The filmPyrolysisTemperatureCoupled is boundary condition designed to be used in conjunction with surface film and pyrolysis modelling. It provides a temperature boundary condition for patches on the primary region based on whether the patch is seen to be ‘wet’, retrieved from the film alpha field.


The condition requires entries in both the boundary and field files.

Boundary file

    type            patch;

Field file

    // Mandatory entries
    type            filmPyrolysisTemperatureCoupled;

    // Optional entries
    filmRegion      <word>;
    pyrolysisRegion  <word>;
    phi             <word>;
    rho             <word>;

    // Inherited entries


Property Description Type Required Default
type Type name: filmPyrolysisTemperatureCoupled word yes -
pyrolysisRegion Name of pyrolysis region word no pyrolysisProperties
filmRegion Name of film region word no surfaceFilmProperties
phi Name of flux region word no phi
rho Name of density region word no rho

The inherited entries are elaborated in:

  • fixedValueFvPatchField.H

Further information


  • N/A

Source code:



  • Introduced in version 2.0.0