[harsha002]

Hello everyone,

I am running an spray injection simulation in openfoam v2312. The solver I am using is sprayfoam. For the Lagrangian phase change model I want to implement liquidevapfuchsknudsencoeff. But unfortunately I could find the co-efficient available for this model.
below is the error it throws when I run my simulation.

--> FOAM FATAL IO ERROR: (openfoam-2312)
[4] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[4]
[4]
[4] file: stream/subModels at line 0.
[4]
[4] From [0]
[0]
[0] --> FOAM FATAL IO ERROR: (openfoam-2312)
[0] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "constant/sprayCloudProperties/subModels"
[0]
[0]
[0] file: constant/sprayCloudProperties/subModels at line 56 to 180.
[0]
[0] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[0] in file db/dictionary/dictionary.C at line 457.
const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[4] in file db/dictionary/dictionary.C at line 457.
[4]
FOAM parallel run exiting
[4]
[2]
[2]
[2] --> FOAM FATAL IO ERROR: (openfoam-2312)
[2] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[2]
[2]
[2] [0]
FOAM parallel run exiting
[0]
file: stream/subModels at line 0.
[2]
[2] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[2] in file db/dictionary/dictionary.C at line 457.
[2]
FOAM parallel run exiting
[2]
[5] [7]

[7]
[7] --> FOAM FATAL IO ERROR: (openfoam-[5]
[5] --> FOAM FATAL IO ERROR: (openfoam-2312)
[5] 2312)
[7] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[7]
[7]
[7] [3]
[3]
file: stream/subModels at line 0.
[7] [6]
[6]
[6] --> FOAM FATAL IO ERROR: Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[5]
[5]
[5] file: stream/subModels at line 0.
[5]
[5] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const[3] --> FOAM FATAL IO ERROR: (openfoam-2312)
[3] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[3]
[3]
[3] file:
[7] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[7] in file db/dictionary/dictionary.C at line 457.
[7]
FOAM parallel run exiting
[7]
(openfoam-2312)
[6] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[6]
[6]
[6] file: stream/subModels at line 0.stream/subModels at line 0.
[3]
[3] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[3] in file db/dictionary/dictionary.C at line 457.
[5] in file db/dictionary/dictionary.C at line 457.
[5]
FOAM parallel run exiting
[5]

[6]
[6] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[6] in file db/dictionary/dictionary.C at line 457.
[6]
FOAM parallel run exiting
[6]
[3]
FOAM parallel run exiting
[3]

[1]
[1]
[1] --> FOAM FATAL IO ERROR: (openfoam-2312)
[1] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[1]
[1]
[1] file: stream/subModels at line 0.
[1]
[1] From const Foam::dictionary& Foam::dictionary::subDict(const Foam::word&, Foam::keyType:ption) const
[1] in file db/dictionary/dictionary.C at line 457.
[1]
FOAM parallel run exiting
[1]

[tomf]

Hi,

There are several ways to find out what is necessary to be filled in. The error here:

[4] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "stream/subModels"
[4]
[4]
[4] file: stream/subModels at line 0.
[4]
[4] From [0]
[0]
[0] --> FOAM FATAL IO ERROR: (openfoam-2312)
[0] Entry 'liquidEvapFuchsKnudsenCoeffs' not found in dictionary "constant/sprayCloudProperties/subModels"
[0]
[0]
[0] file: constant/sprayCloudProperties/subModels at line 56 to 180.

basically tells you that OpenFOAM expects something in the subModels part of your file constant/sprayProperties and that this should be between lines 56 and 180 of that file, which I am guessing are the lines with { and } for the subModels subDict in that file.

Then what it expects to be found there can be gathered from the source code.

If you read there, some entries are there that lookup something from the coeffDict, in this case it looks for:

    gamma_(this->coeffDict().getScalar("gamma")),
    alpha_(this->coeffDict().getScalar("alpham")),
    solution_(this->coeffDict().lookup("solution")),

and further down:

        const word activityCoefficienType
        (
            this->coeffDict().getWord("activityCoefficient")
        );

        if (activityCoefficienType == "Hoff")
        {
            method_ = pHoff;
        }
        else if (activityCoefficienType == "UNIFAC")
        {
            method_ = pUNIFAC;
        }
        else
        {
            FatalErrorInFunction
                << "activityCoefficient must be either 'Hoff' or 'UNIFAC'"
                << nl << exit(FatalError);
        }

I have no idea what these entries would mean, or what the values should be for the model, I will leave that up to you. My expectation would be that you need something like this in the subModels part in constant/cloudProperties:

    liquidEvapFuchsKnudsenCoeffs
    {
        activityCoefficient Hoff; // or UNIFAC
        gamma 2.5; 
        alpham 0.5;
        solution (liquid solid);
    }

The solution entry is based on this part of the code:

    if (solution_.size() > 2)
    {
        FatalErrorInFunction
            << "Solution is not well defined. It should be (liquid solid)"
            << nl <<  exit(FatalError);
    }

Again, I have no clue what this model does or defines exactly, just reading code and translating into instructions. So please do not just copy these values blindly, I just expect that this is the required format.

Hope this helps,
Tom

[harsha002]

HI Tom,

Thank you for your reply. I fixed the issues, and I am able to run the simulation now.

I downloaded an tutorial problem and added the missing the lines and files to make it run without any issues.

thanks once again.