STYLE: Change name from cvMesh to foamyHexMesh

tutorials/mesh/foamyHexMesh/blob/Allclean

@@ -0,0 +1,14 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+
+rm -rf constant/cellAlignments > /dev/null 2>&1
+rm -rf constant/targetCellSize > /dev/null 2>&1
+rm -rf constant/internalDelaunayVertices > /dev/null 2>&1
+
+
+# ----------------------------------------------------------------- end-of-file

tutorials/mesh/foamyHexMesh/blob/Allrun

@@ -0,0 +1,11 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+runApplication foamyHexMesh
+runApplication collapseEdges -latestTime -collapseFaces
+runApplication checkMesh -latestTime -allGeometry -allTopology
+
+# ----------------------------------------------------------------- end-of-file

tutorials/mesh/foamyHexMesh/blob/Allrun-parallel

@@ -0,0 +1,19 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+# Get the number of processors to run on from system/decomposeParDict
+nProc=$(getNumberOfProcessors)
+
+runApplication blockMesh
+runApplication decomposePar
+
+runParallel foamyHexMesh $nProc
+runParallel collapseEdges $nProc -latestTime -collapseFaces
+runParallel checkMesh $nProc -latestTime -allTopology -allGeometry
+
+runApplication reconstructParMesh -latestTime
+
+# ----------------------------------------------------------------- end-of-file

tutorials/mesh/foamyHexMesh/blob/Alltest

@@ -0,0 +1,18 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+runApplication foamyHexMesh
+
+# Change collapseEdges to only do one iteration
+cp system/collapseDict system/collapseDict.org
+
+sed -e s/"\(maximumIterations[ \t]*\)\([0-9]*\);"/"\1 1;"/g \
+system/collapseDict.org > system/collapseDict
+
+runApplication collapseEdges -latestTime -collapseFaces
+
+
+# ----------------------------------------------------------------- end-of-file

tutorials/mesh/foamyHexMesh/blob/constant/polyMesh/blockMeshDict

@@ -0,0 +1,69 @@
+/*--------------------------------*- 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      blockMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+convertToMeters 1.0;
+
+xmin -1.3;
+xmax  0.65;
+ymin -1.1;
+ymax  0.8;
+zmin -1.4;
+zmax  0.55;
+
+vertices
+(
+    ($xmin $ymin $zmin)
+    ($xmax $ymin $zmin)
+    ($xmax $ymax $zmin)
+    ($xmin $ymax $zmin)
+    ($xmin $ymin $zmax)
+    ($xmax $ymin $zmax)
+    ($xmax $ymax $zmax)
+    ($xmin $ymax $zmax)
+
+);
+
+blocks
+(
+    hex (0 1 2  3 4 5 6 7) (11 11 9) simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+    walls
+    {
+        type wall;
+        faces
+        (
+            (3 7 6 2)
+            (0 4 7 3)
+            (2 6 5 1)
+            (1 5 4 0)
+            (0 3 2 1)
+            (4 5 6 7)
+        );
+    }
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/constant/polyMesh/boundary

@@ -0,0 +1,28 @@
+/*--------------------------------*- 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       polyBoundaryMesh;
+    location    "constant/polyMesh";
+    object      boundary;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+1
+(
+    walls
+    {
+        type            wall;
+        nFaces          638;
+        startFace       2948;
+    }
+)
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/collapseDict

@@ -0,0 +1,84 @@
+/*--------------------------------*- 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          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/blob/system/controlDict

@@ -0,0 +1,53 @@
+/*--------------------------------*- 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;
+
+    root            "";
+    case            "";
+    instance        "";
+    local           "";
+
+    class           dictionary;
+    object          controlDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         80;
+
+deltaT          1;
+
+writeControl    timeStep;
+
+writeInterval   80;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  12;
+
+writeCompression uncompressed;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable yes;
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/decomposeParDict

@@ -0,0 +1,47 @@
+/*--------------------------------*- 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      decomposeParDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains 2;
+
+method          scotch;
+//method          ptscotch;
+// method          hierarchical;
+
+simpleCoeffs
+{
+    n               ( 2 2 1 );
+    delta           0.001;
+}
+
+hierarchicalCoeffs
+{
+    n               ( 2 1 1 );
+    delta           0.001;
+    order           xyz;
+}
+
+manualCoeffs
+{
+    dataFile        "";
+}
+
+distributed     no;
+
+roots           ( );
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/foamyHexMeshDict

@@ -0,0 +1,122 @@
+/*--------------------------------*- 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
+{
+    blob.stl
+    {
+        name blob;
+        type triSurfaceMesh;
+    }
+
+    refinementBox
+    {
+        type searchableBox;
+        min (-0.2  -0.6 -0.2);
+        max ( 0.4   0.2  0.35);
+    }
+}
+
+
+backgroundMeshDecomposition
+{
+    minLevels 0;
+    sampleResolution 4;
+    spanScale 20;
+    maxCellWeightCoeff 20;
+}
+
+
+initialPoints
+{
+    initialPointsMethod         autoDensity;
+    // initialPointsMethod     pointFile;
+
+    autoDensityCoeffs
+    {
+        minLevels               0;
+        maxSizeRatio            5.0;
+        sampleResolution        5;
+        surfaceSampleResolution 5;
+    }
+
+    pointFileCoeffs
+    {
+        pointFile               "constant/internalDelaunayVertices";
+    }
+}
+
+
+surfaceConformation
+{
+    locationInMesh                      (0.1 0.1 0.2);
+
+    geometryToConformTo
+    {
+        blob
+        {
+            featureMethod       none;
+        }
+    }
+}
+
+
+motionControl
+{
+    defaultCellSize             0.1;
+
+    minimumCellSizeCoeff        0;
+
+    maxSmoothingIterations      100;
+
+    maxRefinementIterations     0;
+
+    shapeControlFunctions
+    {
+        blob
+        {
+            type                    searchableSurfaceControl;
+            priority                1;
+            mode                    bothSides;
+
+            surfaceCellSizeFunction uniformValue;
+            uniformValueCoeffs
+            {
+                surfaceCellSizeCoeff     1;
+            }
+
+            cellSizeFunction        uniform;
+            uniformCoeffs
+            {}
+        }
+    }
+
+    objOutput                   no;
+
+    timeChecks                  no;
+}
+
+
+meshQualityControls
+{
+    #include "meshQualityDict"
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/fvSchemes

@@ -0,0 +1,54 @@
+/*--------------------------------*- 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;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default         none;
+}
+
+gradSchemes
+{
+    default         none;
+}
+
+divSchemes
+{
+    default         none;
+}
+
+laplacianSchemes
+{
+    default         none;
+}
+
+interpolationSchemes
+{
+    default         none;
+}
+
+snGradSchemes
+{
+    default         none;
+}
+
+fluxRequired
+{
+    default         no;
+}
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/fvSolution

@@ -0,0 +1,22 @@
+/*--------------------------------*- 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
+{
+}
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/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              1e-20;
+
+//- 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/blob/system/snappyHexMeshDict

@@ -0,0 +1,310 @@
+/*--------------------------------*- 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      snappyHexMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Which of the steps to run
+castellatedMesh false;
+snap            false;
+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
+{
+//    motorBike.obj
+//    {
+//        type triSurfaceMesh;
+//        name motorBike;
+//    }
+//
+//    refinementBox
+//    {
+//        type searchableBox;
+//        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 "someLine.eMesh";
+        //    level 2;
+        //}
+    );
+
+
+
+    // 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
+    {
+//        motorBike
+//        {
+//            // Surface-wise min and max refinement level
+//            level (5 6);
+//
+//            // Optional specification of patch type (default is wall). No
+//            // constraint types (cyclic, symmetry) etc. are allowed.
+//            patchInfo
+//            {
+//                type wall;
+//                inGroups (motorBike);
+//            }
+//        }
+    }
+
+    // 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));
+//        }
+    }
+
+
+    // 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 (-1 0 0);
+
+
+    // 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 4.0;
+
+    //- Number of mesh displacement relaxation iterations.
+    nSolveIter 0;
+
+    //- Maximum number of snapping relaxation iterations. Should stop
+    //  before upon reaching a correct mesh.
+    nRelaxIter 5;
+
+    //- Highly experimental and wip: number of feature edge snapping
+    //  iterations. Leave out altogether to disable.
+    //  Do not use here since mesh resolution too low and baffles present
+    //nFeatureSnapIter 10;
+}
+
+
+
+// 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 false;
+
+    // Per final patch (so not geometry!) the layer information
+    layers
+    {
+        blob.stl_patch1
+        {
+            nSurfaceLayers 4;
+        }
+    }
+
+    // Expansion factor for layer mesh
+    expansionRatio 1.5;
+
+    // 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.
+    // is the thickness of the layer furthest away from the wall.
+    // See relativeSizes parameter.
+    finalLayerThickness 0.02;
+
+    // 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 0.005;
+
+    // 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 17x! (didn't do anything in 17x)
+    nGrow 0;
+
+    // Advanced settings
+
+    // When not to extrude surface. 0 is flat surface, 90 is when two faces
+    // are perpendicular
+    featureAngle 90;
+
+    // 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 1000;
+
+    // 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 17x! 90 degrees corresponds to 130 in 17x.
+    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;
+}
+
+
+
+// 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
+
+// Flags for optional output
+// 0 : only write final meshes
+// 1 : write intermediate meshes
+// 2 : write volScalarField with cellLevel for postprocessing
+// 4 : write current intersections as .obj files
+debug 0;
+
+
+// Merge tolerance. Is fraction of overall bounding box of initial mesh.
+// Note: the write tolerance needs to be higher than this.
+mergeTolerance 1e-6;
+
+
+// ************************************************************************* //

tutorials/mesh/foamyHexMesh/blob/system/topoSetDict

@@ -0,0 +1,149 @@
+/*--------------------------------*- 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 -0.2)(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    x;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (-0.32 -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;
+        }
+    }
+
+    // ~~~~~~~~~~~~~~~~ //
+
+    {
+        name    sp;
+        type    cellSet;
+        action  new;
+        source  sphereToCell;
+        sourceInfo
+        {
+            centre (-0.3 -0.3 -0.3);
+            radius 0.4;
+        }
+    }
+
+    {
+        name    spf;
+        type    faceSet;
+        action  new;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    sp;
+            option all;
+        }
+    }
+
+    {
+        name    sp;
+        type    cellSet;
+        action  invert;
+    }
+
+    {
+        name    spf;
+        type    faceSet;
+        action  subset;
+        source  cellToFace;
+        sourceInfo
+        {
+            set    sp;
+            option all;
+        }
+    }
+);
+
+// ************************************************************************* //