Abstract
This work considers the barotropic Euler equations and proposes a high-order conservative scheme based on a Lagrange-Projection decomposition. The high-order in space and time are achieved using Discontinuous Galerkin (DG) and Runge-Kutta (RK) strategies. The use of a Lagrange-Projection decomposition enables the use of time steps that are not constrained by the sound speed thanks to an implicit treatment of the acoustic waves (Lagrange step), while the transport waves (Projection step) are treated explicitly. We compare our DG discretization with the recent one (Renac in Numer Math 1-27, 2016, [7]) and state that it satisfies important non linear stability properties. The behaviour of our scheme is illustrated by several test cases.
References
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Acknowledgements
The authors are very grateful to P. Kestener, S. Kokh and F. Renac for stimulating discussions, and the “Maison de la Simulation” for providing excellent working conditions to the second author.
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Chalons, C., Stauffert, M. (2017). A High-Order Discontinuous Galerkin Lagrange Projection Scheme for the Barotropic Euler Equations. In: Cancès, C., Omnes, P. (eds) Finite Volumes for Complex Applications VIII - Hyperbolic, Elliptic and Parabolic Problems. FVCA 2017. Springer Proceedings in Mathematics & Statistics, vol 200. Springer, Cham. https://doi.org/10.1007/978-3-319-57394-6_7
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DOI: https://doi.org/10.1007/978-3-319-57394-6_7
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