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Dennis Gläser authored
This commit also modifies the tracer_tracer test, as this failed for box after removing the elembctypes. This is because it was using Neumann no-flow boundary conditions for the fracture domain on the left boundary while the bulk problem used Dirichlet BCs. The old elembctypes for box were discarding Dirichlet BCs on those nodes on the boundary that also couple to fractures in order for the coupling conditions to be fulfilled. However, that discards the boundary condition. With this commit, Dirichlet BCs are always fulfilled, but for the tracer test this means that as a consequence, the pressure in the fracture on the left side is equal to the bulk pressure - because it uses Dirichlet-type coupling conditions. This commit changes the test such that it uses Dirichlet BCs in the bulk domain only on the lower part of the boundary such that the fracture touches the domain boundary at a no-flow boundary.
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