7.6.2.17.7. Mass_Fraction_Porous_Density

Syntax

Bulk Mass Density [{of} SpeciesName] = Mass_Fraction_Porous_Density ()

Scope

Aria Material

Summary

Provides the mass term for the mass balance equation where the bulk mass density is computed from mass fraction, porosity, density and optionally the saturation.

Description

For species $i$ and phase $p$ , this model provides the bulk mass density and its temporal derivative resulting in the mass term

$\dfrac{\partial Y_{i,p} \phi S_p \rho_p}{\partial t},$

where $Y_{i, p}$ is the species mass fraction in the given phase, $\phi$ is the porosity, $S_p$ is an optional phase saturation, and $\rho_p$ is the phase density. If the optional phase saturation $S_p$ is provided, the pore volume is assumed to be occupied by multiple phases (e.g., liquid / gas) in accordance to their saturations, otherwise it is occupied fully by a single phase. This model is not applicable to the solid phase, which defines bulk density as per total volume, not per phase volume.

Parameter	Value	Default
{of}	{of \| species \| subindex}	–
SpeciesName	string	–