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A Cell-Centered Lagrangian Scheme for Two-Dimensional Compressible Flow Problems

Abstract : We present a new Lagrangian cell-centered scheme for two-dimensional compressible flows. The primary variables in this new scheme are cell-centered, i.e., density, momentum and total energy are defined by their mean values in the cells. The vertex velocities and the numerical fluxes through the cell interfaces are not computed independently contrary to standard approaches but are evaluated in a consistent manner due to an original solver located at the nodes. The main new features of the algorithm is the introduction of four pressures on each edge, two for each node on each side of the edge. This extra degree of freedom, allows us to construct a nodal solver which fulfills two properties. First, the conservation of momentum and total energy is ensured. Second, a semi-discrete entropy inequality is provided. In the case of a one-dimensional flow, the solver reduces to the classical Godunov acoustic solver: it can be considered as its two-dimensional generalization. Many numerical tests are presented. They are representative test cases for compressible flows and demonstrate the robustness and the accuracy of this new solver.
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Contributor : Pierre-Henri Maire Connect in order to contact the contributor
Submitted on : Tuesday, November 14, 2006 - 9:32:15 AM
Last modification on : Tuesday, March 29, 2022 - 3:01:49 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 7:29:31 PM




Rémi Abgrall, Jérôme Breil, P.H. Maire, Jean Ovadia. A Cell-Centered Lagrangian Scheme for Two-Dimensional Compressible Flow Problems. SIAM Journal on Scientific Computing, Society for Industrial and Applied Mathematics, 2007, A Cell-Centered Lagrangian Scheme for Two-Dimensional Compressible Flow Problems, 29 (4), pp.1781-1824. ⟨10.1137/050633019⟩. ⟨inria-00113542⟩



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