7.6.2.17.11. Porous_Density

Syntax

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

Scope

Aria Material

Summary

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

Description

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

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

where $\phi$ is the porosity, $S_p$ is the optional phase saturation, and $\rho_{i, p}$ is the species density in the given phase. If no species is set, this is applied to the general property.

This model is not applicable to the solid phase, which defines bulk density as mass per total volume, not per phase volume. 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.

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