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Porous Medium
The Porous Medium node adds the Brinkman equations (excluding any mass sources) to the interface. It has two default subfeatures — the Fluid subfeature where the fluid density ρ(SI unit: kg/m3) and dynamic viscosity μ (SI unit: Pa·s) are defined and the Porous Matrix subfeature where the permeability κ (SI unit: m2) and porosity εp (dimensionless) are specified.
Flow Model
Define if the flow follows a linear or nonlinear pressure-velocity relationship.
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Darcian flow (default) defines a linear relationship.
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Non-Darcian flow defines a nonlinear relationship due to turbulence or inertial effects.