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tutorials/mesh/foamyHexMesh/simpleShapes/system/collapseDict

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+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      collapseDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+controlMeshQuality      on;
+
+collapseEdgesCoeffs
+{
+    // Edges shorter than this absolute value will be merged
+    minimumEdgeLength   1e-6;
+
+    // The maximum angle between two edges that share a point attached to
+    // no other edges
+    maximumMergeAngle   180;
+}
+
+collapseFacesCoeffs
+{
+    // The initial face length factor
+    initialFaceLengthFactor                 0.5;
+
+    // If the face can't be collapsed to an edge, and it has a span less than
+    // the target face length multiplied by this coefficient, collapse it
+    // to a point.
+    maxCollapseFaceToPointSideLengthCoeff   0.3;
+
+    // Allow early collapse of edges to a point
+    allowEarlyCollapseToPoint               on;
+
+    // Fraction to premultiply maxCollapseFaceToPointSideLengthCoeff by if
+    // allowEarlyCollapseToPoint is enabled
+    allowEarlyCollapseCoeff                 0.2;
+
+    // Defining how close to the midpoint (M) of the projected
+    // vertices line a projected vertex (X) can be before making this
+    // an invalid edge collapse
+    //
+    // X---X-g----------------M----X-----------g----X--X
+    //
+    // Only allow a collapse if all projected vertices are outwith
+    // guardFraction (g) of the distance form the face centre to the
+    // furthest vertex in the considered direction
+    guardFraction                           0.1;
+}
+
+controlMeshQualityCoeffs
+{
+    // Name of the dictionary that has the mesh quality coefficients used
+    // by motionSmoother::checkMesh
+    #include                    "meshQualityDict";
+
+    // The amount that minimumEdgeLength will be reduced by for each
+    // edge if that edge's collapse generates a poor quality face
+    edgeReductionFactor         0.5;
+
+    // The amount that initialFaceLengthFactor will be reduced by for each
+    // face if its collapse generates a poor quality face
+    faceReductionFactor         0.5;
+
+    // Maximum number of smoothing iterations for the reductionFactors
+    maximumSmoothingIterations  2;
+
+    // Maximum number of outer iterations is mesh quality checking is enabled
+    maximumIterations           10;
+
+    // Maximum number of iterations deletion of a point can cause a bad face
+    // to be constructed before it is forced to not be deleted
+    maxPointErrorCount          3;
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/controlDict

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+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version         2.0;
+    format          ascii;
+    location        "system";
+    class           dictionary;
+    object          controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         80;
+
+deltaT          1;
+
+writeControl    timeStep;
+
+writeInterval   80;   // 10 to see the meshing steps
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  10;
+
+writeCompression uncompressed;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable yes;
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/foamyHexMeshDict

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+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version         2.0;
+    format          ascii;
+    class           dictionary;
+    object          foamyHexMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Include defaults parameters from master dictionary
+#include "$WM_PROJECT_DIR/etc/caseDicts/foamyHexMeshDict"
+
+geometry
+{
+    sphere_orient.stl
+    {
+        name sphere;
+        type triSurfaceMesh;
+    }
+
+    cone_orient.stl
+    {
+        name cone;
+        type triSurfaceMesh;
+    }
+
+    // Outside of domain
+    domain
+    {
+        type searchableBox;
+        min (-0.7 -0.9 -1);
+        max (1.3 1.1 1);
+    }
+
+}
+
+
+surfaceConformation
+{
+    locationInMesh (0 -0.5 0);
+
+    featurePointControls
+    {
+        specialiseFeaturePoints off;
+        edgeAiming              off;
+        guardFeaturePoints      off;
+        snapFeaturePoints       off;
+        circulateEdges          off;
+    }
+
+    // Geometry to mesh to
+    geometryToConformTo
+    {
+        cone
+        {
+            featureMethod   extractFeatures;
+            includedAngle   140;
+
+            patchInfo
+            {
+                type        wall;
+                inGroups    (groupConeAndSphere);
+            }
+        }
+
+        sphere
+        {
+            featureMethod   none;
+
+            patchInfo
+            {
+                type        wall;
+                inGroups    (groupConeAndSphere);
+            }
+        }
+
+        domain
+        {
+            featureMethod   extractFeatures;
+            includedAngle   100;
+            mode            outside;
+        }
+    }
+
+    additionalFeatures
+    {
+        coneSphereIntersection
+        {
+            featureMethod           extendedFeatureEdgeMesh;
+            extendedFeatureEdgeMesh "cone_orient_sphere_orient_intersection.extendedFeatureEdgeMesh";
+        }
+    }
+}
+
+
+initialPoints
+{
+    initialPointsMethod         autoDensity;
+
+    autoDensityCoeffs
+    {
+        minCellSizeLimit        0.1;
+        minLevels               4;
+        maxSizeRatio            5.0;
+        sampleResolution        3;
+        surfaceSampleResolution 3;
+    }
+}
+
+
+motionControl
+{
+    defaultCellSize         0.1;
+
+    minimumCellSizeCoeff    0;
+
+    // For background cell size and alignment grid
+    maxSmoothingIterations  100;
+
+    maxRefinementIterations 0;
+
+    shapeControlFunctions
+    {
+        sphere
+        {
+            type                        searchableSurfaceControl;
+            priority                    2;
+            mode                        inside;
+
+            surfaceCellSizeFunction     uniformValue;
+            uniformValueCoeffs
+            {
+                surfaceCellSizeCoeff    0.25;
+            }
+
+            cellSizeFunction            linearDistance;
+            linearDistanceCoeffs
+            {
+                distanceCellSizeCoeff   1;
+                distanceCoeff           2;
+            }
+        }
+
+        cone
+        {
+            type                searchableSurfaceControl;
+            priority            1;
+            mode                bothSides;
+
+            surfaceCellSizeFunction uniformValue;
+            uniformValueCoeffs
+            {
+                surfaceCellSizeCoeff 1;
+            }
+
+            cellSizeFunction        uniform;
+            uniformCoeffs
+            {}
+        }
+
+        domain
+        {
+            type                searchableSurfaceControl;
+            priority            1;
+            mode                bothSides;
+
+            surfaceCellSizeFunction uniformValue;
+            uniformValueCoeffs
+            {
+                surfaceCellSizeCoeff 1;
+            }
+
+            cellSizeFunction        uniform;
+            uniformCoeffs
+            {}
+        }
+    }
+
+    // Output lots and lots of .obj files
+    objOutput                   no;
+
+    // Timing and memory usage.
+    timeChecks                  no;
+}
+
+
+// After simulation, when converting to polyMesh, filter out small faces/edges.
+// Do not change. See cvControls.H
+polyMeshFiltering
+{
+    filterEdges                 on;
+    filterFaces                 on;
+    writeTetDualMesh            false;
+}
+
+
+meshQualityControls
+{
+    #include "meshQualityDict"
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/fvSchemes

@@ -0,0 +1,55 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+d2dt2Schemes
+{
+    default         steadyState;
+}
+
+gradSchemes
+{
+    default         Gauss cubic;
+}
+
+divSchemes
+{
+    default         Gauss cubic;
+}
+
+laplacianSchemes
+{
+    default         Gauss linear uncorrected;
+}
+
+interpolationSchemes
+{
+    default         cubic;
+}
+
+snGradSchemes
+{
+    default         uncorrected;
+}
+
+fluxRequired
+{
+    default         no;
+    D               ;
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/fvSolution

@@ -0,0 +1,41 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    "(D|Dcorr)"
+    {
+        solver          GAMG;
+        tolerance       1e-06;
+        relTol          0.99;
+        smoother        GaussSeidel;
+        cacheAgglomeration  true;
+        nCellsInCoarsestLevel 6;
+        agglomerator    faceAreaPair;
+        mergeLevels     1;
+    }
+}
+
+stressAnalysis
+{
+    nCorrectors     1;
+    D               1e-10;
+    accelerationFactor 2;
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/meshQualityDict

@@ -0,0 +1,65 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version         2.0;
+    format          ascii;
+    class           dictionary;
+    object          meshQualityDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+//- Maximum non-orthogonality allowed. Set to 180 to disable.
+maxNonOrtho         65;
+
+//- Max skewness allowed. Set to <0 to disable.
+maxBoundarySkewness 50;
+maxInternalSkewness 10;
+
+//- Max concaveness allowed. Is angle (in degrees) below which concavity
+//  is allowed. 0 is straight face, <0 would be convex face.
+//  Set to 180 to disable.
+maxConcave          80;
+
+//- Minimum quality of the tet formed by the face-centre
+//  and variable base point minimum decomposition triangles and
+//  the cell centre. This has to be a positive number for tracking
+//  to work. Set to very negative number (e.g. -1E30) to
+//  disable.
+//     <0 = inside out tet,
+//      0 = flat tet
+//      1 = regular tet
+minTetQuality       1e-30;
+
+//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to very negative number (e.g. -1E30) to disable.
+minVol              0;
+
+//- Minimum face area. Set to <0 to disable.
+minArea             -1;
+
+//- Minimum face twist. Set to <-1 to disable. dot product of face normal
+//- and face centre triangles normal
+minTwist            0.001;
+
+//- minimum normalised cell determinant
+//- 1 = hex, <= 0 = folded or flattened illegal cell
+minDeterminant      0.001;
+
+//- minFaceWeight (0 -> 0.5)
+minFaceWeight       0.02;
+
+//- minVolRatio (0 -> 1)
+minVolRatio         0.01;
+
+//must be >0 for Fluent compatibility
+minTriangleTwist    -1;
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/topoSetDict

@@ -0,0 +1,148 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      topoSetDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+actions
+(
+    {
+        name    z;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (-100 -100 0)(100 100 100);
+        }
+    }
+
+    {
+        name    zf;
+        type    faceSet;
+        action  new;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    z;
+            option all;
+        }
+    }
+
+    {
+        name    z;
+        type    cellSet;
+        action  invert;
+    }
+
+    {
+        name    zf;
+        type    faceSet;
+        action  subset;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    z;
+            option all;
+        }
+    }
+
+    // ~~~~~~~~~~~~~~~~ //
+
+    {
+        name    y;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (-100 0.1 -100)(100 100 100);
+        }
+    }
+
+    {
+        name    yf;
+        type    faceSet;
+        action  new;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    y;
+            option all;
+        }
+    }
+
+    {
+        name    y;
+        type    cellSet;
+        action  invert;
+    }
+
+    {
+        name    yf;
+        type    faceSet;
+        action  subset;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    y;
+            option all;
+        }
+    }
+
+    // ~~~~~~~~~~~~~~~~ //
+
+    {
+        name    x;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (0.3 -100 -100)(100 100 100);
+        }
+    }
+
+    {
+        name    xf;
+        type    faceSet;
+        action  new;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    x;
+            option all;
+        }
+    }
+
+    {
+        name    x;
+        type    cellSet;
+        action  invert;
+    }
+
+    {
+        name    xf;
+        type    faceSet;
+        action  subset;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    x;
+            option all;
+        }
+    }
+);
+
+// ************************************************************************* //