うまくparaViewで可視化されません

[k y]

お世話になっております。最近openFoamを始めた者です。

計算領域の直方体内部に直方体をいくつか作りだし、snappyHexMeshでメッシュを作り出す作業を行っています。以下のような感じです。

（実験の目的としては上から流体を流し、障害物を経由してどのような速度分布で下に到達するか？シミュレーションしたい。LESモデルを使おうと思います）

添付ファイルでは3個直方体が挿入されていますが、最終的に13個入れたいと考えています。実際にFreeCAD上で直方体を作り、13個のstlファイルを作成し計算を実行しましたが、FreeCADで作成した直方体がparaViewに可視化されてしまいます。これも添付します（計算もなぜか早く、エラーもなし）

なぜ13個の直方体が挿入されずに、挿入されるはずの直方体1個だけparaViewで可視化されるのでしょうか？　snappyHexMeshDict内のパラメーターの調整など行いましたがどうしても分かりません。

以下に実際に作成したsnappyHexMeshDictを載せます。挿入する直方体はblock1～13.stlと定義しています。　ご教授いただけたら幸いです。よろしくお願い致します。

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  5                                     |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      snappyHexMeshDict;
}

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

// Which of the steps to run
castellatedMesh true;
snap            true;
addLayers       true;


// 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
{
    block1
    {
        type triSurfaceMesh;
        file "block1.stl";
    }

    block2
    {
        type triSurfaceMesh;
        file "block2.stl";
    }
   
    block3
    {
        type triSurfaceMesh;
        file "block3.stl";
    }   
   
    block4
    {
        type triSurfaceMesh;
        file "block4.stl";
    }

    block5
    {
        type triSurfaceMesh;
        file "block5.stl";
    }
   
    block6
    {
        type triSurfaceMesh;
        file "block6.stl";
    }   

    block7
    {
        type triSurfaceMesh;
        file "block7.stl";
    }

    block8
    {
        type triSurfaceMesh;
        file "block8.stl";
    }
   
    block9
    {
        type triSurfaceMesh;
        file "block9.stl";
    }   
   
    block10
    {
        type triSurfaceMesh;
        file "block10.stl";
    }

    block11
    {
        type triSurfaceMesh;
        file "block11.stl";
    }
   
    block12
    {
        type triSurfaceMesh;
        file "block12.stl";
    }   

    block13
    {
        type triSurfaceMesh;
        file "block13.stl";
    }  
};



// 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 0;

    // Number of buffer layers between different levels.
    // 1 means normal 2:1 refinement restriction, larger means slower
    // refinement.
    nCellsBetweenLevels 1;



    // 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
    (
    );



    // 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
    {
        block1
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block2
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block3
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
        block4
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block5
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block6
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
        block7
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block8
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block9
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
        block10
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block11
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
       
        block12
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }

        block13
        {
            // Surface-wise min and max refinement level
            level (2 2);
        }
    }

    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
    {
        refineHole
        {
            mode inside;
            levels ((1E15 3));
        }
    }


    // 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.
    // This is an outside point locationInMesh (-0.033 -0.033 0.0033);
    locationInMesh (0.01 0.01 0.01); // Inside point

    // 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 1.0;

    //- Number of mesh displacement relaxation iterations.
    nSolveIter 300;

    //- 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) features by sampling the surface
        implicitFeatureSnap false;

        //- Use castellatedMeshControls::features
        explicitFeatureSnap true;

        //- Detect features between multiple surfaces
        //  (only for explicitFeatureSnap, default = false)
        multiRegionFeatureSnap true;
}



// 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
    {
        "block1*"
        {
            nSurfaceLayers 2;
        }
        "block2*"
        {
            nSurfaceLayers 2;
        }
        "block3*"
        {
            nSurfaceLayers 2;
        }
        "block4*"
        {
            nSurfaceLayers 2;
        }
        "block5*"
        {
            nSurfaceLayers 2;
        }
        "block6*"
        {
            nSurfaceLayers 2;
        }
        "block7*"
        {
            nSurfaceLayers 2;
        }
        "block8*"
        {
            nSurfaceLayers 2;
        }
        "block9*"
        {
            nSurfaceLayers 2;
        }
        "block10*"
        {
            nSurfaceLayers 2;
        }
        "block11*"
        {
            nSurfaceLayers 2;
        }
        "block12*"
        {
            nSurfaceLayers 2;
        }
        "block13*"
        {
            nSurfaceLayers 2;
        }
       
    }
       
    // 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.
    // See relativeSizes parameter.
    minThickness 0.25;

    // 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.
    nGrow 0;


    // Advanced settings

    // When not to extrude surface. 0 is flat surface, 90 is when two faces
    // are perpendicular
    featureAngle 30;

    // Maximum number of snapping relaxation iterations. Should stop
    // before upon reaching a correct mesh.
    nRelaxIter 5;

    // 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
    minMedianAxisAngle 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;

    // Max number of iterations after which relaxed meshQuality controls
    // get used. Up to nRelaxIter it uses the settings in meshQualityControls,
    // after nRelaxIter it uses the values in meshQualityControls::relaxed.
    nRelaxedIter 20;
}



// Generic mesh quality settings. At any undoable phase these determine
// where to undo.
meshQualityControls
{
    #include "meshQualityDict"

    // Optional : some meshing phases allow usage of relaxed rules.
    // See e.g. addLayersControls::nRelaxedIter.
    relaxed
    {
        //- Maximum non-orthogonality allowed. Set to 180 to disable.
        maxNonOrtho 75;
    }

    // Advanced

    //- Number of error distribution iterations
    nSmoothScale 4;
    //- Amount to scale back displacement at error points
    errorReduction 0.75;
}


// Advanced

// Write flags
writeFlags
(
    scalarLevels    // write volScalarField with cellLevel for postprocessing
    layerSets       // write cellSets, faceSets of faces in layer
    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;


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

[はんままにあ]

はんままにあです。

locationInMeshが直方体の内部に定義されていたりしないでしょうか？

locationInMeshが存在している側をsnappyHexMeshは分割するので、例えばparaviewのsourceでpoint sourceを作成してlocationInMeshの座標を入力したときにどこにpointが出るか見てみてください。

次の資料の42ページ目にlocationInMeshのイメージがあります。

https://www.slideshare.net/mobile/mmer547/r4-35383697

[藤井 祐輔]

はんままにあ様

該当部分を検討しなおした所、少し被っていたことが分かりました。paraviewのsource機能存じ上げませんでしたので、活用していこうと思います。

ありがとございます。

2020年6月17日(水) 18:31 はんままにあ <hamma...@gmail.com>:

--
このメールは Google グループのグループ「OpenFOAM」の登録者に送られています。
このグループから退会し、グループからのメールの配信を停止するには openfoam+u...@googlegroups.com にメールを送信してください。
このディスカッションをウェブ上で閲覧するには、https://groups.google.com/d/msgid/openfoam/9e28cd1f-69eb-4062-818d-8fdc791e3e30o%40googlegroups.com にアクセスしてください。