Porous Matrix
This node defines the porosity and permeability of the solid matrix of the Porous Medium parent node.
model input
This section contains fields and values that are inputs for expressions defining material properties. If such user-defined property groups are added, the model inputs appear here.
Matrix properties
Select the material to use as porous matrix. Select Domain material (the default) from the Porous material list to use the material defined for the porous domain. Select another material to use that material’s properties.
The default Porosity εp (a dimensionless number between 0 and 1) uses the value From material, defined by the Porous material selected. For User defined the default is 0.5.
The default Permeability κ (SI unit: m2) uses the value From material, as defined by the Porous material selected. For User defined the default is the Isotropic scalar value of 1e-9  m2. To define a tensor value, select Diagonal, Symmetric, or Full, and enter values or expressions in the matrix.