# 7.6.15.13.7. From_Density_Ratio

Syntax

  Porosity [{of} SpeciesName] = From_Density_Ratio Solid_Density = solid_density

Scope

  Aria Material

Summary

  Porosity computed as one minus the density ratio between solved for solid-phase density and solid density of non-porous material.

Parameter | Value | Default
--- | --- | ---
{of} | {of | species | subindex} | –
SpeciesName | string | –
solid_density | real | –