treatment of the total energy, which mixes quantities stored on different grids. The proposed method is strongly inspired, on the one hand, from the kinetic framework for the definition of the numerical fluxes, and, on the other hand, from the Discrete Duality Finite Volume (ddfv) framework, which has been designed for the simulation of elliptic equations on complex meshes. The time discretization is explicit and we exhibit stability conditions that guaranty the positivity of the discrete densities and internal energies. Moreover, while the scheme works on the internal energy equation, we can define a discrete total energy which satisfies a local conservation equation. We provide a set of numerical simulations to illustrate the behaviour of the scheme.
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Dates et versions

hal-03428367 , version 1 (15-11-2021)

Identifiants

Citer

Thierry Goudon, Julie Llobell, Sebastian Minjeaud. An explicit finite volume scheme on staggered grids for the Euler equations: Unstructured meshes, stability analysis, and energy conservation. International Journal for Numerical Methods in Fluids, 2022, 94 (1), pp.76--119. ⟨10.1002/fld.5048⟩. ⟨hal-03428367⟩
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