Porous media

Homogeneous porous media are modeled by the addition of a momentum source term, \(\boldsymbol{S}_{pm}\), to the fluid momentum equation.

\[\boldsymbol{S}_{pm} =-\frac{\mu_f}{C_1} \boldsymbol{u}_f - C_2\frac{1}{2}\rho_f\lvert \boldsymbol{u}_f \rvert \boldsymbol{u}_f\]

\(\mu_f\), \(\rho_f\), and \(\boldsymbol{u}_f\) are the fluid viscosity, density, and velocity and \(C_1\) and \(C_2\) are user defined constants.

The following inputs are defined using the pm prefix.

	Description	Type	Default
regions	Regions used to define porous media.	String	None
[region].volfrac	Solids volume fraction of the porous media region.	Real	None
[region].c1	Porous media permeabilty constant for the source term in fluid momentum equation.	Real	None
[region].c2	Porous media inertial resistance factor for the source term in fluid momentum equation.	Real	None
[region].allow_particles	Allow particles to flow through the porous media region.	Int	0