diff --git a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/files b/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/files
deleted file mode 100644
index 306679d16247a356313a99ad95cd2bca500ee0c0..0000000000000000000000000000000000000000
--- a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/files
+++ /dev/null
@@ -1,3 +0,0 @@
-wdot.C
-
-EXE = $(FOAM_APPBIN)/wdot
diff --git a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/options b/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/options
deleted file mode 100644
index 318e1be8f4db9fb03aa149e620e74d560ddd241d..0000000000000000000000000000000000000000
--- a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/Make/options
+++ /dev/null
@@ -1,8 +0,0 @@
-EXE_INC = \
- -I$(LIB_SRC)/finiteVolume/lnInclude \
- -I$(LIB_SRC)/meshTools/lnInclude
-
-EXE_LIBS = \
- -lgenericPatchFields \
- -lfiniteVolume \
- -lmeshTools
diff --git a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/wdot.C b/applications/utilities/postProcessing/toBeFunctionObjects/wdot/wdot.C
deleted file mode 100644
index 36dc327ac8fc46bfa957a34f388cc6d63be33851..0000000000000000000000000000000000000000
--- a/applications/utilities/postProcessing/toBeFunctionObjects/wdot/wdot.C
+++ /dev/null
@@ -1,123 +0,0 @@
-/*---------------------------------------------------------------------------*\
- ========= |
- \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
- \\ / O peration |
- \\ / A nd | Copyright (C) 2011-2016 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/>.
-
-Application
- wdot
-
-Description
- Calculates and writes wdot for each time.
-
-\*---------------------------------------------------------------------------*/
-
-#include "fvCFD.H"
-
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-int main(int argc, char *argv[])
-{
- timeSelector::addOptions();
-
- #include "setRootCase.H"
- #include "createTime.H"
-
- instantList timeDirs = timeSelector::select0(runTime, args);
-
- #include "createMesh.H"
-
- forAll(timeDirs, timeI)
- {
- runTime.setTime(timeDirs[timeI], timeI);
-
- mesh.readUpdate();
-
- volScalarField mgb
- (
- IOobject
- (
- "mgb",
- runTime.timeName(),
- mesh,
- IOobject::MUST_READ
- ),
- mesh
- );
-
- volScalarField Su
- (
- IOobject
- (
- "Su",
- runTime.timeName(),
- mesh,
- IOobject::MUST_READ
- ),
- mesh
- );
-
- volScalarField Xi
- (
- IOobject
- (
- "Xi",
- runTime.timeName(),
- mesh,
- IOobject::MUST_READ
- ),
- mesh
- );
-
- volScalarField St
- (
- IOobject
- (
- "St",
- runTime.timeName(),
- mesh,
- IOobject::NO_READ
- ),
- Xi*Su
- );
-
- St.write();
-
- volScalarField wdot
- (
- IOobject
- (
- "wdot",
- runTime.timeName(),
- mesh,
- IOobject::NO_READ
- ),
- St*mgb
- );
-
- wdot.write();
- }
-
- return 0;
-}
-
-
-// ************************************************************************* //
diff --git a/etc/caseDicts/postProcessing/fields/XiReactionRate b/etc/caseDicts/postProcessing/fields/XiReactionRate
new file mode 100644
index 0000000000000000000000000000000000000000..7013a0d9e06a25c3d68049a8bf401654fe1d560e
--- /dev/null
+++ b/etc/caseDicts/postProcessing/fields/XiReactionRate
@@ -0,0 +1,22 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Web: www.OpenFOAM.org
+ \\/ M anipulation |
+-------------------------------------------------------------------------------
+Description
+ Writes the turbulent flame-speed and reaction-rate volScalarFields for the
+ Xi-based combustion models.
+
+\*---------------------------------------------------------------------------*/
+
+type XiReactionRate;
+libs ("libfieldFunctionObjects.so");
+
+fields (b Xi Su);
+
+executeControl writeTime;
+writeControl writeTime;
+
+// ************************************************************************* //
diff --git a/src/functionObjects/field/Make/files b/src/functionObjects/field/Make/files
index 6c1cca2dc8eda28668e90d4bcb05246db747a2af..d0de311968712951a549324213df5b35adcae3aa 100644
--- a/src/functionObjects/field/Make/files
+++ b/src/functionObjects/field/Make/files
@@ -57,4 +57,6 @@ wallShearStress/wallShearStress.C
writeCellCentres/writeCellCentres.C
writeCellVolumes/writeCellVolumes.C
+XiReactionRate/XiReactionRate.C
+
LIB = $(FOAM_LIBBIN)/libfieldFunctionObjects
diff --git a/src/functionObjects/field/XiReactionRate/XiReactionRate.C b/src/functionObjects/field/XiReactionRate/XiReactionRate.C
new file mode 100644
index 0000000000000000000000000000000000000000..2f6febfb54580f63d69e3a22da4113c7f1af7208
--- /dev/null
+++ b/src/functionObjects/field/XiReactionRate/XiReactionRate.C
@@ -0,0 +1,119 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2016 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 "XiReactionRate.H"
+#include "volFields.H"
+#include "fvcGrad.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+ defineTypeNameAndDebug(XiReactionRate, 0);
+ addToRunTimeSelectionTable(functionObject, XiReactionRate, dictionary);
+}
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
+
+Foam::functionObjects::XiReactionRate::XiReactionRate
+(
+ const word& name,
+ const Time& runTime,
+ const dictionary& dict
+)
+:
+ fvMeshFunctionObject(name, runTime, dict)
+{
+ read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
+
+Foam::functionObjects::XiReactionRate::~XiReactionRate()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
+
+bool Foam::functionObjects::XiReactionRate::execute()
+{
+ return true;
+}
+
+
+bool Foam::functionObjects::XiReactionRate::write()
+{
+ const volScalarField& b =
+ mesh_.lookupObject<volScalarField>("b");
+
+ const volScalarField& Su =
+ mesh_.lookupObject<volScalarField>("Su");
+
+ const volScalarField& Xi =
+ mesh_.lookupObject<volScalarField>("Xi");
+
+ volScalarField St
+ (
+ IOobject
+ (
+ "St",
+ time_.timeName(),
+ mesh_
+ ),
+ Xi*Su
+ );
+
+ Log << " Writing turbulent flame-speed field " << St.name()
+ << " to " << time_.timeName() << endl;
+
+ St.write();
+
+ volScalarField wdot
+ (
+ IOobject
+ (
+ "wdot",
+ time_.timeName(),
+ mesh_
+ ),
+ St*mag(fvc::grad(b))
+ );
+
+ Log << " Writing reaction-rate field " << wdot.name()
+ << " to " << time_.timeName() << endl;
+
+ wdot.write();
+
+ return true;
+}
+
+
+// ************************************************************************* //
diff --git a/src/functionObjects/field/XiReactionRate/XiReactionRate.H b/src/functionObjects/field/XiReactionRate/XiReactionRate.H
new file mode 100644
index 0000000000000000000000000000000000000000..467aa0c2235a312497dd096ee9dcb9ed97fb8704
--- /dev/null
+++ b/src/functionObjects/field/XiReactionRate/XiReactionRate.H
@@ -0,0 +1,127 @@
+/*---------------------------------------------------------------------------*\
+ ========= |
+ \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
+ \\ / O peration |
+ \\ / A nd | Copyright (C) 2016 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::functionObjects::XiReactionRate
+
+Group
+ grpFieldFunctionObjects
+
+Description
+ This function object writes the turbulent flame-speed and reaction-rate
+ volScalarFields for the Xi-based combustion models.
+
+ Example of function object specification:
+ \verbatim
+ XiReactionRate
+ {
+ type XiReactionRate;
+ libs ("libfieldFunctionObjects.so");
+ ...
+ }
+ \endverbatim
+
+Usage
+ \table
+ Property | Description | Required | Default value
+ type | type name: XiReactionRate | yes |
+ \endtable
+
+See also
+ Foam::functionObjects::fvMeshFunctionObject
+
+SourceFiles
+ XiReactionRate.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef functionObjects_XiReactionRate_H
+#define functionObjects_XiReactionRate_H
+
+#include "fvMeshFunctionObject.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+
+/*---------------------------------------------------------------------------*\
+ Class XiReactionRate Declaration
+\*---------------------------------------------------------------------------*/
+
+class XiReactionRate
+:
+ public fvMeshFunctionObject
+{
+ // Private member functions
+
+ //- Disallow default bitwise copy construct
+ XiReactionRate(const XiReactionRate&);
+
+ //- Disallow default bitwise assignment
+ void operator=(const XiReactionRate&);
+
+
+public:
+
+ //- Runtime type information
+ TypeName("XiReactionRate");
+
+
+ // Constructors
+
+ //- Construct from Time and dictionary
+ XiReactionRate
+ (
+ const word& name,
+ const Time& runTime,
+ const dictionary& dict
+ );
+
+
+ //- Destructor
+ virtual ~XiReactionRate();
+
+
+ // Member Functions
+
+ //- Do nothing
+ virtual bool execute();
+
+ //- Write the cell-centre fields
+ virtual bool write();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace functionObjects
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //