Maire, Pierre-Henri; Abgrall, Rémi; Breil, Jérôme; Ovadia, Jean A cell-centered Lagrangian scheme for two-dimensional compressible flow problems. (English) Zbl 1251.76028 SIAM J. Sci. Comput. 29, No. 4, 1781-1824 (2007). Summary: 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 feature 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 semidiscrete 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. Cited in 10 ReviewsCited in 180 Documents MSC: 76M12 Finite volume methods applied to problems in fluid mechanics 65M06 Finite difference methods for initial value and initial-boundary value problems involving PDEs 76L05 Shock waves and blast waves in fluid mechanics 76N20 Boundary-layer theory for compressible fluids and gas dynamics Keywords:Godunov-type schemes; hyperbolic conservation laws; Lagrangian gas dynamics PDFBibTeX XMLCite \textit{P.-H. Maire} et al., SIAM J. Sci. Comput. 29, No. 4, 1781--1824 (2007; Zbl 1251.76028) Full Text: DOI Link