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Convergence of an implicit Euler Galerkin scheme for Poisson–Maxwell–Stefan systems
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Convergence of an implicit Euler Galerkin scheme for Poisson–Maxwell–Stefan systems
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Journal Article
Convergence of an implicit Euler Galerkin scheme for Poisson–Maxwell–Stefan systems
2019
Overview
A fully discrete Galerkin scheme for a thermodynamically consistent transient Maxwell–Stefan system for the mass particle densities, coupled to the Poisson equation for the electric potential, is investigated. The system models the diffusive dynamics of an isothermal ionized fluid mixture with vanishing barycentric velocity. The equations are studied in a bounded domain, and different molar masses are allowed. The Galerkin scheme preserves the total mass, the nonnegativity of the particle densities, their boundedness and satisfies the second law of thermodynamics in the sense that the discrete entropy production is nonnegative. The existence of solutions to the Galerkin scheme and the convergence of a subsequence to a solution to the continuous system is proved. Compared to previous works, the novelty consists in the treatment of the drift terms involving the electric field. Numerical experiments show the sensitive dependence of the particle densities and the equilibration rate on the molar masses.
Publisher
Springer Nature B.V
Subject
