CFD Online Discussion Forums - Question about codeData in a codedFunctionObject

I have following coded function object:

Code:





    centerOfGravityAir

    {

        libs        ("libutilityFunctionObjects.so");



        type coded;

        // Name of on-the-fly generated functionObject

        name writeCenterOfGravityAir;

        writeControl  timeStep;

        

        executeControl timeStep;

        

        codeOptions

        #{

            -I$(LIB_SRC)/finiteVolume/lnInclude \

            -I$(LIB_SRC)/OpenFOAM/lnInclude

        #};





        codeInclude

        #{

            #include "volFieldsFwd.H"

            #include "OFstream.H"

        #};

        

        codeData

        #{

              fileName outPutDir;

              std::ofstream fout;

              autoPtr<OFstream> outputFilePtr;

        #};

            

        codeRead

        #{

           

             outputFilePtr.reset(new OFstream("centerOfGravityAir.dat"));

             fout.open("centerOfGravityAir.txt");

           

        #};

        

        codeExecute

        #{

        

             const volScalarField& alpha1 = mesh().lookupObject<volScalarField>("alpha.water");

             

             scalar alphaTot (0.0);

             scalar cOG (0.0);

             

             

             forAll(alpha1,cellI)

             {

                 alphaTot += 1.0 - alpha1[cellI];

                 cOG += (1.0 - alpha1[cellI])*alpha1.mesh().C()[cellI].z();

             }

             

             reduce(alphaTot, sumOp<scalar>());

             reduce(cOG, sumOp<scalar>());

             

             cOG /= alphaTot;

            

             if (Pstream::myProcNo() == 0)

             {

            

                 fout << mesh().time().timeName() << " " << cOG << endl;

                 outputFilePtr() << mesh().time().timeName() << " " << cOG << endl;

             }

             

             Info << "cog = "  << mesh().time().timeName() << " " << cOG << endl;

             

        #};

        

        codeWrite

        #{



        #};

    }

I have a two-phase flow simulation with a bubble exiting from an orifice.

The purpose of the function object is to write the center of gravity in z-direction of the air to a file.

I have two file: one centerOfGravity.dat and one centerofGravity.txt.

centerofGravity.txt is opened with an ofstream of c++ and the other one with and autoPtr<OFstream>. For the latter works and the former not.

Apparently the reference to the variable gets somewhere lost if an std::ofstream is used but not in the case of autoPtr<OFstream>.

My question is: why is this so?

Best

Michael