CFD Online Discussion Forums - FOAM FATAL ERROR: cannot find file

Hello.
First, here is my error message.

Code:

sanghoko@ksh:~/OpenFOAM_files/pipeflow_snappyHexMesh$ ls

0  0.orig  Allclean  Allrun  README.md  constant  icoFoam.log  icoFoam2.log  system

sanghoko@ksh:~/OpenFOAM_files/pipeflow_snappyHexMesh$ cd system/

sanghoko@ksh:~/OpenFOAM_files/pipeflow_snappyHexMesh/system$ ls

blockMeshDict  controlDict  createPatchDict  fvSchemes  fvSolution  meshQualityDict  snappyHexMeshDict  topoSetDict

sanghoko@ksh:~/OpenFOAM_files/pipeflow_snappyHexMesh/system$ snappyHexMesh

/*---------------------------------------------------------------------------*\

| =========                 |                                                 |

| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |

|  \\    /   O peration     | Version:  v2012                                 |

|   \\  /    A nd           | Website:  www.openfoam.com                      |

|    \\/     M anipulation  |                                                 |

\*---------------------------------------------------------------------------*/

Build  : _7bdb509494-20201222 OPENFOAM=2012

Arch   : "LSB;label=32;scalar=64"

Exec   : snappyHexMesh

Date   : Jul 05 2022

Time   : 11:06:58

Host   : ksh

PID    : 788

I/O    : uncollated

Case   : /home/sanghoko/OpenFOAM_files/pipeflow_snappyHexMesh/system

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







--> FOAM FATAL ERROR: (openfoam-2012)

cannot find file "/home/sanghoko/OpenFOAM_files/pipeflow_snappyHexMesh/system/system/controlDict"



    From virtual Foam::autoPtr<Foam::ISstream> Foam::fileOperations::uncollatedFileOperation::readStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const

    in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 547.



FOAM exiting

I got this error.
I guess because OpenFOAM is trying to find controlDict file from here

Code:

"/home/sanghoko/OpenFOAM_files/pipeflow_snappyHexMesh/system/system/controlDict"

not at here

Code:

/home/sanghoko/OpenFOAM_files/pipeflow_snappyHexMesh/system/controlDict

, OpenFOAM can't find controlDict file in properly.

How can I let OpenFOAM try to find controlDict file at below?

Code:

"/home/sanghoko/OpenFOAM_files/pipeflow_snappyHexMesh/system/system/controlDict"

Here is my snappyHexMeshDict.

Code:

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



// Which of the steps to run

castellatedMesh true;

snap            true;

addLayers       false;





// Geometry. Definition of all surfaces. All surfaces are of class

// searchableSurface.

// Surfaces are used

// - to specify refinement for any mesh cell intersecting it

// - to specify refinement for any mesh cell inside/outside/near

// - to 'snap' the mesh boundary to the surface

geometry

{

    simple_cylinder.stl

    {

        type triSurfaceMesh;

        name simple_cylinder.stl;

    }



//    refinementBox // user defined region

//    { 

//        type box;

//        min  (-1.0 -0.7 0.0);

//        max  ( 8.0  0.7 2.5);

//    }

}





// Settings for the castellatedMesh generation.

castellatedMeshControls

{





    // Refinement parameters

    // ~~~~~~~~~~~~~~~~~~~~~



    // If local number of cells is >= maxLocalCells on any processor

    // switches from from refinement followed by balancing

    // (current method) to (weighted) balancing before refinement.

    maxLocalCells 100000;



    // Overall cell limit (approximately). Refinement will stop immediately

    // upon reaching this number so a refinement level might not complete.

    // Note that this is the number of cells before removing the part which

    // is not 'visible' from the keepPoint. The final number of cells might

    // actually be a lot less.

    maxGlobalCells 2000000;



    // The surface refinement loop might spend lots of iterations refining just a

    // few cells. This setting will cause refinement to stop if <= minimumRefine

    // are selected for refinement. Note: it will at least do one iteration

    // (unless the number of cells to refine is 0)

    minRefinementCells 10;



    // Allow a certain level of imbalance during refining

    // (since balancing is quite expensive)

    // Expressed as fraction of perfect balance (= overall number of cells /

    // nProcs). 0=balance always.

    maxLoadUnbalance 0.10;





    // Number of buffer layers between different levels.

    // 1 means normal 2:1 refinement restriction, larger means slower

    // refinement.

    nCellsBetweenLevels 3;







    // Explicit feature edge refinement

    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



    // Specifies a level for any cell intersected by its edges.

    // This is a featureEdgeMesh, read from constant/triSurface for now.

    features

    (

//        {

//            file "motorBike.eMesh";

//            level 6;

//        }

    );

Code:

    // Surface based refinement

    // ~~~~~~~~~~~~~~~~~~~~~~~~



    // Specifies two levels for every surface. The first is the minimum level,

    // every cell intersecting a surface gets refined up to the minimum level.

    // The second level is the maximum level. Cells that 'see' multiple

    // intersections where the intersections make an

    // angle > resolveFeatureAngle get refined up to the maximum level.



    refinementSurfaces

    {

        simple_cylinder.stl

        {

            // Surface-wise min and max refinement level

            level (0 2);



            // Optional specification of patch type (default is wall). No

            // constraint types (cyclic, symmetry) etc. are allowed.

          //  patchInfo

          //  {

          //      type wall;

          //      inGroups (motorBikeGroup);

          //  }

        }

    }



    // Resolve sharp angles

    resolveFeatureAngle 30;





    // Region-wise refinement

    // ~~~~~~~~~~~~~~~~~~~~~~



    // Specifies refinement level for cells in relation to a surface. One of

    // three modes

    // - distance. 'levels' specifies per distance to the surface the

    //   wanted refinement level. The distances need to be specified in

    //   descending order.

    // - inside. 'levels' is only one entry and only the level is used. All

    //   cells inside the surface get refined up to the level. The surface

    //   needs to be closed for this to be possible.

    // - outside. Same but cells outside.



    refinementRegions

    {

//        refinementBox

//        {

//            mode inside;

//            levels ((1E15 4));

//        }

    }

Code:



    // Mesh selection

    // ~~~~~~~~~~~~~~



    // After refinement patches get added for all refinementSurfaces and

    // all cells intersecting the surfaces get put into these patches. The

    // section reachable from the locationInMesh is kept.

    // NOTE: This point should never be on a face, always inside a cell, even

    // after refinement.

    locationInMesh (50.91234 0.123450001 10.123443);





    // Whether any faceZones (as specified in the refinementSurfaces)

    // are only on the boundary of corresponding cellZones or also allow

    // free-standing zone faces. Not used if there are no faceZones.

    allowFreeStandingZoneFaces true;

}







// Settings for the snapping.

snapControls

{

    //- Number of patch smoothing iterations before finding correspondence

    //  to surface

    nSmoothPatch 3;



    //- Relative distance for points to be attracted by surface feature point

    //  or edge. True distance is this factor times local

    //  maximum edge length.

    tolerance 2.0;



    //- Number of mesh displacement relaxation iterations.

    nSolveIter 30;



    //- Maximum number of snapping relaxation iterations. Should stop

    //  before upon reaching a correct mesh.

    nRelaxIter 5;



    // Feature snapping



        //- Number of feature edge snapping iterations.

        //  Leave out altogether to disable.

        nFeatureSnapIter 10;



        //- Detect (geometric only) features by sampling the surface

        //  (default=false).

        implicitFeatureSnap true;



        //- Use castellatedMeshControls::features (default = true)

        explicitFeatureSnap false;



        //- Detect points on multiple surfaces (only for explicitFeatureSnap)

        multiRegionFeatureSnap false;

}

Code:

// Settings for the layer addition.

addLayersControls

{

    // Are the thickness parameters below relative to the undistorted

    // size of the refined cell outside layer (true) or absolute sizes (false).

    relativeSizes true;



    // Per final patch (so not geometry!) the layer information

    layers

    {

        "(lowerWall|motorBike).*"

        {

            nSurfaceLayers 1;

        }

    }



    // Expansion factor for layer mesh

    expansionRatio 1.0;



    // Wanted thickness of final added cell layer. If multiple layers

    // is the thickness of the layer furthest away from the wall.

    // Relative to undistorted size of cell outside layer.

    // See relativeSizes parameter.

    finalLayerThickness 0.3;



    // Minimum thickness of cell layer. If for any reason layer

    // cannot be above minThickness do not add layer.

    // Relative to undistorted size of cell outside layer.

    minThickness 0.1;



    // If points get not extruded do nGrow layers of connected faces that are

    // also not grown. This helps convergence of the layer addition process

    // close to features.

    // Note: changed(corrected) w.r.t 1.7.x! (didn't do anything in 1.7.x)

    nGrow 0;



    // Advanced settings



    // When not to extrude surface. 0 is flat surface, 90 is when two faces

    // are perpendicular

    featureAngle 60;



    // At non-patched sides allow mesh to slip if extrusion direction makes

    // angle larger than slipFeatureAngle.

    slipFeatureAngle 30;



    // Maximum number of snapping relaxation iterations. Should stop

    // before upon reaching a correct mesh.

    nRelaxIter 3;



    // Number of smoothing iterations of surface normals

    nSmoothSurfaceNormals 1;



    // Number of smoothing iterations of interior mesh movement direction

    nSmoothNormals 3;



    // Smooth layer thickness over surface patches

    nSmoothThickness 10;



    // Stop layer growth on highly warped cells

    maxFaceThicknessRatio 0.5;



    // Reduce layer growth where ratio thickness to medial

    // distance is large

    maxThicknessToMedialRatio 0.3;



    // Angle used to pick up medial axis points

    // Note: changed(corrected) w.r.t 1.7.x! 90 degrees corresponds to 130

    // in 1.7.x.

    minMedialAxisAngle 90;





    // Create buffer region for new layer terminations

    nBufferCellsNoExtrude 0;





    // Overall max number of layer addition iterations. The mesher will exit

    // if it reaches this number of iterations; possibly with an illegal

    // mesh.

    nLayerIter 50;

}

Code:

// Generic mesh quality settings. At any undoable phase these determine

// where to undo.

meshQualityControls

{

    #include "meshQualityDict"





    // Advanced



    //- Number of error distribution iterations

    nSmoothScale 4;

    //- Amount to scale back displacement at error points

    errorReduction 0.75;

}





// Advanced



// Write flags

writeFlags

(

    scalarLevels

    layerSets

    layerFields     // write volScalarField for layer coverage

);





// Merge tolerance. Is fraction of overall bounding box of initial mesh.

// Note: the write tolerance needs to be higher than this.

mergeTolerance 1e-6;





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

Thank you :)