[fnovo]

Dear Foamers,


I am facing an issue with the source classes at the moment. It's probably just one little mistake I made or something I don't understand.

Right now I am trying to write a class for battery heating. This is supposed to be used by the fvOptions dictionary. So far it works, but I am uncertain about the units,
The following code is the one I am talking about.

scalarField& heSource = eqn.source();
Info<<"eqn dimension "<<eqn.dimensions()<<nl;
Info<<"heatFlow dimension "<<heatFlow.dimensions()<<nl;
heSource-=heatSource;

So far, the heat source term has the unit W. According to the log file, eqn has the unit W as well. So this code works. Yesterday I tried to change it as followed:

scalarField& heSource = eqn.source();
Info<<"eqn dimension "<<eqn.dimensions()<<nl;
Info<<"heatFlow dimension "<<heatFlow.dimensions()<<nl;
eqn-=heatSource;

Using the changed class as a source term gives me the error message

--> FOAM FATAL ERROR: 

    [h[1 -1 -3 0 0 0 0] ] -= [heatFlow[1 2 -3 0 0 0 0] ]

    From function void Foam::checkMethod(const Foam::fvMatrix<Type>&, const Foam::DimensionedField<Type, Foam::volMesh>&, const char*) [with Type = double]
    in file /home/student-ift/OpenFOAM/OpenFOAM-5.x/src/finiteVolume/lnInclude/fvMatrix.C at line 1304.

What is the issue with the new code? Is OpenFoam somehow asuming to get the source term in W when using ern.source()? Or am I even allowed to calculate the source term in W?

I couldn't find any answers to my question so far. I hope someone can help me out



Kind regards,
Frederik

[fnovo]

Is there no one with an idea regarding this? I tried to find the definition of source() in the fvMatrix code. But it seems like, this function is just returning the variable source_.


Code from fvMatrix.H:

         //- Source term 
         Field<Type> source_;

             Field<Type>& source()
 
             {
 
                 return source_;
 
             }
 
  
 
             const Field<Type>& source() const
 
             {
 
                 return source_;
 
             }

Unfortunately, I cannot find the definition of source_ or any hints regarding the dimension...
I hope that someone came across this problem ealier