# 7.6.20.14.5. From_Mass_Fraction

Syntax

  Volume Fraction [{of} SpeciesName] = From_Mass_Fraction

Scope

  Aria Material

Summary

  Compute the volume fraction from the ratio of species porous density () to species solid density. The overall density material phase to use can be specified with the optional ‘Density_Phase_Name’ argument, which can be necessary for porous systems depending on how the mass fractions are defined.

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