CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Floating point exception - interFoam, kOmegaSST

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 8, 2022, 20:33
Default Floating point exception - interFoam, kOmegaSST
  #1
New Member
 
Zulkar Nayem
Join Date: May 2016
Location: Dhaka, Bangladesh
Posts: 6
Rep Power: 10
nayem.cosmic is on a distinguished road
Hello everyone
I am trying to calculate resistance of wigley hull with interFoam solver in OpenFOAM 9. Used following base case.
tutorials/multiphase/interFoam/RAS/DTCHull
Just changed the geometry stl file and changed relevant values in some files.

Run the solver in single core. Solver is giving the following error after running 80-90 time steps.
Code:
#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigFpe::sigHandler(int) at ??:?
#2  ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3  Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > Foam::magSqr<Foam::SymmTensor<double>, Foam::fvPatchField, Foam::volMesh>(Foam::tmp<Foam::GeometricField<Foam::SymmTensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) at ??:?
#4  Foam::kOmegaSST<Foam::eddyViscosity<Foam::RASModel<Foam::IncompressibleMomentumTransportModel<Foam::kinematicTransportModel> > >, Foam::IncompressibleMomentumTransportModel<Foam::kinematicTransportModel> >::correct() at ??:?
#5  ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
#6  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#7  ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/interFoam"
Floating point exception (core dumped)
Have checked the mesh. It prints OK.
Code:
Mesh stats
    points:           1826029
    faces:            5286320
    internal faces:   5205924
    cells:            1731246
    faces per cell:   6.06052
    boundary patches: 7
    point zones:      0
    face zones:       0
    cell zones:       0

Overall number of cells of each type:
    hexahedra:     1638870
    prisms:        7727
    wedges:        0
    pyramids:      0
    tet wedges:    0
    tetrahedra:    0
    polyhedra:     84649
    Breakdown of polyhedra by number of faces:
        faces   number of cells
            4   1403
            5   1230
            6   1458
            7   62037
            8   1069
            9   17452

Checking topology...
    Boundary definition OK.
    Cell to face addressing OK.
    Point usage OK.
    Upper triangular ordering OK.
    Face vertices OK.
    Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces...
                   Patch    Faces   Points                  Surface topology
              atmosphere      798      860  ok (non-closed singly connected)
                   inlet     3382     3580  ok (non-closed singly connected)
                  outlet     3382     3580  ok (non-closed singly connected)
                  bottom      798      860  ok (non-closed singly connected)
                    side     7476     7697  ok (non-closed singly connected)
                midPlane    29595    30776  ok (non-closed singly connected)
                    hull    34965    36843  ok (non-closed singly connected)

Checking geometry...
    Overall domain bounding box (-26 -19 -16) (16 3.51072e-12 4)
    Mesh has 3 geometric (non-empty/wedge) directions (1 1 1)
    Mesh has 3 solution (non-empty) directions (1 1 1)
    Boundary openness (3.66952e-16 1.95783e-15 -1.02697e-16) OK.
    Max cell openness = 4.12411e-16 OK.
    Max aspect ratio = 71.827 OK.
    Minimum face area = 1.26253e-05. Maximum face area = 1.00711.  Face area magnitudes OK.
    Min volume = 7.66276e-08. Max volume = 0.934091.  Total volume = 15957.3.  Cell volumes OK.
    Mesh non-orthogonality Max: 69.9801 average: 5.7433
    Non-orthogonality check OK.
    Face pyramids OK.
    Max skewness = 3.99295 OK.
    Coupled point location match (average 0) OK.

Mesh OK.
fvScheme file:
Code:
ddtSchemes
{
    default         localEuler;
}

gradSchemes
{
    default         Gauss linear;
    limitedGrad     cellLimited Gauss linear 1;
}

divSchemes
{
    div(rhoPhi,U)   Gauss linearUpwind grad(U);
    div(phi,alpha)  Gauss interfaceCompression vanLeer 1;
    div(phi,k)      Gauss linearUpwind limitedGrad;
    div(phi,omega)  Gauss linearUpwind limitedGrad;
    div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
}

laplacianSchemes
{
    default         Gauss linear corrected;
}

interpolationSchemes
{
    default         linear;
}

snGradSchemes
{
    default         corrected;
}

wallDist
{
    method meshWave;
}
fvSolution file:
Code:
solvers
{
    "alpha.water.*"
    {
        nAlphaCorr      2;
        nAlphaSubCycles 1;

        MULESCorr       yes;
        nLimiterIter    10;
        alphaApplyPrevCorr  yes;

        solver          smoothSolver;
        smoother        symGaussSeidel;
        tolerance       1e-8;
        relTol          0;
        minIter         1;
    }

    "pcorr.*"
    {
        solver          PCG;

        preconditioner
        {
            preconditioner  GAMG;

            smoother        GaussSeidel;

            tolerance       1e-5;
            relTol          0;
        };

        tolerance       1e-5;
        relTol          0;
    };

    p_rgh
    {
        solver          GAMG;

        smoother        DIC;

        tolerance       1e-7;
        relTol          0.01;
    };

    p_rghFinal
    {
        $p_rgh;
        relTol          0;
    }

    "(U|k|omega).*"
    {
        solver          smoothSolver;

        smoother        symGaussSeidel;
        nSweeps         1;

        tolerance       1e-7;
        relTol          0.1;
        minIter         1;
    };
}

PIMPLE
{
    momentumPredictor   no;

    nOuterCorrectors    1;
    nCorrectors         2;
    nNonOrthogonalCorrectors 0;

    maxCo               10;
    maxAlphaCo          5;

    rDeltaTSmoothingCoeff 0.05;
    rDeltaTDampingCoeff 0.5;
    nAlphaSpreadIter    0;
    nAlphaSweepIter     0;
    maxDeltaT           1;
}

relaxationFactors
{
    equations
    {
        ".*" 1;
    }
}

cache
{
    grad(U);
}
Please find interFoam log file in attachment.
Also find the case directory here.

I am new to OpenFOAM. Can you help me?
Thanks.
Attached Files
File Type: txt logInterFoam.txt (23.5 KB, 2 views)

Last edited by nayem.cosmic; March 9, 2022 at 19:40.
nayem.cosmic is offline   Reply With Quote

Old   March 9, 2022, 19:41
Default
  #2
New Member
 
Zulkar Nayem
Join Date: May 2016
Location: Dhaka, Bangladesh
Posts: 6
Rep Power: 10
nayem.cosmic is on a distinguished road
Update:
Solved my issue.
Changed relaxation factor to below 1 in fvSolution file.
Code:
relaxationFactors
{
    equations
    {
        ".*" 0.7;
    }
}
nayem.cosmic is offline   Reply With Quote

Old   November 22, 2023, 04:54
Default
  #3
New Member
 
Chandra Napitupulu
Join Date: Nov 2023
Posts: 6
Rep Power: 2
chandrana70 is on a distinguished road
Quote:
Originally Posted by nayem.cosmic View Post
Update:
Solved my issue.
Changed relaxation factor to below 1 in fvSolution file.
Code:
relaxationFactors
{
    equations
    {
        ".*" 0.7;
    }
}
I'm just wondering, why should be it at 0.7? I've tried my submarine simulation, and the last solver, it gives the same error. could you tell me?
Attached Files
File Type: txt log_interFoam.txt (99.8 KB, 0 views)

Last edited by chandrana70; November 22, 2023 at 19:56.
chandrana70 is offline   Reply With Quote

Old   November 22, 2023, 06:05
Default
  #4
New Member
 
Zulkar Nayem
Join Date: May 2016
Location: Dhaka, Bangladesh
Posts: 6
Rep Power: 10
nayem.cosmic is on a distinguished road
There is no fixed value as far as I know. You might lower the value and try.
nayem.cosmic is offline   Reply With Quote

Old   November 22, 2023, 19:57
Default
  #5
New Member
 
Chandra Napitupulu
Join Date: Nov 2023
Posts: 6
Rep Power: 2
chandrana70 is on a distinguished road
Quote:
Originally Posted by nayem.cosmic View Post
There is no fixed value as far as I know. You might lower the value and try.

Ahh I see. Thanks for your enlightenment
chandrana70 is offline   Reply With Quote

Reply

Tags
interfoam hull, komega sst model, resistance estimation, wigleyhull

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Understanding The Floating Point Exception Error Message RussellHolt OpenFOAM Running, Solving & CFD 2 August 6, 2022 00:00
rhoCentralFoam - kOmegaSST - Floating point exception DGW OpenFOAM Running, Solving & CFD 1 September 1, 2016 07:45
A floating point exception - SEM Model yansheng STAR-CCM+ 1 April 4, 2016 04:57
Floating point exception from twoPhaseEulerFoam openfoammaofnepo OpenFOAM Running, Solving & CFD 1 March 19, 2016 13:56
k-e & GAMG interFoam Schemitisation Stability Issue JFM OpenFOAM Running, Solving & CFD 3 December 1, 2015 05:58


All times are GMT -4. The time now is 09:52.