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OGS
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Permeability model as proposed by Olivella&Alonso.
This property must be a medium property, it computes the permeability in dependence of the strain
The model was proposed in [2] and it was further investigated in [31] .
The model takes the form of
\mathbf{k} = k_\text{m} \mathbf{I} + \frac{b}{a} \left( \frac{b^2}{12} - k_\text{m} \right) \left( \mathbf{I} - \mathbf{M} \right)
with
\mathbf{M} = \vec{n} \otimes \vec{n}
and
b = b_0 + \Delta b \\ \Delta b = a \langle \varepsilon_\text{n}- \varepsilon_0 \rangle
where
| k_\text{m} | permeability of undisturbed material |
| b | fracture aperture |
| b_0 | initial aperture |
| a | mean fracture distance |
| \vec{n} | fracture normal vector |
| \varepsilon_n | strain in fracture normal direction |
| \varepsilon_0 | threshold strain |
No additional info.
1.12.0