openfoam/tutorials/mesh/cvMesh/flange/system/cvMeshDict

/*--------------------------------*- 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          cvMeshDict;
}

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

// Any scalar with a name <name>Coeff specifies a value that will be implemented
// as a faction of the local target cell size

geometry
{
    flange.obj
    {
        type triSurfaceMesh;
    }
}


backgroundMeshDecomposition
{
    minLevels 1;
    sampleResolution 4;
    spanScale 5;
    maxCellWeightCoeff 10;
}


surfaceConformation
{
    locationInMesh (0 0 0);

    pointPairDistanceCoeff      0.1;

    mixedFeaturePointPPDistanceCoeff    5.0;

    featurePointExclusionDistanceCoeff  0.4;

    featureEdgeExclusionDistanceCoeff   0.2;

    surfaceSearchDistanceCoeff  2.5;

    maxSurfaceProtrusionCoeff   0.1;

    maxQuadAngle 125;

    surfaceConformationRebuildFrequency 10;

    conformationControls
    {
        initial
        {
            edgeSearchDistCoeff         2;
            surfacePtReplaceDistCoeff   0.5;
            surfacePtExclusionDistanceCoeff 0.5;
        }

        iteration
        {
            edgeSearchDistCoeff         1.5;
            surfacePtReplaceDistCoeff   0.7;
        }

        maxIterations 15;

        iterationToInitialHitRatioLimit 0.001;
    }

    coarseConformationControls
    {
        $conformationControls;
    }

    fineConformationControls
    {
        $conformationControls;
    }

    geometryToConformTo
    {
        flange.obj
        {
            featureMethod    extendedFeatureEdgeMesh;
            extendedFeatureEdgeMesh  "flange.extendedFeatureEdgeMesh";
        }
    }

    additionalFeatures
    {
    }
}


initialPoints
{
    minimumSurfaceDistanceCoeff 0.55;

    initialPointsMethod         autoDensity;
    // initialPointsMethod         pointFile;

    autoDensityCoeffs
    {
        minCellSizeLimit 0.001;
        minLevels 1;
        maxSizeRatio 3.0;
        sampleResolution 4;
        surfaceSampleResolution 5;
    }

    pointFileCoeffs
    {
        pointFile              "constant/internalDelaunayVertices";
    }
}


motionControl
{
    defaultCellSize     0.001;

    // Assign a priority to all requests for cell sizes, the highest overrules.
    defaultPriority     0;

    cellSizeControlGeometry
    {
        flange.obj
        {
            priority            1;
            mode                bothSides;
            cellSizeFunction    linearDistance;
            linearDistanceCoeffs
            {
                surfaceCellSize     0.0005;
                distanceCellSize    $defaultCellSize;
                distance            0.004;
            }
        }
    }

    relaxationModel     adaptiveLinear;

    adaptiveLinearCoeffs
    {
        relaxationStart 1.0;
        relaxationEnd   0.0;
    }

    objOutput                   no;

    timeChecks                  no;

    maxLoadUnbalance            0.05;

    alignmentSearchSpokes       24;

    alignmentAcceptanceAngle    48;

    sizeAndAlignmentRebuildFrequency 20;

    pointInsertionCriteria
    {
        cellCentreDistCoeff     1.75;
        faceAreaRatioCoeff      0.0025;
        acceptanceAngle         21.5;
    }

    pointRemovalCriteria
    {
        cellCentreDistCoeff  0.65;
    }

    faceAreaWeightModel piecewiseLinearRamp;

    piecewiseLinearRampCoeffs
    {
        lowerAreaFraction       0.5;
        upperAreaFraction       1.0;
    }
}


polyMeshFiltering
{
    writeTetDualMesh                        false;
    filterSizeCoeff                         0.2;
    mergeClosenessCoeff                     1e-9;
    continueFilteringOnBadInitialPolyMesh   true;
    filterErrorReductionCoeff               0.5;
    filterCountSkipThreshold                4;
    maxCollapseIterations                   25;
    maxConsecutiveEqualFaceSets             5;
    surfaceStepFaceAngle                    80;
    edgeCollapseGuardFraction               0.3;
    maxCollapseFaceToPointSideLengthCoeff   0.35;
}


meshQualityControls
{
    maxNonOrtho         65;
    maxBoundarySkewness 50;
    maxInternalSkewness 10;
    maxConcave          80;
    minTetQuality       1e-30;
    minVol              0;
    minArea             -1;
    minTwist            0.001;
    minDeterminant      0.001;
    minFaceWeight       0.02;
    minVolRatio         0.01;
    minTriangleTwist    -1;
}


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