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4.8.2.1 Constant Isotropic Permeability
The material type for constant isotropic permeability is “perm-const-iso”. The following material parameters must be defined:
| <perm> | hydraulic permeability | [L /F t] |
This isotropic material model uses the biphasic theory for describing the time-dependent material behavior of materials that consist of both a solid and fluid phase [44].
When the permeability is isotropic, For this material model, is constant. Generally, this assumption is only reasonable when strains are small.
Example:
<permeability name="Permeability" type="perm-const-iso"> <perm>0.001</perm> </permeability>