[sabrahams]

I'm using compressibleInterFoam in OpenFOAM 9. It is possible to allow phase change using the Kunz, Merkle or Schnerr-Sauer models.


I expected there to be a source term in the temperature equation to account for the latent heat taken/released during vaporisation/condensation. I can't see any such source term or any correction to the temperature due to phase change.

    fvScalarMatrix TEqn
    (
        fvm::ddt(rho, T) + fvm::div(rhoPhi, T) - fvm::Sp(contErr, T)
      - fvm::laplacian(turbulence.alphaEff(), T)
      + (
            fvc::div(fvc::absolute(phi, U), p)()() // - contErr/rho*p
          + (fvc::ddt(rho, K) + fvc::div(rhoPhi, K))()()
          - (U()&(fvModels.source(rho, U)&U)()) - contErr*K
        )
       *(
           alpha1()/mixture.thermo1().Cv()()
         + alpha2()/mixture.thermo2().Cv()()
        )
     ==
        fvModels.source(rho, T)
    );

    TEqn.relax();

    fvConstraints.constrain(TEqn);

    TEqn.solve();

    fvConstraints.constrain(T);

    mixture.correctThermo();
     mixture.correct();

I believe fvModels.source allows for a user-defined source term in an fvModels file and does not relate to latent heat or phase change.


Is a latent heat source term or temperature correction defined elsewhere? Or is the latent heat energy not accounted for in this solver?

[saloni]

Hello, I have had this same confusion. Did you find out?