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• W2783170686 abstract "We consider the numerical approximation of compressible flow in a pipe network. Appropriate coupling conditions are formulated that allow us to derive a variational characterization of solutions and to prove global balance laws for the conservation of mass and energy on the whole network. This variational principle, which is the basis of our further investigations, is amenable to a conforming Galerkin approximation by mixed finite elements. The resulting semidiscrete problems are locally well-posed and automatically inherit the global conservation laws for mass and energy from the continuous level. We also consider the subsequent discretization in time by a problem adapted implicit time stepping scheme which leads to conservation of mass and a slight dissipation of energy of the full discretization. The well-posedness of the fully discrete scheme is analyzed, and a fixed-point iteration is proposed for the solution of the nonlinear systems arising in every single time step. Some computational results are presented for illustration of our theoretical findings and for demonstration of the robustness and accuracy of the new method." @default.
• W2783170686 created "2018-01-26" @default.
• W2783170686 creator A5069912765 @default.
• W2783170686 date "2018-01-01" @default.
• W2783170686 modified "2023-10-15" @default.
• W2783170686 title "A Robust Conservative Mixed Finite Element Method for Isentropic Compressible Flow on Pipe Networks" @default.
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• W2783170686 doi "https://doi.org/10.1137/16m1094373" @default.
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