van Genuchten Mualem model for the relative permeability of non-wetting phase
As titled, the PR presents the van Genuchten Mualem model for the relative permeability of wetting phase. (reopened PR #2902)
Besides, this PR allows use relative_permeability
as phase property (see issue #2904 (closed)).
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Feature description was added to the changelog? not yet -
Tests covering your feature were added? Yes, there is an unit test. -
Any new feature or behavior change was documented? Yes, it was.