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18.104.22.168 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 .
When the permeability is isotropic, For this material model, is constant. Generally, this assumption is only reasonable when strains are small.
<permeability name="Permeability" type="perm-const-iso"> <perm>0.001</perm> </permeability>