Converted document
$\newcommand{\lyxlock}{}$
Subsubsection 4.8.2.2: Exponential Isotropic Permeability Up Subsection 4.8.2: Permeability Materials Subsubsection 4.8.2.4: Referentially Isotropic Permeability

#### 4.8.2.3 Holmes-Mow

The material type for Holmes-Mow permeability is “perm-Holmes-Mow”. The following material parameters need to be defined:
 isotropic hydraulic permeability in the reference state [L/Ft] exponential strain-dependence coefficient () [ ] power-law exponent () [ ]
This isotropic material is similar to the constant isotropic permeability material described above, except that it uses a strain-dependent permeability tensor [32]: where, and is the Jacobian of the deformation, i.e. where is the deformation gradient.
Example:
This example defines a permeability material of the Holmes-Mow type.
<permeability type="perm-Holmes-Mow">
<perm>0.001</perm>
<M>1.5</M>
<alpha>2</alpha>
</permeability>


Subsubsection 4.8.2.2: Exponential Isotropic Permeability Up Subsection 4.8.2: Permeability Materials Subsubsection 4.8.2.4: Referentially Isotropic Permeability