[rol97]

Hi everyone,
I am dealing with codedMixed BC and I need to check the value of the variables that are used within the calculation. I wanted to save the values to post-process them and check if the bc are calculated in the correct way. I do not care how they are saved, as long as I am able to access them.
However I am not managing to store such information, I have tried with ofstream inside the bc code, to save the variables as a CSV, but it does not work.

Any advice?

[crubio.abujas]

I think that the problem may be that you're executing the code when correcting the boundary condition insted of when you're writting. It would be interesting to see the code though.

If you want to have better control to when is the information written you may try a codedFunctionObject instead.

coded
{
    libs            ("libutilityFunctionObjects.so");
    type            coded;
    name            codedFunction;

    codeWrite
    #{
        word timeName(mesh().time().timeName());
        fileName outputFile (timeName/"mimimi");
        OFstream os(outputFile);

        const scalarField& V = mesh().V();
        const volVectorField& C = mesh().C();

        label patchID = mesh().boundaryMesh().findPatchID("outlet");
        const volVectorField& U = mesh().lookupObject<volVectorField>("U");
        const vectorField& patch = C.boundaryField()[patchID];
        const vectorField& Upatch = U.boundaryField()[patchID];
        
        os  << "# This is the header of the CSV" << nl
            << "# X , Y, Z, UX, UY, UZ" << nl;
        forAll(patch, facei)
        {
            os << patch[facei].x() << "," 
               << patch[facei].y() << "," 
               << patch[facei].z() << "," 
               << Upatch[facei][0] << ","
               << Upatch[facei][1] << ","
               << Upatch[facei][2] << nl ;
        }
        os << endl;
    #};
}

I've tried this function on OF7 and worked fine. There you can identify the field/patch of interest and write the information.

An alternative may be to write a custom boundary condition and modify the write() method in there.

Give it a try and let's hope it works for you as well.

[trailer]

Originally Posted by rol97

Hi everyone,
I am dealing with codedMixed BC and I need to check the value of the variables that are used within the calculation. I wanted to save the values to post-process them and check if the bc are calculated in the correct way. I do not care how they are saved, as long as I am able to access them.
However I am not managing to store such information, I have tried with ofstream inside the bc code, to save the variables as a CSV, but it does not work.

Any advice?

Will this be useful? https://www.openfoam.com/documentati...bcs-mixed.html

    "(Patch1|Patch2)"
    {                                                                   
       type            codedMixed;                 
       refValue        uniform 0;                 
       refGradient     uniform 0;                 
       valueFraction   uniform 0;                  
                                                   
       name        test;                             
                                                   
       code                                        
       #{                                
                                                                                  
           forAll(this->patch(), faceI)            
           {                                       
               CodeGoes in here
           } 

          Info << (this->refValue()*this->valueFraction() ) + (1-this->valueFraction())*(this->patchInternalField() + this->refGrad()/this->patch().deltaCoeffs()) << endl;
        #}; 
    }