# 7.15.1.14. Porous_Species

Syntax

  Eq Porous_Species for Associated DoF [{of} SpeciesName | {in} MaterialPhaseName | {ls} {a | b | c}] {on} MeshPart using Interp with {Term_0} … {Term_N}

Scope

  Aria Region

Summary

  The species transport equation porous media. See general porous flow information in Porous Flow Equations.

Description

  Admissible value for Dof are `PRESSURE`, `SPECIES`, and `SPECIES_FRACTION`.

  Admissible values of Interp are .

  Admissible values of Term_n are `MASS`, `LUMPED_MASS`, `ADV`, `UPWIND_ADV`, `DIFF`, `SRC`, and `XFER`.

  With the exception of `XFER` these terms are described in Porous Flow Equations.

  The Meshpart must be an active element block.

  Additionally, one can choose whether to integrate the advection term by parts by setting the flag `INTEGRATE ADVECTION BY PARTS = false` in the `POROUS_FLOW_OPTIONS` block of `SOLUTION_OPTIONS`. The default is true.

Parameter | Value | Default
--- | --- | ---
{of} | {of | species | subindex} | –
SpeciesName | string | –
{in} | {in | material_phase} | –
MaterialPhaseName | string | –
{ls} | {levelset_phase | ls} | –
Associated DoF | string | –
{on} | {@ | at | for | in | on | over} | –
MeshPart | string | –
Interp | string | –
{Term_n} | See Description | –