7.6.4.2.34. Porous_Phase_Average

Syntax

Density [{of} SpeciesName] = Porous_Phase_Average ([Liquid_Phase_Name = Liquid_Phase_Name] | [Gas_Phase_Name = Gas_Phase_Name])

Scope

Aria Material

Summary

Density for a multiphase material of two or three phases

Description

For a two-phase (solid and liquid) porous media problem:

$\rho = (1-\phi)\rho_s + \phi \rho_l$

For a three-phase (solid, liquid, gas) porous media problem:

$\rho = (1-\phi)\rho_s + \phi S_l \rho_l + \phi (1-S_l) \rho_g$

where $\phi$ is the porosity, $\rho_i$ the density in phase i, and $S_l$ the liquid saturation.