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Stabilized Galerkin for Transient Advection of Differential Forms

by H. Heumann and R. Hiptmair and C. Pagliantini

(Report number 2015-06)

Abstract
We deal with the discretization of generalized transient advection problems for differential forms on bounded spatial domains. We pursue an Eulerian method of lines approach with explicit time-stepping. Concerning spatial discretization we extend the jump stabilized Galerkin discretization proposed in [H. HEUMANN and R. HIPTMAIR, Stabilized Galerkin methods for magnetic advection, Math. Modelling Numer. Analysis, 47 (2013), pp. 1713--1732] to forms of any degree and, in particular, advection velocities that may have discontinuities resolved by the mesh. A rigorous a priori convergence theory is established for Lipschitz continuous velocities, conforming meshes and standard finite element spaces of discrete differential forms. However, numerical experiments furnish evidence of the good performance of the new method also in the presence of jumps of the advection velocity.

Keywords: Transient advection-diffusion problems, Discontinuous velocity, Stabilized Galerkin methods, Discrete differential forms, Explicit Runge-Kutta time-stepping

@Techreport{HHP15_596,
  author = {H. Heumann and R. Hiptmair and C. Pagliantini},
  title = {Stabilized Galerkin for Transient Advection of Differential Forms},
  institution = {Seminar for Applied Mathematics, ETH Z{\"u}rich},
  number = {2015-06},
  address = {Switzerland},
  url = {https://www.sam.math.ethz.ch/sam_reports/reports_final/reports2015/2015-06.pdf },
  year = {2015}
}

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