[daylen]

Hi, I run snappyHexMesh but stl does not appear.
Steps that i have done:
1. create stl in salome
2. put it in geometry folder
3. modify blockmesh for a smaller domain
4. modify surfacefeaturesdict and snappyhexmeshdict with name of the stl
5. run blockmesh, surfacefeatures and shm.


Im using openfoam v9, modified windaroundbuildings tutorial



i attach relevant files:

surfacesfeaturesdict

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  9
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      surfaceFeaturesDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

surfaces ("cylinder.stl");

#includeEtc "caseDicts/surface/surfaceFeaturesDict.cfg"

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

snappyhexmeshdict

/*--------------------------------*- C++ -*----------------------------------*\
   =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  9
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      snappyHexMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#includeEtc "caseDicts/mesh/generation/snappyHexMeshDict.cfg"

castellatedMesh on;
snap            on;
addLayers       off;

geometry
{
    cylinder
    {
        type triSurfaceMesh;
        file "cylinder.stl";
    }

   /* refinementBox
    {
        type searchableBox;
        min  (  0   0   0);
        max  (250 180  90);
    }*/
};

castellatedMeshControls
{
    features
    (
      { file  "cylinder.eMesh"; level 1; }
    );

    refinementSurfaces
    {
        buildings
        {
            level (3 3);
            patchInfo { type wall; }
        }
    }

    refinementRegions
    {
        refinementBox
        {
            mode    inside;
            level   2;
        }
    }

    locationInMesh (1 1 1);
}

snapControls
{
    explicitFeatureSnap    true;
    implicitFeatureSnap    false;
}

addLayersControls
{
    layers
    {
        "CAD.*"
        {
            nSurfaceLayers 2;
        }
    }

    relativeSizes       true;
    expansionRatio      1.2;
    finalLayerThickness 0.5;
    minThickness        1e-3;
}

meshQualityControls
{}

writeFlags
(
    // scalarLevels
    // layerSets
    // layerFields
);

mergeTolerance 1e-6;

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

blockMesh

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  9
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

backgroundMesh
{
    xMin   -10;//-20; // L = 350
    xMax   10;//330;
    yMin   -10;//-50; // L = 280
    yMax   10;//230;
    zMin   -10;
    zMax   10;//140;
    xCells  10;//25;
    yCells  10;//20;
    zCells  10;//10;
}

convertToMeters 1;

vertices
(
    ($!backgroundMesh/xMin $!backgroundMesh/yMin $!backgroundMesh/zMin)
    ($!backgroundMesh/xMax $!backgroundMesh/yMin $!backgroundMesh/zMin)
    ($!backgroundMesh/xMax $!backgroundMesh/yMax $!backgroundMesh/zMin)
    ($!backgroundMesh/xMin $!backgroundMesh/yMax $!backgroundMesh/zMin)

    ($!backgroundMesh/xMin $!backgroundMesh/yMin $!backgroundMesh/zMax)
    ($!backgroundMesh/xMax $!backgroundMesh/yMin $!backgroundMesh/zMax)
    ($!backgroundMesh/xMax $!backgroundMesh/yMax $!backgroundMesh/zMax)
    ($!backgroundMesh/xMin $!backgroundMesh/yMax $!backgroundMesh/zMax)
);

blocks
(
    hex (0 1 2 3 4 5 6 7)
    (
        $!backgroundMesh/xCells
        $!backgroundMesh/yCells
        $!backgroundMesh/zCells
    )
    simpleGrading (1 1 1)
);

boundary
(
    inlet
    {
        type patch;
        faces
        (
            (0 3 7 4)
        );
    }

    outlet
    {
        type patch;
        faces
        (
            (1 5 6 2)
        );
    }

    ground
    {
        type wall;
        faces
        (
            (0 1 2 3)
        );
    }

    frontAndBack
    {
        type symmetry;
        faces
        (
            (0 4 5 1)
            (3 2 6 7)
            (4 7 6 5)
        );
    }

);

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

[matejfor]

In your snappyHexMeshDict in section refinementSurfaces - you forgot to update the surface names. your stl is called cylinder, but you are having buildings surface name in refinementSurfaces.

Make this consistent and things should be better.

[daylen]

wow it works!, thank you