motionSmootherAlgoCheck::checkMesh: improved minVol test and removed unused tests

motionSmootherAlgoCheck::checkMesh is used by snappyHexMesh to check the mesh
after snapping and morphing.  The minVol test which checks for collapsed cells
is now relative to the cube of the minimum bounding box length so that it is
less dependent on the size of the geometry and less likely to need changing for
very small geometries.

The default value is set in
etc/caseDicts/mesh/generation/meshQualityDict
etc/caseDicts/mesh/generation/meshQualityDict.cfg

//- Minimum cell pyramid volume relative to min bounding box length^3
//  Set to a fraction of the smallest cell volume expected.
//  Set to very negative number (e.g. -1e30) to disable.
minVol 1e-10;

The unused minArea and minTriangleTwist tests have been removed

etc/caseDicts/annotated/foamyHexMeshDict

@@ -433,8 +433,8 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
     minVol -1e30;
 
@@ -449,9 +449,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality 1e-30;
 
-    //- Minimum absolute 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 0.02;
@@ -465,9 +462,6 @@ meshQualityControls
 
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
-
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
 }
 
 

etc/caseDicts/mesh/generation/meshQualityDict

@@ -25,10 +25,10 @@ maxInternalSkewness 4;
 //  Set to 180 to disable.
 maxConcave 80;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol 1e-13;
+minVol 1e-10;
 
 //- Minimum quality of the tet formed by the face-centre
 //  and variable base point minimum decomposition triangles and
@@ -39,9 +39,6 @@ minVol 1e-13;
 //      1 = regular tet
 minTetQuality 1e-15;
 
-//- 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 0.02;
@@ -61,20 +58,9 @@ minFaceWeight 0.05;
 //- Volume ratio of neighbouring cells (0 -> 1)
 minVolRatio 0.01;
 
-//- Per triangle normal compared to average normal. Like face twist
-//  but now per (face-centre decomposition) triangle. Must be >0 for Fluent
-//  compatibility
-minTriangleTwist -1;
-
 nSmoothScale   4;
 
 errorReduction 0.75;
 
-//- If >0 : preserve cells with all points on the surface if the
-//  resulting volume after snapping (by approximation) is larger than
-//  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.1;
-
 
 // ************************************************************************* //

etc/caseDicts/mesh/generation/meshQualityDict.cfg

@@ -14,19 +14,10 @@ maxInternalSkewness 4;
 
 maxConcave        80;
 
-// Minimum cell pyramid volume; case dependent
+minVol            1e-10;
-minVol            1e-13;
 
 minTetQuality    -1e30;
 
-// if >0 : preserve single cells with all points on the surface if the
-// resulting volume after snapping (by approximation) is larger than
-// minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.5;
-
-minArea          -1;
-
 minTwist          0.02;
 
 minDeterminant    0.001;
@@ -35,8 +26,6 @@ minFaceWeight     0.05;
 
 minVolRatio       0.01;
 
-minTriangleTwist -1;
-
 nSmoothScale      4;
 
 errorReduction    0.75;

src/dynamicMesh/motionSmoother/motionSmootherAlgoCheck.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2022 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -76,10 +76,6 @@ bool Foam::motionSmootherAlgo::checkMesh
     (
         dict.lookup<scalar>("maxConcave", true)
     );
-    const scalar minArea
-    (
-        dict.lookup<scalar>("minArea", true)
-    );
     const scalar maxIntSkew
     (
         dict.lookup<scalar>("maxInternalSkewness", true)
@@ -100,10 +96,6 @@ bool Foam::motionSmootherAlgo::checkMesh
     (
         dict.lookup<scalar>("minTwist", true)
     );
-    const scalar minTriangleTwist
-    (
-        dict.lookup<scalar>("minTriangleTwist", true)
-    );
     scalar minFaceFlatness = -1.0;
     dict.readIfPresent("minFaceFlatness", minFaceFlatness, true);
     const scalar minDet
@@ -141,10 +133,12 @@ bool Foam::motionSmootherAlgo::checkMesh
 
     if (minVol > -great)
     {
+        const scalar refVol = pow3(mesh.bounds().minDim());
+
         polyMeshCheck::checkFacePyramids
         (
             report,
-            minVol,
+            minVol*refVol,
             mesh,
             mesh.cellCentres(),
             mesh.points(),
@@ -209,28 +203,6 @@ bool Foam::motionSmootherAlgo::checkMesh
         nWrongFaces = nNewWrongFaces;
     }
 
-    if (minArea > -small)
-    {
-        polyMeshCheck::checkFaceArea
-        (
-            report,
-            minArea,
-            mesh,
-            mesh.faceAreas(),
-            checkFaces,
-            &wrongFaces
-        );
-
-        label nNewWrongFaces = returnReduce(wrongFaces.size(), sumOp<label>());
-
-        Info<< "    faces with area < "
-            << setw(5) << minArea
-            << " m^2                            : "
-            << nNewWrongFaces-nWrongFaces << endl;
-
-        nWrongFaces = nNewWrongFaces;
-    }
-
     if (maxIntSkew > 0 || maxBounSkew > 0)
     {
         polyMeshCheck::checkFaceSkewness
@@ -333,32 +305,6 @@ bool Foam::motionSmootherAlgo::checkMesh
         nWrongFaces = nNewWrongFaces;
     }
 
-    if (minTriangleTwist > -1)
-    {
-        // Pout<< "Checking triangle twist: dot product of consecutive triangle"
-        //    << " normals resulting from face-centre decomposition" << endl;
-        polyMeshCheck::checkTriangleTwist
-        (
-            report,
-            minTriangleTwist,
-            mesh,
-            mesh.faceAreas(),
-            mesh.faceCentres(),
-            mesh.points(),
-            checkFaces,
-            &wrongFaces
-        );
-
-        label nNewWrongFaces = returnReduce(wrongFaces.size(), sumOp<label>());
-
-        Info<< "    faces with triangle twist < "
-            << setw(5) << minTriangleTwist
-            << "                      : "
-            << nNewWrongFaces-nWrongFaces << endl;
-
-        nWrongFaces = nNewWrongFaces;
-    }
-
     if (minFaceFlatness > -small)
     {
         polyMeshCheck::checkFaceFlatness

tutorials/compressible/rhoPimpleFoam/RAS/annularThermalMixer/system/snappyHexMeshDict

@@ -249,12 +249,10 @@ meshQualityControls
     maxConcave 80;
     minVol 1e-13;
     minTetQuality -1;
-    minArea -1;
     minTwist 0.01;
     minDeterminant 0.001;
     minFaceWeight 0.05;
     minVolRatio 0.01;
-    minTriangleTwist -1;
     nSmoothScale 4;
     errorReduction 0.75;
     relaxed

tutorials/incompressible/pimpleFoam/RAS/propeller/system/snappyHexMeshDict

@@ -388,10 +388,10 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
 
     //- Minimum quality of the tet formed by the face-centre
     //  and variable base point minimum decomposition triangles and
@@ -403,9 +403,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality -1; // 1e-30;
 
-    //- 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 0.01;
@@ -420,14 +417,11 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-
     // Advanced
 
     //- Number of error distribution iterations
     nSmoothScale 4;
+
     //- Amount to scale back displacement at error points
     errorReduction 0.75;
 

tutorials/incompressible/pimpleFoam/RAS/wingMotion/wingMotion_snappyHexMesh/system/snappyHexMeshDict

@@ -265,10 +265,10 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
 
     //- Minimum quality of the tet formed by the face-centre
     //  and variable base point minimum decomposition triangles and
@@ -279,9 +279,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality 1e-30;
 
-    //- 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 0.05;
@@ -296,14 +293,11 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-
     // Advanced
 
     //- Number of error distribution iterations
     nSmoothScale 4;
+
     //- Amount to scale back displacement at error points
     errorReduction 0.75;
 }

tutorials/incompressible/pisoFoam/LES/motorBike/motorBike/system/snappyHexMeshDict

@@ -47,7 +47,6 @@ geometry
 // Settings for the castellatedMesh generation.
 castellatedMeshControls
 {
-
     // Refinement parameters
     // ~~~~~~~~~~~~~~~~~~~~~
 
@@ -277,14 +276,12 @@ meshQualityControls
     //- Minimum projected area v.s. actual area. Set to -1 to disable.
     minFlatness 0.5;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
-    minTetQuality 1e-30;
 
-    //- Minimum face area. Set to <0 to disable.
+    minTetQuality 1e-30;
-    minArea -1;
 
     //- Minimum face twist. Set to <-1 to disable. dot product of face normal
     //  and face centre triangles normal
@@ -300,10 +297,6 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-
     // Advanced
 
     //- Number of error distribution iterations

tutorials/incompressible/simpleFoam/turbineSiting/system/snappyHexMeshDict

@@ -324,10 +324,10 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
 
     //- Minimum quality of the tet formed by the face-centre
     //  and variable base point minimum decomposition triangles and
@@ -338,9 +338,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality 1e-30;
 
-    //- 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 0.05;
@@ -355,25 +352,14 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-    //- If >0 : preserve single cells with all points on the surface if the
-    //  resulting volume after snapping (by approximation) is larger than
-    //  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-    //  If <0 : delete always.
-    // minVolCollapseRatio 0.5;
-
-
     // Advanced
 
     //- Number of error distribution iterations
     nSmoothScale 4;
+
     //- Amount to scale back displacement at error points
     errorReduction 0.75;
 
-
-
     // Optional : some meshing phases allow usage of relaxed rules.
     // See e.g. addLayersControls::nRelaxedIter.
     relaxed

tutorials/mesh/foamyHexMesh/blob/system/meshQualityDict

@@ -35,13 +35,10 @@ maxConcave          80;
 //      1 = regular tet
 minTetQuality       1e-30;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol              1e-20;
+minVol 1e-10;
-
-//- 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
@@ -57,8 +54,5 @@ minFaceWeight       0.02;
 //- minVolRatio (0 -> 1)
 minVolRatio         0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist    -1;
-
 
 // ************************************************************************* //

tutorials/mesh/foamyHexMesh/flange/system/meshQualityDict

@@ -35,13 +35,10 @@ maxConcave          80;
 //      1 = regular tet
 minTetQuality       1e-30;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol              0;
+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
@@ -57,8 +54,5 @@ minFaceWeight       0.02;
 //- minVolRatio (0 -> 1)
 minVolRatio         0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist    -1;
-
 
 // ************************************************************************* //

tutorials/mesh/foamyHexMesh/simpleShapes/system/meshQualityDict

@@ -35,13 +35,10 @@ maxConcave          80;
 //      1 = regular tet
 minTetQuality       1e-30;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol              0;
+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
@@ -57,8 +54,5 @@ minFaceWeight       0.02;
 //- minVolRatio (0 -> 1)
 minVolRatio         0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist    -1;
-
 
 // ************************************************************************* //

tutorials/multiphase/interFoam/RAS/DTCHull/system/meshQualityDict

@@ -26,10 +26,10 @@ maxInternalSkewness 4;
 //  Set to 180 to disable.
 maxConcave 80;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol 1e-13;
+minVol 1e-10;
 
 //- Minimum quality of the tet formed by the face-centre
 //  and variable base point minimum decomposition triangles and
@@ -40,9 +40,6 @@ minVol 1e-13;
 //      1 = regular tet
 minTetQuality 1e-30;
 
-//- 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 0.05;
@@ -57,16 +54,6 @@ minFaceWeight 0.05;
 //- minVolRatio (0 -> 1)
 minVolRatio 0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist -1;
-
-//- If >0 : preserve single cells with all points on the surface if the
-//  resulting volume after snapping (by approximation) is larger than
-//  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.5;
-
-
 // Advanced
 
 //- Number of error distribution iterations

tutorials/multiphase/interFoam/RAS/DTCHullMoving/system/meshQualityDict

@@ -26,10 +26,10 @@ maxInternalSkewness 4;
 //  Set to 180 to disable.
 maxConcave 80;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol 1e-13;
+minVol 1e-10;
 
 //- Minimum quality of the tet formed by the face-centre
 //  and variable base point minimum decomposition triangles and
@@ -40,9 +40,6 @@ minVol 1e-13;
 //      1 = regular tet
 minTetQuality 1e-30;
 
-//- 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 0.05;
@@ -57,16 +54,6 @@ minFaceWeight 0.05;
 //- minVolRatio (0 -> 1)
 minVolRatio 0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist -1;
-
-//- If >0 : preserve single cells with all points on the surface if the
-//  resulting volume after snapping (by approximation) is larger than
-//  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.5;
-
-
 // Advanced
 
 //- Number of error distribution iterations
@@ -74,8 +61,6 @@ nSmoothScale 4;
 //- Amount to scale back displacement at error points
 errorReduction 0.75;
 
-
-
 // Optional : some meshing phases allow usage of relaxed rules.
 // See e.g. addLayersControls::nRelaxedIter.
 relaxed

tutorials/multiphase/interFoam/RAS/DTCHullWave/system/meshQualityDict

@@ -26,10 +26,10 @@ maxInternalSkewness 4;
 //  Set to 180 to disable.
 maxConcave 80;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol 1e-13;
+minVol 1e-10;
 
 //- Minimum quality of the tet formed by the face-centre
 //  and variable base point minimum decomposition triangles and
@@ -40,9 +40,6 @@ minVol 1e-13;
 //      1 = regular tet
 minTetQuality 1e-30;
 
-//- 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 0.05;
@@ -57,16 +54,6 @@ minFaceWeight 0.05;
 //- minVolRatio (0 -> 1)
 minVolRatio 0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist -1;
-
-//- If >0 : preserve single cells with all points on the surface if the
-//  resulting volume after snapping (by approximation) is larger than
-//  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.5;
-
-
 // Advanced
 
 //- Number of error distribution iterations

tutorials/multiphase/interFoam/RAS/mixerVesselAMI/system/snappyHexMeshDict

@@ -513,10 +513,10 @@ meshQualityControls
     // Set to 180 to disable.
     maxConcave 80;
 
-    // Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    // Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
-    // Set to very negative number (e.g. -1e30) to disable.
+    //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
 
     // Minimum quality of the tet formed by the face-centre
     // and variable base point minimum decomposition triangles and
@@ -528,9 +528,6 @@ meshQualityControls
     //     1 = regular tet
     minTetQuality -1e-30;
 
-    // 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 0.05;
@@ -545,19 +542,11 @@ meshQualityControls
     // minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-    //- If >0 : preserve single cells with all points on the surface if the
-    //  resulting volume after snapping (by approximation) is larger than
-    //  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-    //  If <0 : delete always.
-    // minVolCollapseRatio 0.5;
-
     // Advanced
 
     // Number of error distribution iterations
     nSmoothScale 4;
+
     // amount to scale back displacement at error points
     errorReduction 0.75;
 

tutorials/multiphase/interFoam/RAS/planingHullW3/system/meshQualityDict

@@ -26,10 +26,10 @@ maxInternalSkewness 4;
 //  Set to 180 to disable.
 maxConcave 80;
 
-//- Minimum pyramid volume. Is absolute volume of cell pyramid.
+//- Minimum cell pyramid volume relative to min bounding box length^3
-//  Set to a sensible fraction of the smallest cell volume expected.
+//  Set to a fraction of the smallest cell volume expected.
 //  Set to very negative number (e.g. -1e30) to disable.
-minVol 1e-13;
+minVol 1e-10;
 
 //- Minimum quality of the tet formed by the face-centre
 //  and variable base point minimum decomposition triangles and
@@ -40,9 +40,6 @@ minVol 1e-13;
 //      1 = regular tet
 minTetQuality 1e-30;
 
-//- 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 0.05;
@@ -57,25 +54,14 @@ minFaceWeight 0.05;
 //- minVolRatio (0 -> 1)
 minVolRatio 0.01;
 
-//must be >0 for Fluent compatibility
-minTriangleTwist -1;
-
-//- If >0 : preserve single cells with all points on the surface if the
-//  resulting volume after snapping (by approximation) is larger than
-//  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
-//  If <0 : delete always.
-//minVolCollapseRatio 0.5;
-
-
 // Advanced
 
 //- Number of error distribution iterations
 nSmoothScale 4;
+
 //- Amount to scale back displacement at error points
 errorReduction 0.75;
 
-
-
 // Optional : some meshing phases allow usage of relaxed rules.
 // See e.g. addLayersControls::nRelaxedIter.
 relaxed

tutorials/multiphase/interFoam/RAS/propeller/system/snappyHexMeshDict

@@ -388,10 +388,10 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
-    //  Set to a sensible fraction of the smallest cell volume expected.
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-13;
+    minVol 1e-10;
 
     //- Minimum quality of the tet formed by the face-centre
     //  and variable base point minimum decomposition triangles and
@@ -403,9 +403,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality -1; // 1e-30;
 
-    //- 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 0.01;
@@ -420,14 +417,11 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-
     // Advanced
 
     //- Number of error distribution iterations
     nSmoothScale 4;
+
     //- Amount to scale back displacement at error points
     errorReduction 0.75;
 

tutorials/multiphase/interFoam/RAS/weirOverflow/system/blockMeshDict

@@ -53,32 +53,56 @@ blocks
     hex (6 7 11 10 18 19 23 22) (60 24 1) simpleGrading (1 1 1)
 );
 
-patches
+defaultPatch
+{
+    type empty;
+}
+
+boundary
 (
-    patch inlet
+    inlet
-    (
+    {
-        (0 12 16 4)
+        type patch;
-        (4 16 20 8)
+        faces
-    )
+        (
-    patch outlet
+            (0 12 16 4)
-    (
+            (4 16 20 8)
-        (7 19 15 3)
+        );
-        (11 23 19 7)
+    }
-    )
+
-    wall lowerWall
+    outlet
-    (
+    {
-        (0 1 13 12)
+        type patch;
-        (1 5 17 13)
+        faces
-        (5 6 18 17)
+        (
-        (2 14 18 6)
+            (7 19 15 3)
-        (2 3 15 14)
+            (11 23 19 7)
-    )
+        );
-    patch atmosphere
+    }
-    (
+
-        (8 20 21 9)
+    lowerWall
-        (9 21 22 10)
+    {
-        (10 22 23 11)
+        type wall;
-    )
+        faces
+        (
+            (0 1 13 12)
+            (1 5 17 13)
+            (5 6 18 17)
+            (2 14 18 6)
+            (2 3 15 14)
+        );
+    }
+
+    atmosphere
+    {
+        type patch;
+        faces
+        (
+            (8 20 21 9)
+            (9 21 22 10)
+            (10 22 23 11)
+        );
+    }
 );
 
 

tutorials/multiphase/interFoam/laminar/cavitatingBullet/system/snappyHexMeshDict

@@ -289,9 +289,10 @@ meshQualityControls
     //  Set to 180 to disable.
     maxConcave 80;
 
-    //- Minimum pyramid volume. Is absolute volume of cell pyramid.
+    //- Minimum cell pyramid volume relative to min bounding box length^3
+    //  Set to a fraction of the smallest cell volume expected.
     //  Set to very negative number (e.g. -1e30) to disable.
-    minVol 1e-20;
+    minVol 1e-10;
 
     //- Minimum quality of the tet formed by the face-centre
     //  and variable base point minimum decomposition triangles and
@@ -302,9 +303,6 @@ meshQualityControls
     //      1 = regular tet
     minTetQuality 1e-30;
 
-    //- 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 0.02;
@@ -319,14 +317,11 @@ meshQualityControls
     //- minVolRatio (0 -> 1)
     minVolRatio 0.01;
 
-    // must be >0 for Fluent compatibility
-    minTriangleTwist -1;
-
-
     // Advanced
 
     //- Number of error distribution iterations
     nSmoothScale 4;
+
     //- Amount to scale back displacement at error points
     errorReduction 0.75;
 }