[rudyy]

Hello,

I'm trying to work through the OpenFOAM tutorials and am frustratingly stuck on the second one. I'm able to mesh and apparently solve without errors, but in ParaView I cannot generate any results (streamlines, p/U fields, etc). Here is what I'm working with:

Version: OpenFOAM v. 2112 running on WSL Ubuntu 20.04.4
Tutorial: basic/potentialFoam/cylinder folder is copied to an OpenFOAM directory in my home folder
Meshing: After running blockMesh I opened the file in ParaView and confirmed the mesh looks as expected and the walls are correctly named.
BCs: See below
Solver: See output from the solver below
Notes:
- I have solved the cavity tutorial and successfully processed p/U fields in ParaView, so I don't believe the issue is translating to the post-processor
- I changed the "nNonOrthogonalCorrectors" designation to Zero as per the tutorial's suggestion. I also tried with designation 3 and got same result.
- I have checked the fvSolution file and confirmed that potentialFlow is referenced (another question on this forum had this issue)
- I did rename the folder "0.orig" to "0" and delete the .orig directory
- I tried another attempt by running the "Allrun" file before touching anything in the directory with same results.

Does anyone have a suggestion? Is there more information I can provide that would help diagnost this?

Thank you kindly

BCs:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2112                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    down
    {
        type            symmetryPlane;
    }

    right
    {
        type            zeroGradient;
    }

    up
    {
        type            symmetryPlane;
    }

    left
    {
        type            uniformFixedValue;
        uniformValue    constant (1 0 0);
    }

    cylinder
    {
        type            symmetry;
    }

    defaultFaces
    {
        type            empty;
    }
}


// ************************************************************************* //

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2112                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    down
    {
        type            symmetryPlane;
    }

    right
    {
        type            fixedValue;
        value           uniform 0;
    }

    up
    {
        type            symmetryPlane;
    }

    left
    {
        type            zeroGradient;
    }

    cylinder
    {
        type            symmetry;
    }

    defaultFaces
    {
        type            empty;
    }
}


// ************************************************************************* //

Output:

user@username-redacted:~/OpenFOAM/cylinder$ potentialFoam
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2112                                  |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : _80318542-20220301 OPENFOAM=2112 patch=220310 version=2112
Arch   : "LSB;label=32;scalar=64"
Exec   : potentialFoam
Date   : Jun 13 2022
Time   : 15:22:50
Host   : username-redacted
PID    : 794
I/O    : uncollated
Case   : /home/user/OpenFOAM/cylinder
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0


potentialFlow: Operating solver in PISO mode

Reading velocity field U

Constructing pressure field p

Constructing velocity potential field Phi

No MRF models present


Calculating potential flow
GAMG:  Solving for Phi, Initial residual = 1, Final residual = 0.00645988, No Iterations 5
Continuity error = 0.00169825
Interpolated velocity error = 0.000131161
ExecutionTime = 0.03 s  ClockTime = 0 s

End

[UserOfThisForum]

Hi I have faced the same issue. It turned out to be a simple solution: just uncheck "Skip Zero Time" in the properties pane in ParaView.

Looks like potentialFoam is used to create consistent boundary and initial conditions for other solvers. For that reason potentialFoam results are saved to 0/ directory

Cheers

[rudyy]

Thank you! I did end up figuring that out but forgot to update here.

[sstevenson638]

I had the same problem. Thanks for helping!