[anuargimenez]

Hello Foamers,

I am trying to add a temperature dependent viscosity model to use it in a compressible solver (rhoSimpleFoam). For that, I need to modify the CrossPowerLaw model in src/TurbulenceModels/turbulenceModels/laminar/generalizedNewtonian/generalizedNewtonianViscosityModels/CrossPowerLaw and add a Temperature and Density dependent expression.

I tried to acces theese variables with:

const volScalarField& T = U_.mesh().lookupObject<volScalarField>("T");
const volScalarField& rho = U_.mesh().lookupObject<volScalarField>("rho");

But when I compile i get this error:

CrossWLF.C: In member function ‘virtual Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > Foam::laminarModels::generalizedNewtonianViscosityModels::CrossWLF::nu(const volScalarField&, const volScalarField&) const’:
CrossWLF.C:119:28: error: ‘U_’ was not declared in this scope; did you mean ‘m_’?
  119 |  const volScalarField& T = U_.mesh().lookupObject<volScalarField>("T");
      |                            ^~
      |                            m_
CrossWLF.C:119:65: error: expected primary-expression before ‘>’ token
  119 |  const volScalarField& T = U_.mesh().lookupObject<volScalarField>("T");
      |                                                                 ^

Any advice would be very helpfull.
Thank you very much in advance for your help!!