move tortuosity to medium
This MR moves makes tortuosity a medium property.
- This allows the use of same liquid/gas properties while tortuosity could change between different media.
- It enables the use of values
\neq 1
in TH2M as it is a coefficient for vapour and solute diffusion.
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Feature description was added to the changelog -
Tests covering your feature were added? -
Any new feature or behavior change was documented?
Edited by Dmitry Yu. Naumov