diff --git a/src/functionObjects/field/Make/files b/src/functionObjects/field/Make/files
index ab1157350a..649176d1f4 100644
--- a/src/functionObjects/field/Make/files
+++ b/src/functionObjects/field/Make/files
@@ -74,6 +74,7 @@ CourantNo/CourantNo.C
 PecletNo/PecletNo.C
 blendingFactor/blendingFactor.C
 momentum/momentum.C
+momentumError/momentumError.C
 pressure/pressure.C
 MachNo/MachNo.C
 Curle/Curle.C
diff --git a/src/functionObjects/field/momentumError/momentumError.C b/src/functionObjects/field/momentumError/momentumError.C
new file mode 100644
index 0000000000..866a8fe18b
--- /dev/null
+++ b/src/functionObjects/field/momentumError/momentumError.C
@@ -0,0 +1,216 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 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 "momentumError.H"
+
+#include "fvcDiv.H"
+#include "fvcGrad.H"
+#include "fvcLaplacian.H"
+
+#include "turbulenceModel.H"
+#include "turbulentTransportModel.H"
+#include "turbulentFluidThermoModel.H"
+#include "addToRunTimeSelectionTable.H"
+
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+    defineTypeNameAndDebug(momentumError, 0);
+    addToRunTimeSelectionTable(functionObject, momentumError, dictionary);
+}
+}
+
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+Foam::tmp<Foam::volVectorField>
+Foam::functionObjects::momentumError::divDevRhoReff()
+{
+    typedef compressible::turbulenceModel cmpTurbModel;
+    typedef incompressible::turbulenceModel icoTurbModel;
+
+    {
+        auto* turb = findObject<cmpTurbModel>
+        (
+            turbulenceModel::propertiesName
+        );
+
+        if (turb)
+        {
+            return tmp<volVectorField>::New
+            (
+                "divDevRhoReff",
+              - fvc::div
+                (
+                    (turb->rho()*turb->nuEff())
+                   *dev2(T(fvc::grad(turb->U()))),
+                   "div(((rho*nuEff)*dev2(T(grad(U)))))"
+                )
+              - fvc::laplacian
+                (
+                    turb->rho()*turb->nuEff(),
+                    turb->U(),
+                    "laplacian(nuEff,U)"
+                )
+            );
+        }
+    }
+
+    {
+        const auto* turb = findObject<icoTurbModel>
+        (
+            turbulenceModel::propertiesName
+        );
+
+        if (turb)
+        {
+            return tmp<volVectorField>::New
+            (
+                "divDevReff",
+              - fvc::div
+                (
+                    (turb->nuEff())*dev2(T(fvc::grad(turb->U()))),
+                    "div((nuEff*dev2(T(grad(U)))))"
+                )
+              - fvc::laplacian
+                (
+                    turb->nuEff(), turb->U(), "laplacian(nuEff,U)"
+                )
+            );
+        }
+     }
+
+     return volVectorField::null();
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::functionObjects::momentumError::momentumError
+(
+    const word& name,
+    const Time& runTime,
+    const dictionary& dict
+)
+:
+    fvMeshFunctionObject(name, runTime, dict),
+    pName_("p"),
+    UName_("U"),
+    phiName_("phi")
+{
+    read(dict);
+
+    const surfaceScalarField& phi =
+        lookupObject<surfaceScalarField>(phiName_);
+
+    volVectorField* momentPtr
+    (
+        new volVectorField
+        (
+            IOobject
+            (
+                "momentError",
+                time_.timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh_,
+            dimensionedVector(phi.dimensions()*dimVelocity/dimVolume, Zero)
+        )
+    );
+
+    mesh_.objectRegistry::store(momentPtr);
+}
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::functionObjects::momentumError::read(const dictionary& dict)
+{
+    fvMeshFunctionObject::read(dict);
+
+    Info<< type() << " " << name() << ":" << nl;
+
+    // Optional field name entries
+    if (dict.readIfPresent<word>("p", pName_))
+    {
+        Info<< "    p: " << pName_ << endl;
+    }
+    if (dict.readIfPresent<word>("U", UName_))
+    {
+        Info<< "    U: " << UName_ << endl;
+    }
+
+    if (dict.readIfPresent<word>("phi", phiName_))
+    {
+        Info<< "    phi: " << phiName_ << endl;
+    }
+
+    return true;
+}
+
+
+void Foam::functionObjects::momentumError::calcMomentError()
+{
+
+    volVectorField& momentErr =
+        lookupObjectRef<volVectorField>("momentError");
+
+    const volScalarField& p = lookupObject<volScalarField>(pName_);
+    const volVectorField& U = lookupObject<volVectorField>(UName_);
+    const surfaceScalarField& phi =
+        lookupObject<surfaceScalarField>(phiName_);
+
+    momentErr = divDevRhoReff() + fvc::div(phi, U) + fvc::grad(p);
+
+}
+
+
+bool Foam::functionObjects::momentumError::execute()
+{
+    calcMomentError();
+
+    return true;
+}
+
+
+bool Foam::functionObjects::momentumError::write()
+{
+    const volVectorField& momentErr =
+        lookupObjectRef<volVectorField>("momentError");
+
+    momentErr.write();
+
+    return true;
+}
+
+// ************************************************************************* //
diff --git a/src/functionObjects/field/momentumError/momentumError.H b/src/functionObjects/field/momentumError/momentumError.H
new file mode 100644
index 0000000000..98c78dad7c
--- /dev/null
+++ b/src/functionObjects/field/momentumError/momentumError.H
@@ -0,0 +1,155 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 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/>.
+
+Class
+    Foam::functionObjects::momentumError
+
+Group
+    grpForcesFunctionObjects
+
+Description
+    Produces a balance terms result for the steady momentum equation
+
+Usage
+    Example of function object specification:
+    \verbatim
+    momErr
+    {
+        type        momentumError;
+    }
+    \endverbatim
+
+    Where the entries comprise:
+    \table
+        Property     | Description             | Required    | Default value
+        type         | Type name: momentumError| yes         |
+        p            | Pressure field name     | no          | p
+        U            | Velocity field name     | no          | U
+        phi          | Flux field name         | no          | phi
+    \endtable
+See also
+    Foam::functionObject
+    Foam::functionObjects::fvMeshFunctionObject
+
+SourceFiles
+    momentumError.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef functionObjects_momentumError_H
+#define functionObjects_momentumError_H
+
+#include "fvMeshFunctionObject.H"
+#include "volFieldsFwd.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class momentumError Declaration
+\*---------------------------------------------------------------------------*/
+
+class momentumError
+:
+    public fvMeshFunctionObject
+{
+
+protected:
+
+    // Protected data
+
+        // Read from dictionary
+
+            //- Name of pressure field
+            word pName_;
+
+            //- Name of velocity field
+            word UName_;
+
+            //- Flux
+            word phiName_;
+
+
+    // Protected Member Functions
+
+         //- Return the effective viscous stress (laminar + turbulent).
+        tmp<volVectorField> divDevRhoReff();
+
+        //- No copy construct
+        momentumError(const momentumError&) = delete;
+
+        //- No copy assignment
+        void operator=(const momentumError&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("momentumError");
+
+
+    // Constructors
+
+        //- Construct from Time and dictionary
+        momentumError
+        (
+            const word& name,
+            const Time& runTime,
+            const dictionary& dict
+        );
+
+    //- Destructor
+    virtual ~momentumError() = default;
+
+    // Member Functions
+
+        //- Read the forces data
+        virtual bool read(const dictionary&);
+
+        //- Execute
+        virtual bool execute();
+
+        //- Write
+        virtual bool write();
+
+        //- Calculate the momentum error
+        void calcMomentError();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace functionObjects
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/tutorials/incompressible/simpleFoam/airFoil2D/system/controlDict b/tutorials/incompressible/simpleFoam/airFoil2D/system/controlDict
index 5b0620215c..7074601dbd 100644
--- a/tutorials/incompressible/simpleFoam/airFoil2D/system/controlDict
+++ b/tutorials/incompressible/simpleFoam/airFoil2D/system/controlDict
@@ -45,5 +45,26 @@ timePrecision   6;
 
 runTimeModifiable true;
 
+functions
+{
+    momErr
+    {
+        type        momentumError;
+        executeControl  writeTime;
+        writeControl    writeTime;
+        libs        (libfieldFunctionObjects);
+    }
+    
+    contErr
+    {
+        libs        (libfieldFunctionObjects);
+        type        div;
+        field       phi;
+        executeControl  writeTime;
+        writeControl    writeTime;
+    }
+    
+}
+
 
 // ************************************************************************* //