diff --git a/src/postProcessing/functionObjects/utilities/Make/files b/src/postProcessing/functionObjects/utilities/Make/files
index 4f132af3fa..01b4d0c4c9 100644
--- a/src/postProcessing/functionObjects/utilities/Make/files
+++ b/src/postProcessing/functionObjects/utilities/Make/files
@@ -9,6 +9,9 @@ Lambda2/Lambda2FunctionObject.C
Peclet/Peclet.C
Peclet/PecletFunctionObject.C
+Q/Q.C
+Q/QFunctionObject.C
+
DESModelRegions/DESModelRegions.C
DESModelRegions/DESModelRegionsFunctionObject.C
diff --git a/src/postProcessing/functionObjects/utilities/Q/IOQ.H b/src/postProcessing/functionObjects/utilities/Q/IOQ.H
new file mode 100644
index 0000000000..f4739a0876
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/Q/IOQ.H
@@ -0,0 +1,49 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2012 OpenFOAM Foundation
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+License
+ This file is part of OpenFOAM.
+
+ OpenFOAM is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with OpenFOAM. If not, see .
+
+Typedef
+ Foam::IOQ
+
+Description
+ Instance of the generic IOOutputFilter for Q.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef IOQ_H
+#define IOQ_H
+
+#include "Q.H"
+#include "IOOutputFilter.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+ typedef IOOutputFilter IOQ;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/Q/Q.C b/src/postProcessing/functionObjects/utilities/Q/Q.C
new file mode 100644
index 0000000000..3cfb670b6b
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/Q/Q.C
@@ -0,0 +1,154 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2012 OpenFOAM Foundation
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+License
+ This file is part of OpenFOAM.
+
+ OpenFOAM is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with OpenFOAM. If not, see .
+
+\*---------------------------------------------------------------------------*/
+
+#include "Q.H"
+#include "volFields.H"
+#include "dictionary.H"
+#include "fvcGrad.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(Foam::Q, 0);
+
+
+// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
+
+Foam::Q::Q
+(
+ const word& name,
+ const objectRegistry& obr,
+ const dictionary& dict,
+ const bool loadFromFiles
+)
+:
+ name_(name),
+ obr_(obr),
+ active_(true),
+ UName_("U")
+{
+ // Check if the available mesh is an fvMesh, otherwise deactivate
+ if (!isA(obr_))
+ {
+ active_ = false;
+ WarningIn
+ (
+ "Q::Q"
+ "("
+ "const word&, "
+ "const objectRegistry&, "
+ "const dictionary&, "
+ "const bool"
+ ")"
+ ) << "No fvMesh available, deactivating." << nl
+ << endl;
+ }
+
+ read(dict);
+
+ if (active_)
+ {
+ const fvMesh& mesh = refCast(obr_);
+
+ volScalarField* QPtr
+ (
+ new volScalarField
+ (
+ IOobject
+ (
+ type(),
+ mesh.time().timeName(),
+ mesh,
+ IOobject::NO_READ,
+ IOobject::NO_WRITE
+ ),
+ mesh,
+ dimensionedScalar("0", dimless, 0.0)
+ )
+ );
+
+ mesh.objectRegistry::store(QPtr);
+ }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
+
+Foam::Q::~Q()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
+
+void Foam::Q::read(const dictionary& dict)
+{
+ if (active_)
+ {
+ UName_ = dict.lookupOrDefault("UName", "U");
+ }
+}
+
+
+void Foam::Q::execute()
+{
+ // Do nothing - only valid on write
+}
+
+
+void Foam::Q::end()
+{
+ // Do nothing - only valid on write
+}
+
+
+void Foam::Q::write()
+{
+ if (active_)
+ {
+ const fvMesh& mesh = refCast(obr_);
+
+ const volVectorField& U =
+ mesh.lookupObject(UName_);
+
+ const volTensorField gradU(fvc::grad(U));
+
+ volScalarField& Q =
+ const_cast
+ (
+ mesh.lookupObject(type())
+ );
+
+ Q = 0.5*(sqr(tr(gradU)) - tr(((gradU) & (gradU))));
+
+ Q.correctBoundaryConditions();
+
+ Q.write();
+
+ Info<< type() << " output:" << nl
+ << " writing " << Q.name() << " field" << nl << endl;
+ }
+}
+
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/Q/Q.H b/src/postProcessing/functionObjects/utilities/Q/Q.H
new file mode 100644
index 0000000000..c42099dac7
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/Q/Q.H
@@ -0,0 +1,154 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2012 OpenFOAM Foundation
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+License
+ This file is part of OpenFOAM.
+
+ OpenFOAM is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with OpenFOAM. If not, see .
+
+Class
+ Foam::Q
+
+Group
+ grpUtilitiesFunctionObjects
+
+Description
+ This function object calculates and outputs the second invariant of the
+ velocity gradient tensor [1/s^2].
+
+ \f[
+ Q = 0.5(sqr(tr(\nabla U)) - tr(((\nabla U) \cdot (\nabla U))))
+ \f]
+
+SourceFiles
+ Q.C
+ IOQ.H
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef Q_H
+#define Q_H
+
+#include "volFieldsFwd.H"
+#include "surfaceFieldsFwd.H"
+#include "pointFieldFwd.H"
+#include "OFstream.H"
+#include "Switch.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of classes
+class objectRegistry;
+class dictionary;
+class mapPolyMesh;
+
+/*---------------------------------------------------------------------------*\
+ Class Q Declaration
+\*---------------------------------------------------------------------------*/
+
+class Q
+{
+ // Private data
+
+ //- Name of this set of Q objects
+ word name_;
+
+ //- Reference to the database
+ const objectRegistry& obr_;
+
+ //- On/off switch
+ bool active_;
+
+ //- Name of velocity field, default is "U"
+ word UName_;
+
+
+ // Private Member Functions
+
+ //- Disallow default bitwise copy construct
+ Q(const Q&);
+
+ //- Disallow default bitwise assignment
+ void operator=(const Q&);
+
+
+public:
+
+ //- Runtime type information
+ TypeName("Q");
+
+
+ // Constructors
+
+ //- Construct for given objectRegistry and dictionary.
+ // Allow the possibility to load fields from files
+ Q
+ (
+ const word& name,
+ const objectRegistry&,
+ const dictionary&,
+ const bool loadFromFiles = false
+ );
+
+
+ //- Destructor
+ virtual ~Q();
+
+
+ // Member Functions
+
+ //- Return name of the set of Q
+ virtual const word& name() const
+ {
+ return name_;
+ }
+
+ //- Read the Q data
+ virtual void read(const dictionary&);
+
+ //- Execute, currently does nothing
+ virtual void execute();
+
+ //- Execute at the final time-loop, currently does nothing
+ virtual void end();
+
+ //- Calculate the Q and write
+ virtual void write();
+
+ //- Update for changes of mesh
+ virtual void updateMesh(const mapPolyMesh&)
+ {}
+
+ //- Update for changes of mesh
+ virtual void movePoints(const pointField&)
+ {}
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.C b/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.C
new file mode 100644
index 0000000000..0fa525f0b6
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.C
@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2012 OpenFOAM Foundation
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+License
+ This file is part of OpenFOAM.
+
+ OpenFOAM is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with OpenFOAM. If not, see .
+
+\*---------------------------------------------------------------------------*/
+
+#include "QFunctionObject.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+ defineNamedTemplateTypeNameAndDebug(QFunctionObject, 0);
+
+ addToRunTimeSelectionTable
+ (
+ functionObject,
+ QFunctionObject,
+ dictionary
+ );
+}
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.H b/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.H
new file mode 100644
index 0000000000..4c96aac505
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/Q/QFunctionObject.H
@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2012 OpenFOAM Foundation
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+License
+ This file is part of OpenFOAM.
+
+ OpenFOAM is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with OpenFOAM. If not, see .
+
+Typedef
+ Foam::QFunctionObject
+
+Description
+ FunctionObject wrapper around Q to allow it to be created
+ via the functions entry within controlDict.
+
+SourceFiles
+ QFunctionObject.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef QFunctionObject_H
+#define QFunctionObject_H
+
+#include "Q.H"
+#include "OutputFilterFunctionObject.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+ typedef OutputFilterFunctionObject QFunctionObject;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //