DiagCG for a PDE system with continuous Galerkin without a matrix.
DiagCG advances a system of partial differential equations (PDEs) using continuous Galerkin (CG) finite element (FE) spatial discretization (using linear shapefunctions on tetrahedron elements) combined with a time stepping scheme that is equivalent to the Lax-Wendroff (LW) scheme within the unstructured-mesh FE context and treats discontinuities with flux-corrected transport (FCT). Only the diagonal entries of the left-hand side matrix are non-zero thus it does not need a matrix-based linear solver.
- namespace inciter
- Inciter declarations and definitions.