diff --git a/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.C b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.C
new file mode 100644
index 0000000000..53e961de55
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.C
@@ -0,0 +1,217 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013-2015 OpenFOAM Foundation
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "DESModelRegions.H"
+#include "volFields.H"
+#include "DESModelBase.H"
+#include "turbulenceModel.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+defineTypeNameAndDebug(DESModelRegions, 0);
+}
+
+
+// * * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * //
+
+void Foam::DESModelRegions::writeFileHeader(Ostream& os) const
+{
+    writeHeader(os, "DES model region coverage (% volume)");
+
+    writeCommented(os, "Time");
+    writeTabbed(os, "LES");
+    writeTabbed(os, "RAS");
+    os << endl;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::DESModelRegions::DESModelRegions
+(
+    const word& name,
+    const objectRegistry& obr,
+    const dictionary& dict,
+    const bool loadFromFiles
+)
+:
+    functionObjectFile(obr, name, typeName, dict),
+    name_(name),
+    obr_(obr),
+    active_(true),
+    resultName_(name),
+    log_(true)
+{
+    // Check if the available mesh is an fvMesh, otherwise deactivate
+    if (!isA<fvMesh>(obr_))
+    {
+        active_ = false;
+        WarningIn
+        (
+            "DESModelRegions::DESModelRegions"
+            "("
+                "const word&, "
+                "const objectRegistry&, "
+                "const dictionary&, "
+                "const bool"
+            ")"
+        )   << "No fvMesh available, deactivating " << name_ << nl
+            << endl;
+    }
+
+    read(dict);
+
+    if (active_)
+    {
+        const fvMesh& mesh = refCast<const fvMesh>(obr_);
+
+        volScalarField* DESModelRegionsPtr
+        (
+            new volScalarField
+            (
+                IOobject
+                (
+                    resultName_,
+                    mesh.time().timeName(),
+                    mesh,
+                    IOobject::NO_READ,
+                    IOobject::NO_WRITE
+                ),
+                mesh,
+                dimensionedScalar("0", dimless, 0.0)
+            )
+        );
+
+        mesh.objectRegistry::store(DESModelRegionsPtr);
+
+        writeFileHeader(file());
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::DESModelRegions::~DESModelRegions()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::DESModelRegions::read(const dictionary& dict)
+{
+    if (active_)
+    {
+        functionObjectFile::read(dict);
+
+        log_.readIfPresent("log", dict);
+        dict.readIfPresent("resultName", resultName_);
+    }
+}
+
+
+void Foam::DESModelRegions::execute()
+{
+    if (active_)
+    {
+        const fvMesh& mesh = refCast<const fvMesh>(obr_);
+
+        if (log_) Info<< type() << " " << name_ <<  " output:" << nl;
+
+        volScalarField& DESModelRegions =
+            const_cast<volScalarField&>
+            (
+                mesh.lookupObject<volScalarField>(resultName_)
+            );
+
+
+        if (mesh.foundObject<DESModelBase>(turbulenceModel::propertiesName))
+        {
+            const DESModelBase& model =
+                mesh.lookupObject<DESModelBase>
+                (
+                    turbulenceModel::propertiesName
+                );
+
+            DESModelRegions == model.LESRegion();
+
+            scalar prc =
+                gSum(DESModelRegions.internalField()*mesh.V())
+               /gSum(mesh.V())*100.0;
+
+            file() << obr_.time().value()
+                << token::TAB << prc
+                << token::TAB << 100.0 - prc
+                << endl;
+
+            if (log_) Info
+                << "    LES = " << prc << " % (volume)" << nl
+                << "    RAS = " << 100.0 - prc << " % (volume)" << nl
+                << endl;
+        }
+        else
+        {
+            if (log_) Info
+                << "    No DES turbulence model found in database" << nl
+                << endl;
+        }
+    }
+}
+
+
+void Foam::DESModelRegions::end()
+{
+    if (active_)
+    {
+        execute();
+    }
+}
+
+
+void Foam::DESModelRegions::timeSet()
+{
+    // Do nothing
+}
+
+
+void Foam::DESModelRegions::write()
+{
+    if (active_)
+    {
+        const volScalarField& DESModelRegions =
+            obr_.lookupObject<volScalarField>(resultName_);
+
+        if (log_) Info
+            << type() << " " << name_ <<  " output:" << nl
+            << "    writing field " << DESModelRegions.name() << nl
+            << endl;
+
+        DESModelRegions.write();
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.H b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.H
new file mode 100644
index 0000000000..2db27d53f2
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegions.H
@@ -0,0 +1,186 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013-2015 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 <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::DESModelRegions
+
+Group
+    grpUtilitiesFunctionObjects
+
+Description
+    This function object writes out an indicator field for DES turbulence
+    calculations, that is:
+    - 0 for RAS regions
+    - 1 for LES regions
+
+    The field is stored on the mesh database so that it can be retrieved and
+    used for other applications.
+
+    Example of function object specification to generate DES indicator field:
+    \verbatim
+    DESModelRegions1
+    {
+        type        DESModelRegions;
+        functionObjectLibs ("libutilityFunctionObjects.so");
+        ...
+    }
+    \endverbatim
+
+    \heading Function object usage
+    \table
+        Property     | Description             | Required    | Default value
+        type         | type name: DESModelRegions| yes       |
+        resultName   | Name of DES indicator field | no      | <function name>
+        log          | log to standard output  | no          | yes
+    \endtable
+
+SourceFiles
+    DESModelRegions.C
+    IODESModelRegions.H
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef DESModelRegions_H
+#define DESModelRegions_H
+
+#include "functionObjectFile.H"
+#include "volFieldsFwd.H"
+#include "Switch.H"
+#include "OFstream.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of classes
+class objectRegistry;
+class dictionary;
+class polyMesh;
+class mapPolyMesh;
+class fvMesh;
+
+/*---------------------------------------------------------------------------*\
+                       Class DESModelRegions Declaration
+\*---------------------------------------------------------------------------*/
+
+class DESModelRegions
+:
+    public functionObjectFile
+{
+protected:
+
+    // Protected data
+
+        //- Name of this set of DESModelRegions object
+        word name_;
+
+        const objectRegistry& obr_;
+
+        //- on/off switch
+        bool active_;
+
+        //- Result name
+        word resultName_;
+
+        //- Switch to send output to Info as well as to file
+        Switch log_;
+
+
+    // Protected Member Functions
+
+        //- File header information
+        virtual void writeFileHeader(Ostream& os) const;
+
+        //- Disallow default bitwise copy construct
+        DESModelRegions(const DESModelRegions&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const DESModelRegions&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("DESModelRegions");
+
+
+    // Constructors
+
+        //- Construct for given objectRegistry and dictionary.
+        //  Allow the possibility to load fields from files
+        DESModelRegions
+        (
+            const word& name,
+            const objectRegistry&,
+            const dictionary&,
+            const bool loadFromFiles = false
+        );
+
+
+    //- Destructor
+    virtual ~DESModelRegions();
+
+
+    // Member Functions
+
+        //- Return name of the set of DESModelRegions
+        virtual const word& name() const
+        {
+            return name_;
+        }
+
+        //- Read the DESModelRegions 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();
+
+        //- Called when time was set at the end of the Time::operator++
+        virtual void timeSet();
+
+        //- Calculate the DESModelRegions and write
+        virtual void write();
+
+        //- Update for changes of mesh
+        virtual void updateMesh(const mapPolyMesh&)
+        {}
+
+        //- Update for changes of mesh
+        virtual void movePoints(const polyMesh&)
+        {}
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.C b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.C
new file mode 100644
index 0000000000..2312e6f5fb
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.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 <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "DESModelRegionsFunctionObject.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineNamedTemplateTypeNameAndDebug(DESModelRegionsFunctionObject, 0);
+
+    addToRunTimeSelectionTable
+    (
+        functionObject,
+        DESModelRegionsFunctionObject,
+        dictionary
+    );
+}
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.H b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.H
new file mode 100644
index 0000000000..7e9a6ba45c
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/DESModelRegions/DESModelRegionsFunctionObject.H
@@ -0,0 +1,54 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  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 <http://www.gnu.org/licenses/>.
+
+Typedef
+    Foam::DESModelRegionsFunctionObject
+
+Description
+    FunctionObject wrapper around DESModelRegions to allow it to be created
+    via the functions entry within controlDict.
+
+SourceFiles
+    DESModelRegionsFunctionObject.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef DESModelRegionsFunctionObject_H
+#define DESModelRegionsFunctionObject_H
+
+#include "DESModelRegions.H"
+#include "OutputFilterFunctionObject.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef OutputFilterFunctionObject<DESModelRegions>
+        DESModelRegionsFunctionObject;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/DESModelRegions/IODESModelRegions.H b/src/postProcessing/functionObjects/utilities/DESModelRegions/IODESModelRegions.H
new file mode 100644
index 0000000000..17cc16b74e
--- /dev/null
+++ b/src/postProcessing/functionObjects/utilities/DESModelRegions/IODESModelRegions.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 <http://www.gnu.org/licenses/>.
+
+Typedef
+    Foam::IODESModelRegions
+
+Description
+    Instance of the generic IOOutputFilter for DESModelRegions.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef IODESModelRegions_H
+#define IODESModelRegions_H
+
+#include "DESModelRegions.H"
+#include "IOOutputFilter.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef IOOutputFilter<DESModelRegions> IODESModelRegions;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/postProcessing/functionObjects/utilities/Make/files b/src/postProcessing/functionObjects/utilities/Make/files
index 8e4eaaf81c..f42510d7a5 100644
--- a/src/postProcessing/functionObjects/utilities/Make/files
+++ b/src/postProcessing/functionObjects/utilities/Make/files
@@ -6,6 +6,9 @@ codedFunctionObject/codedFunctionObject.C
 CourantNo/CourantNo.C
 CourantNo/CourantNoFunctionObject.C
 
+DESModelRegions/DESModelRegions.C
+DESModelRegions/DESModelRegionsFunctionObject.C
+
 dsmcFields/dsmcFields.C
 dsmcFields/dsmcFieldsFunctionObject.C