[sushant]

Dear all,

I am trying to change the energy equation variable in 2.2.x sprayFoam from sensible enthalpy to absolute enthalpy. This is my current thermophysical setup:

thermoType
{
    type            hePsiThermo;
    mixture         reactingMixture;
    transport       sutherland;
    thermo          janaf;
    energy          sensibleEnthalpy;
    equationOfState perfectGas;
    specie          specie;
}

If I change sensibleEnthalpy to absoluteEnthalpy I get a list of possible combinations supported, which does not include the one I want. http://www.openfoam.org/version2.2.0/thermophysical.php has this to say:

If the particular combination of models is not available in the list, that combination can be compiled into a library or the application (as always).

If I look in src/thermophysicalModels/reactionThermo/psiReactionThermo/psiReactionThermos.C, it is straightforward to construct absoluteEnthalpy variants that will apply for homogeneousMixture, inhomogeneousMixture, etc., which is done by

makeReactionThermo
(
    psiThermo,
    psiReactionThermo,
    hePsiThermo,
    inhomogeneousMixture,
    sutherlandTransport,
    absoluteEnthalpy,
    janafThermo,
    perfectGas,
    specie
);

However the construction for the reaction mixtures is:

makeReactionMixtureThermo
(
    psiThermo,
    psiReactionThermo,
    hePsiThermo,
    reactingMixture,
    gasHThermoPhysics
);

How can I reformulate this to use the absolute enthalpy?

Regards,
Sushant