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Ambiguity error while compiling modified solver

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Old   June 8, 2021, 17:16
Default Ambiguity error while compiling modified solver
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Deshik
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Hi all!!
I have followed a tutorial by Martin Anderson (Chalmers). (http://www.tfd.chalmers.se/~hani/kur...ChangeFoam.pdf) I have modified everything according to his report and I was getting good results till the last step which is replacing the static saturation pressure to saturation pressure that varies with temperature.
Till now I am able to add temperature field to the solver but when I have replaced Psat with Psat (variable with temperature), I am getting a compilation error. (I just entered 'wmake' command)

Here is the output I am getting while compilation of code..,
I have also attached the screenshot.


Code:
Making dependency list for source file myInterPhaseChangeFoam.C
g++ -std=c++11 -m64 -Dlinux64 -DWM_ARCH_OPTION=64 -DWM_DP -DWM_LABEL_SIZE=32 -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-attributes -O3  -DNoRepository -ftemplate-depth-100 -I. -I/opt/openfoam8/src/transportModels/lnInclude -I/opt/openfoam8/src/twoPhaseModels/twoPhaseMixture/lnInclude -I/opt/openfoam8/src/twoPhaseModels/interfaceProperties/lnInclude -I/opt/openfoam8/src/twoPhaseModels/incompressibleTwoPhaseMixture/lnInclude -I/opt/openfoam8/src/twoPhaseModels/immiscibleIncompressibleTwoPhaseMixture/lnInclude -IphaseChangeTwoPhaseMixtures/lnInclude -I/opt/openfoam8/src/MomentumTransportModels/momentumTransportModels/lnInclude -I/opt/openfoam8/src/MomentumTransportModels/incompressible/lnInclude -I/opt/openfoam8/src/finiteVolume/lnInclude -I/opt/openfoam8/src/dynamicFvMesh/lnInclude -I/opt/openfoam8/src/meshTools/lnInclude -I/opt/openfoam8/src/OpenFOAM/lnInclude -IlnInclude -I. -I/opt/openfoam8/src/OpenFOAM/lnInclude -I/opt/openfoam8/src/OSspecific/POSIX/lnInclude   -fPIC -c myInterPhaseChangeFoam.C -o Make/linux64GccDPInt32Opt/myInterPhaseChangeFoam.o
In file included from myInterPhaseChangeFoam.C:50:
phaseChangeTwoPhaseMixtures/lnInclude/phaseChangeTwoPhaseMixture.H: In member function ‘const volScalarField& Foam::phaseChangeTwoPhaseMixture::pSat() const’:
phaseChangeTwoPhaseMixtures/lnInclude/phaseChangeTwoPhaseMixture.H:129:42: error: reference to ‘alpha1_’ is ambiguous
  129 |             const volScalarField& pSat = alpha1_.db().lookupObject<volScalarField>("pSat");
      |                                          ^~~~~~~
In file included from /opt/openfoam8/src/twoPhaseModels/immiscibleIncompressibleTwoPhaseMixture/lnInclude/immiscibleIncompressibleTwoPhaseMixture.H:39,
                 from phaseChangeTwoPhaseMixtures/lnInclude/phaseChangeTwoPhaseMixture.H:38,
                 from myInterPhaseChangeFoam.C:50:
/opt/openfoam8/src/twoPhaseModels/interfaceProperties/lnInclude/interfaceProperties.H:69:31: note: candidates are: ‘const volScalarField& Foam::interfaceProperties::alpha1
’
   69 |         const volScalarField& alpha1_;
      |                               ^~~~~~~
In file included from /opt/openfoam8/src/twoPhaseModels/incompressibleTwoPhaseMixture/lnInclude/incompressibleTwoPhaseMixture.H:40,
                 from /opt/openfoam8/src/twoPhaseModels/immiscibleIncompressibleTwoPhaseMixture/lnInclude/immiscibleIncompressibleTwoPhaseMixture.H:38,
                 from phaseChangeTwoPhaseMixtures/lnInclude/phaseChangeTwoPhaseMixture.H:38,
                 from myInterPhaseChangeFoam.C:50:
/opt/openfoam8/src/twoPhaseModels/twoPhaseMixture/lnInclude/twoPhaseMixture.H:58:24: note:                 ‘Foam::volScalarField Foam::twoPhaseMixture::alpha1_’
   58 |         volScalarField alpha1_;
      |                        ^~~~~~~
In file included from myInterPhaseChangeFoam.C:50:
phaseChangeTwoPhaseMixtures/lnInclude/phaseChangeTwoPhaseMixture.H:129:82: error: expected primary-expression before ‘>’ token
  129 |             const volScalarField& pSat = alpha1_.db().lookupObject<volScalarField>("pSat");
      |                                                                                  ^
make: *** [/opt/openfoam8/wmake/rules/General/transform:26: Make/linux64GccDPInt32Opt/myInterPhaseChangeFoam.o] Error 1
What I understood was that alpha1_ is defined twice in the header files (twoPhaseMixture.H and interfaceProperties.H) that were included in mainsolver code (myInterPhaseChangeFoam.C) and alpha1_ is called next to these header files. Which means the next header file doesn't know which alpha1_ to use.
I am a beginner in programming. Please help me......
Thanks
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Last edited by sherlock45; June 10, 2021 at 09:40.
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Old   April 6, 2022, 03:41
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Prithvi
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Hi sherlock45,


Were you able to resolve this?
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Old   May 4, 2022, 04:20
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I was facing the same problem like OP and I wasnt able to explain this for myself, because in the more derivative class "immiscibleIncompressibleTwoPhaseMixture.H" was done basicly the same, just by having your class in between.


Long story short: Since the compiler is complaining about ambigiouity Iwas wondering why it worked for immiscibleIncompressibleTwoPhaseMixture.H I tried to put another class afterwards and THEN inherit from interfaceProperties and it worked.




My presumption in this case is, because both classes have defined alpha1_ and alpha2_ (one as variable (protected) the other as a const reference variable but as private member), normally I wouldnt expect any errors here but since there is an error.. yeah.. I believe there are two options to solve this problem: either by specifing which alpha is meant with twoPhaseMixture::alpha1_ or twoPhaseMixture::alpha1() or by putting a class before inheriting from interfaceProperties, where no member function is defined that wants access to a alpha value!
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Last edited by überschwupper; May 10, 2022 at 02:22.
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alpha1_, ambiguity, custom solver, error, interphasechangefoam

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