The Porosity εp (a dimensionless number between 0 and 1) uses by default the value
From material. For
User defined the default value is 1.
Select a Permeability model to specify the capacity of the porous material to transmit flow. Depending on the
Flow model selection in the parent
Porous Medium feature node you can choose between the following options:
The default Permeability κ (SI unit: m
2) uses the value
From material, as defined by the
Porous material list. For
User defined select
Isotropic to define a scalar value or
Diagonal or
Symmetric to define a tensor value.
For Kozeny-Carman, enter the mean
Particle diameter dp (SI unit: m), the default value is 0.5 mm.
In case a Non-Darcian flow model is chosen in the parent node,
Forchheimer is the default selection for the
Permeability model. For
Forchheimer, the default
Permeability κ (SI unit: m
2) uses the value
From material. Furthermore, the dimensionless
Forchheimer parameter cF can be defined. The default value is 0.55.
If Ergun is selected, enter the mean
Particle diameter dp (default value: 0.5 mm). The permeability
κ is then calculated using
Equation 2-4 in the
Porous Media Flow Module User’s Guide.