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OpenFOAM-6/applications/utilities/surface/surfaceFeatures/surfaceFeaturesDict
Henry Weller aaed6290d0 surfaceFeatures: New version of surfaceFeatureExtract with simplied controls
Surfaces are specified as a list and the controls applied to each, e.g. in the
rhoPimpleFoam/RAS/annularThermalMixer tutorial:

    surfaces
    (
        "AMI.obj"
        "shaft.obj"
        "wall.obj"
        "statorBlades.obj"
        "rotorBlades.obj"
    );

    includedAngle   150;  // Identifes a feature when angle
                      // between faces < includedAngle
    trimFeatures
    {
        minElem         10;   // minimum edges within a feature
    }

    writeObj        yes;  // writes out _edgeMesh.obj files to view features

If different controls are required for different surfaces multiple
sub-dictionaries can be used:

    AMIsurfaces
    {
        surfaces
        (
            "AMI.obj"
        );

        includedAngle   140;  // Identifes a feature when angle
                          // between faces < includedAngle
        trimFeatures
        {
            minElem         8;   // minimum edges within a feature
        }

        writeObj        yes;  // writes out _edgeMesh.obj files to view features
    }

    otherSurfaces
    {
        surfaces
        (
            "shaft.obj"
            "wall.obj"
            "statorBlades.obj"
            "rotorBlades.obj"
        );

        includedAngle   150;  // Identifes a feature when angle
                          // between faces < includedAngle
        trimFeatures
        {
            minElem         10;   // minimum edges within a feature
        }

        writeObj        yes;  // writes out _edgeMesh.obj files to view features
    }

Existing feature edge files corresponding to particular surfaces can be specified using
the "files" association list:

    surfaces
    (
        "AMI.obj"
        "shaft.obj"
        "wall.obj"
        "statorBlades.obj"
        "rotorBlades.obj"
    );

    files
    (
        "AMI.obj" "constant/triSurface/AMI.obj.eMesh";
    );

    includedAngle   150;  // Identifes a feature when angle
                      // between faces < includedAngle
    trimFeatures
    {
        minElem         10;   // minimum edges within a feature
    }

    writeObj        yes;  // writes out _edgeMesh.obj files to view features
2018-04-20 15:23:28 +01:00

119 lines
3.3 KiB
C++

/*--------------------------------*- 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 surfaceFeatureExtractDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
surface1
{
surfaces
(
"surface1.stl"
);
// Mark edges whose adjacent surface normals are at an angle less
// than includedAngle as features
// - 0 : selects no edges
// - 180: selects all edges
includedAngle 120;
// Do not mark region edges
geometricTestOnly yes;
// Write options
// Write features to obj format for postprocessing
writeObj yes;
verboseObj no;
}
surface2
{
surfaces
(
"surface2.nas"
);
// Load from an existing feature edge file
files
(
"surface2.nas" "constant/triSurface/featureEdges.nas";
);
trimFeatures
{
// Remove features with fewer than the specified number of edges
minElem 0;
// Remove features shorter than the specified cumulative length
minLen 0.0;
}
subsetFeatures
{
// Use a plane to select feature edges
// (normal)(basePoint)
// Keep only edges that intersect the plane will be included
plane (1 0 0)(0 0 0);
// Select feature edges using a box
// (minPt)(maxPt)
// Keep edges inside the box:
insideBox (0 0 0)(1 1 1);
// Keep edges outside the box:
outsideBox (0 0 0)(1 1 1);
// Keep nonManifold edges (edges with >2 connected faces where
// the faces form more than two different normal planes)
nonManifoldEdges yes;
// Keep open edges (edges with 1 connected face)
openEdges yes;
}
addFeatures
{
// Add (without merging) another extendedFeatureEdgeMesh
name axZ.extendedFeatureEdgeMesh;
// Optionally flip features (invert all normals, making
// convex<->concave etc)
//flip false;
}
// Output the curvature of the surface
curvature no;
// Output the proximity of feature points and edges to each other
featureProximity no;
// The maximum search distance to use when looking for other feature
// points and edges
maxFeatureProximity 1;
// Out put the closeness of surface elements to other surface elements.
closeness no;
// Write features to obj format for postprocessing
writeObj yes;
verboseObj no;
// Write surface proximity and curvature fields to vtk format
// for postprocessing
writeVTK no;
}
// ************************************************************************* //