createPatch: writing the cyclic match OBJ files is now optional

The new optional switch 'writeCyclicMatch' can be set to 'true' to enable the writing of
the cyclic match OBJ files; defaults to 'false'.

Patch contributed by Bruno Santos
Resolves patch request https://bugs.openfoam.org/view.php?id=2685

applications/utilities/mesh/manipulation/createPatch/createPatch.C

@@ -195,8 +195,8 @@ void filterPatches(polyMesh& mesh, const HashSet<word>& addedPatchNames)
 }
 
 
-// Dump for all patches the current match
+// Write current match for all patches the as OBJ files
-void dumpCyclicMatch(const fileName& prefix, const polyMesh& mesh)
+void writeCyclicMatchObjs(const fileName& prefix, const polyMesh& mesh)
 {
     const polyBoundaryMesh& patches = mesh.boundaryMesh();
 
@@ -211,10 +211,10 @@ void dumpCyclicMatch(const fileName& prefix, const polyMesh& mesh)
             const cyclicPolyPatch& cycPatch =
                 refCast<const cyclicPolyPatch>(patches[patchi]);
 
-            // Dump patches
+            // Write patches
             {
-                OFstream str(prefix+cycPatch.name()+".obj");
+                OFstream str(prefix+cycPatch.name() + ".obj");
-                Pout<< "Dumping " << cycPatch.name()
+                Pout<< "Writing " << cycPatch.name()
                     << " faces to " << str.name() << endl;
                 meshTools::writeOBJ
                 (
@@ -227,7 +227,7 @@ void dumpCyclicMatch(const fileName& prefix, const polyMesh& mesh)
             const cyclicPolyPatch& nbrPatch = cycPatch.neighbPatch();
             {
                 OFstream str(prefix+nbrPatch.name()+".obj");
-                Pout<< "Dumping " << nbrPatch.name()
+                Pout<< "Writing " << nbrPatch.name()
                     << " faces to " << str.name() << endl;
                 meshTools::writeOBJ
                 (
@@ -242,7 +242,7 @@ void dumpCyclicMatch(const fileName& prefix, const polyMesh& mesh)
             OFstream str(prefix+cycPatch.name()+nbrPatch.name()+"_match.obj");
             label vertI = 0;
 
-            Pout<< "Dumping cyclic match as lines between face centres to "
+            Pout<< "Writing cyclic match as lines between face centres to "
                 << str.name() << endl;
 
             forAll(cycPatch, facei)
@@ -532,6 +532,12 @@ int main(int argc, char *argv[])
     // Whether to synchronise points
     const Switch pointSync(dict.lookup("pointSync"));
 
+    // Whether to write cyclic matches to .OBJ files
+    const Switch writeCyclicMatch
+    (
+        dict.lookupOrDefault("writeCyclicMatch", false)
+    );
+
 
     const polyBoundaryMesh& patches = mesh.boundaryMesh();
 
@@ -539,7 +545,10 @@ int main(int argc, char *argv[])
     patches.checkParallelSync(true);
 
 
-    dumpCyclicMatch("initial_", mesh);
+    if (writeCyclicMatch)
+    {
+        writeCyclicMatchObjs("initial_", mesh);
+    }
 
     // Read patch construct info from dictionary
     PtrList<dictionary> patchSources(dict.lookup("patches"));
@@ -758,7 +767,10 @@ int main(int argc, char *argv[])
     autoPtr<mapPolyMesh> map = meshMod.changeMesh(mesh, true);
     mesh.movePoints(map().preMotionPoints());
 
-    dumpCyclicMatch("coupled_", mesh);
+    if (writeCyclicMatch)
+    {
+        writeCyclicMatchObjs("coupled_", mesh);
+    }
 
     // Synchronise points.
     if (!pointSync)
@@ -869,7 +881,10 @@ int main(int argc, char *argv[])
     filterPatches(mesh, addedPatchNames);
 
 
-    dumpCyclicMatch("final_", mesh);
+    if (writeCyclicMatch)
+    {
+        writeCyclicMatchObjs("final_", mesh);
+    }
 
 
     // Set the precision of the points data to 10

applications/utilities/mesh/manipulation/createPatch/createPatchDict

@@ -44,6 +44,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/combustion/fireFoam/LES/flameSpreadWaterSuppressionPanel/system/filmRegion/createPatchDict

@@ -12,9 +12,8 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-matchTolerance 1E-3;
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 pointSync false;
 

tutorials/combustion/fireFoam/LES/oppositeBurningPanels/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/combustion/fireFoam/LES/smallPoolFire2D/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/combustion/fireFoam/LES/smallPoolFire3D/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/incompressible/pimpleDyMFoam/propeller/system/createPatchDict

@@ -12,6 +12,7 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 // Do a synchronisation of coupled points after creation of any patches.
@@ -19,6 +20,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/incompressible/pimpleDyMFoam/wingMotion/wingMotion2D_simpleFoam/system/createPatchDict

@@ -14,6 +14,7 @@ FoamFile
 }
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
 pointSync false;
 
 patches

tutorials/incompressible/pimpleFoam/RAS/elipsekkLOmega/system/createPatchDict

@@ -12,6 +12,7 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 pointSync false;

tutorials/incompressible/pimpleFoam/laminar/planarCouette/0/U

@@ -0,0 +1,37 @@
+/*--------------------------------*- 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       volVectorField;
+    object      U;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -1 0 0 0 0];
+
+internalField   uniform (0 0 0);
+
+boundaryField
+{
+    movingWall
+    {
+        type            fixedValue;
+        value           uniform (1 0 0);
+    }
+
+    bottomWall
+    {
+        type            noSlip;
+    }
+
+    #includeEtc "caseDicts/setConstraintTypes"
+}
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/0/p

@@ -0,0 +1,36 @@
+/*--------------------------------*- 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       volScalarField;
+    object      p;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 2 -2 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    movingWall
+    {
+        type            zeroGradient;
+    }
+
+    bottomWall
+    {
+        type            zeroGradient;
+    }
+
+    #includeEtc "caseDicts/setConstraintTypes"
+}
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/0/sigma

@@ -0,0 +1,37 @@
+/*--------------------------------*- 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       volSymmTensorField;
+    object      R;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 2 -2 0 0 0 0];
+
+internalField   uniform (0 0 0 0 0 0);
+
+boundaryField
+{
+    movingWall
+    {
+        type            zeroGradient;
+    }
+
+    bottomWall
+    {
+        type            zeroGradient;
+    }
+
+    #includeEtc "caseDicts/setConstraintTypes"
+}
+
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/Allclean

@@ -0,0 +1,13 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+
+# Delete OBJ files that are created by createPatch,
+# when 'dumpCyclicMatches' set to true.
+rm -f $objFiles > /dev/null 2>&1
+
+#------------------------------------------------------------------------------

tutorials/incompressible/pimpleFoam/laminar/planarCouette/Allrun

@@ -0,0 +1,13 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+runApplication blockMesh
+
+runApplication createPatch -overwrite
+
+runApplication $(getApplication)
+
+#------------------------------------------------------------------------------

tutorials/incompressible/pimpleFoam/laminar/planarCouette/constant/transportProperties

@@ -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;
+    class       dictionary;
+    object      transportProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+transportModel  Newtonian;
+
+nu              [0 2 -1 0 0 0 0] 1.5e-05;
+
+BirdCarreauCoeffs
+{
+    nu0             [0 2 -1 0 0 0 0] 1e-03;
+    nuInf           [0 2 -1 0 0 0 0] 1e-05;
+    k               [0 0  1 0 0 0 0] 1;
+    n               [0 0  0 0 0 0 0] 0.5;
+}
+
+CrossPowerLawCoeffs
+{
+    nu0             [0 2 -1 0 0 0 0] 1e-03;
+    nuInf           [0 2 -1 0 0 0 0] 1e-05;
+    m               [0 0  1 0 0 0 0] 1;
+    n               [0 0  0 0 0 0 0] 0.5;
+}
+
+powerLawCoeffs
+{
+    nuMax           [0 2 -1 0 0 0 0] 1e-03;
+    nuMin           [0 2 -1 0 0 0 0] 1e-05;
+    k               [0 2 -1 0 0 0 0] 1e-05;
+    n               [0 0  0 0 0 0 0] 1;
+}
+
+HerschelBulkleyCoeffs
+{
+    nu0             [0 2 -1 0 0 0 0] 1e-03;
+    tau0            [0 2 -2 0 0 0 0] 1;
+    k               [0 2 -1 0 0 0 0] 1e-05;
+    n               [0 0  0 0 0 0 0] 1;
+}
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/constant/turbulenceProperties

@@ -0,0 +1,32 @@
+/*--------------------------------*- 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      turbulenceProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+simulationType laminar;
+
+laminar
+{
+    laminarModel        Maxwell;
+
+    MaxwellCoeffs
+    {
+        nuM             1;
+        lambda          5;
+    }
+
+    printCoeffs         on;
+}
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/system/blockMeshDict

@@ -0,0 +1,89 @@
+/*--------------------------------*- 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 0.1;
+
+vertices
+(
+    (0 0 0)
+    (1 0 0)
+    (1 1 0)
+    (0 1 0)
+    (0 0 0.1)
+    (1 0 0.1)
+    (1 1 0.1)
+    (0 1 0.1)
+);
+
+blocks
+(
+    hex (0 1 2 3 4 5 6 7) (20 20 1) simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+    movingWall
+    {
+        type wall;
+        faces
+        (
+            (3 7 6 2)
+        );
+    }
+    bottomWall
+    {
+        type wall;
+        faces
+        (
+            (1 5 4 0)
+        );
+    }
+    left
+    {
+        type wall;
+        faces
+        (
+            (0 4 7 3)
+        );
+    }
+    right
+    {
+        type wall;
+        faces
+        (
+            (2 6 5 1)
+        );
+    }
+    frontAndBack
+    {
+        type empty;
+        faces
+        (
+            (0 3 2 1)
+            (4 5 6 7)
+        );
+    }
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/system/controlDict

@@ -0,0 +1,49 @@
+/*--------------------------------*- 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      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     pimpleFoam;
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         25;
+
+deltaT          0.005;
+
+writeControl    runTime;
+
+writeInterval   0.5;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  6;
+
+writeCompression off;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable true;
+
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/system/createPatchDict

@@ -0,0 +1,96 @@
+/*--------------------------------*- 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      createPatchDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// This application/dictionary controls:
+// - optional: create new patches from boundary faces (either given as
+//   a set of patches or as a faceSet)
+// - always: order faces on coupled patches such that they are opposite. This
+//   is done for all coupled faces, not just for any patches created.
+// - optional: synchronise points on coupled patches.
+// - always: remove zero-sized (non-coupled) patches (that were not added)
+
+// 1. Create cyclic:
+// - specify where the faces should come from
+// - specify the type of cyclic. If a rotational specify the rotationAxis
+//   and centre to make matching easier
+// - always create both halves in one invocation with correct 'neighbourPatch'
+//   setting.
+// - optionally pointSync true to guarantee points to line up.
+
+// 2. Correct incorrect cyclic:
+// This will usually fail upon loading:
+//  "face 0 area does not match neighbour 2 by 0.0100005%"
+//  " -- possible face ordering problem."
+// - in polyMesh/boundary file:
+//      - loosen matchTolerance of all cyclics to get case to load
+//      - or change patch type from 'cyclic' to 'patch'
+//        and regenerate cyclic as above
+
+// Do a synchronisation of coupled points after creation of any patches.
+// Note: this does not work with points that are on multiple coupled patches
+//       with transformations (i.e. cyclics).
+pointSync true;
+
+// Optional: Write cyclic matches into .obj format; defaults to false.
+// writeCyclicMatch  false;
+
+// Patches to create.
+patches
+(
+    {
+        // Name of new patch
+        name cyc_half0;
+
+        // Dictionary to construct new patch from
+        patchInfo
+        {
+            type cyclic;
+            neighbourPatch cyc_half1;
+        }
+
+        // How to construct: either from 'patches' or 'set'
+        constructFrom patches;
+
+        // If constructFrom = patches : names of patches. Wildcards allowed.
+        patches (left);
+
+        // If constructFrom = set : name of faceSet
+        set f0;
+    }
+    {
+        // Name of new patch
+        name cyc_half1;
+
+        // Dictionary to construct new patch from
+        patchInfo
+        {
+            type cyclic;
+            neighbourPatch cyc_half0;
+        }
+
+        // How to construct: either from 'patches' or 'set'
+        constructFrom patches;
+
+        // If constructFrom = patches : names of patches. Wildcards allowed.
+        patches (right);
+
+        // If constructFrom = set : name of faceSet
+        set f0;
+    }
+);
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/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;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default         backward;
+}
+
+gradSchemes
+{
+    default         Gauss linear;
+}
+
+divSchemes
+{
+    default         none;
+
+    div(phi,U)      Gauss linearUpwind grad(U);
+    div(phi,sigma)  Gauss vanAlbada;
+
+    div(sigma)                  Gauss linear;
+    div((nu*dev2(T(grad(U)))))  Gauss linear;
+    div((nuM*grad(U)))          Gauss linear;
+}
+
+laplacianSchemes
+{
+    default         Gauss linear uncorrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         uncorrected;
+}
+
+// ************************************************************************* //

tutorials/incompressible/pimpleFoam/laminar/planarCouette/system/fvSolution

@@ -0,0 +1,67 @@
+/*--------------------------------*- 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      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    p
+    {
+        solver          GAMG;
+        smoother        DIC;
+        tolerance       1e-6;
+        relTol          0.05;
+    }
+
+    "(U|sigma)"
+    {
+        solver          smoothSolver;
+        smoother        symGaussSeidel;
+        tolerance       1e-6;
+        relTol          0.1;
+    }
+
+    pFinal
+    {
+        $p;
+        relTol          0;
+    }
+
+    "(U|sigma)Final"
+    {
+        $U;
+        relTol          0;
+    }
+}
+
+PIMPLE
+{
+    momentumPredictor   off;
+    nOuterCorrectors    15;
+    nCorrectors         3;
+    nNonOrthogonalCorrectors 0;
+    pRefCell            0;
+    pRefValue           0;
+    turbOnFinalIterOnly no;
+}
+
+relaxationFactors
+{
+    equations
+    {
+        ".*"   1;
+    }
+}
+
+// ************************************************************************* //

tutorials/lagrangian/reactingParcelFoam/cylinder/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patchInfo
 (

tutorials/lagrangian/reactingParcelFoam/rivuletPanel/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/lagrangian/reactingParcelFoam/rivuletPanel/system/wallFilmRegion/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/lagrangian/reactingParcelFoam/splashPanel/system/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/lagrangian/reactingParcelFoam/splashPanel/system/wallFilmRegion/createPatchDict

@@ -45,6 +45,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/mesh/foamyHexMesh/mixerVessel/system/createPatchDict

@@ -12,6 +12,7 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 // Do a synchronisation of coupled points after creation of any patches.
@@ -19,6 +20,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/multiphase/interPhaseChangeDyMFoam/propeller/system/createPatchDict

@@ -12,6 +12,7 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 // Do a synchronisation of coupled points after creation of any patches.
@@ -19,6 +20,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (

tutorials/multiphase/potentialFreeSurfaceDyMFoam/oscillatingBox/system/createPatchDict

@@ -12,6 +12,7 @@ FoamFile
     class       dictionary;
     object      createPatchDict;
 }
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 // Do a synchronisation of coupled points after creation of any patches.
@@ -19,6 +20,9 @@ FoamFile
 //       with transformations (i.e. cyclics).
 pointSync false;
 
+// Optional: Write cyclic matches into .obj format; defaults to false.
+writeCyclicMatch  false;
+
 // Patches to create.
 patches
 (