Martin Schneider authored Jul 01, 2020 and Timo Koch committed Sep 30, 2020

Currently all neighbors of neihbors are added,
which is not really efficient.

The types for stencils are now passed to the nodal index set via
a traits class. This allows using Dune::ReservedVector whenever the
maximum sizes are known at compile time.

Mpfa contributed by DennisGlaeser

Dennis Gläser authored Jan 16, 2018 and Timo Koch committed Jan 18, 2018

This reduces the massive memory overhead for mpfa schemes.

This requires additional info to be supplied by the FluxStencils. For example,
this commit further introduces the property MaxNumBranchesPerScvf with
which the size for these reserved vectors is parameterized for network/surface
grids.

Kilian Weishaupt authored Jan 09, 2018 and Dennis Gläser committed Jan 11, 2018

* cast enum to int before comparing

the dual grid index set now does not contain the data on the global scv indices
that are connected to the faces. The local data is only available in the iv index set.
This should be better for methods other than the mpfa-o method, as in those the local mappings
of the dual grid index set is maybe useless (e.g. for the mpfa-l scheme).

TODO: implement ficks and fouriers law, as well as the interaction volume data handles
accordingly for problems involving diffusion/heat conduction

Fix the flux stencil for every method independent of the stencils used
in the different flux laws. The matrix entries have to be reserved for all
possible occuring stencils if the method has parameter or solution dependent
stencils, otherwise the matrix needs to be rebuild every time. This implements
this unified flux stencil for box, cc, ccmpfa.
Remove a lot of duplicate code.
Separate the physical laws from the dicretization stencil.