Carpet/CarpetLib: Add Lagrange_third_order_prolong prolongation option.
Issue #2189
open
When the default prolongation type is chosen in a dynamical spacetime evolution, hydrodynamic and GRMHD fields can suffer from spurious oscillations generated at AMR refinement boundaries due to the high-order Lagrange polynomial prolongation.
As there is no way to directly specify the prolongation order in the interface.ccl, I have created a Carpet pull request that adds the desired order (3rd) Lagrange polynomial prolongation:
https://bitbucket.org/eschnett/carpet/pull-requests/21/
I would like this to be the default prolongation option for IllinoisGRMHD and GiRaFFE, so it would be immediately useful.
Keyword: None