diff --git a/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun b/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun
index 56733c0c87766dbe869af880938264f7467d15ee..3953f6c668caeb66b296d8e2e32dff470b6ae07f 100755
--- a/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun
+++ b/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun
@@ -30,7 +30,7 @@ runApplication setFields
runApplication decomposePar -force
# Run
-runParallel $application 6
+runParallel $application 8
# Reconstruct
runApplication reconstructPar -noFunctionObjects
diff --git a/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun-pre b/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun-pre
index c9d916d4d1e144ace29b1e6f81ddfa44381e9aef..d65d576cf6fcd440146c7b7810b80cde342e5053 100755
--- a/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun-pre
+++ b/tutorials/mesh/foamyHexMesh/mixerVessel/Allrun-pre
@@ -80,6 +80,7 @@ done
# Meshing
\cp system/controlDict.mesh system/controlDict
+\cp system/collapseDict.collapseFaces system/collapseDict
runApplication blockMesh -region backgroundMeshDecomposition
@@ -92,6 +93,7 @@ runParallel foamyHexMesh $nProcs
runParallel collapseEdges $nProcs -collapseFaces -latestTime
mv log.collapseEdges log.collapseFaces
+\cp system/collapseDict.indirectPatchFaces system/collapseDict
runParallel collapseEdges $nProcs -collapseFaceSet indirectPatchFaces -latestTime
mv log.collapseEdges log.collapseFaceSet
@@ -99,5 +101,8 @@ runParallel checkMesh $nProcs -allTopology -allGeometry -latestTime
runApplication reconstructParMesh -latestTime
+# Copy the mesh into polyMesh
+\cp -r 102/polyMesh constant
+
# ----------------------------------------------------------------- end-of-file
diff --git a/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.collapseFaces b/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.collapseFaces
new file mode 100644
index 0000000000000000000000000000000000000000..5977e0ee8b1ff5dccaee96e24dce73c60c5f34da
--- /dev/null
+++ b/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.collapseFaces
@@ -0,0 +1,85 @@
+/*--------------------------------*- 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;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// If on, after collapsing check the quality of the mesh. If bad faces are
+// generated then redo the collapsing with stricter filtering.
+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 0.35;
+
+ // 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 outer iterations is mesh quality checking is enabled
+ maximumIterations 10;
+
+ maximumSmoothingIterations 1;
+
+ maxPointErrorCount 3;
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.indirectPatchFaces b/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.indirectPatchFaces
new file mode 100644
index 0000000000000000000000000000000000000000..0389a33b5a44969e3f7255dcb2cadd31f865d7e9
--- /dev/null
+++ b/tutorials/mesh/foamyHexMesh/mixerVessel/system/collapseDict.indirectPatchFaces
@@ -0,0 +1,85 @@
+/*--------------------------------*- 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;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// If on, after collapsing check the quality of the mesh. If bad faces are
+// generated then redo the collapsing with stricter filtering.
+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 1;
+
+ // 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 outer iterations is mesh quality checking is enabled
+ maximumIterations 10;
+
+ maximumSmoothingIterations 1;
+
+ maxPointErrorCount 3;
+}
+
+
+// ************************************************************************* //