ENH: runTime calculation of (dp/dt)^2 - issue #224

- implemented using magSqr() instead of sqr().
  For scalar fields they are the same, but can be useful
  if this function object is extended for more field types.

src/postProcessing/functionObjects/utilities/Make/files

@@ -6,6 +6,9 @@ codedFunctionObject/codedFunctionObject.C
 CourantNo/CourantNo.C
 CourantNo/CourantNoFunctionObject.C
 
+ddt2/ddt2.C
+ddt2/ddt2FunctionObject.C
+
 DESModelRegions/DESModelRegions.C
 DESModelRegions/DESModelRegionsFunctionObject.C
 

src/postProcessing/functionObjects/utilities/Make/options

@@ -32,4 +32,4 @@ LIB_LIBS = \
     -lsampling \
     -lsurfMesh \
     -lchemistryModel \
-    -lreactionThermophysicalModels
+    -lreactionThermophysicalModels

src/postProcessing/functionObjects/utilities/ddt2/IOddt2.H

@@ -0,0 +1,49 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     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::IOddt2
+
+Description
+    Instance of the generic IOOutputFilter for ddt2.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef IOddt2_H
+#define IOddt2_H
+
+#include "ddt2.H"
+#include "IOOutputFilter.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef IOOutputFilter<ddt2> IOddt2;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/postProcessing/functionObjects/utilities/ddt2/ddt2.C

@@ -0,0 +1,235 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     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 "ddt2.H"
+
+#include "volFields.H"
+#include "dictionary.H"
+#include "FieldFunctions.H"
+#include "fvcDdt.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(ddt2, 0);
+}
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+
+template<class FieldType>
+bool Foam::ddt2::calculate
+(
+    const fvMesh& mesh,
+    bool& done
+)
+{
+    if (done)
+    {
+        return true; // already done - skip
+    }
+
+    done = mesh.foundObject<FieldType>(fieldName_);
+    if (!done)
+    {
+        return false;
+    }
+
+    const FieldType& input =
+        mesh.lookupObject<FieldType>(fieldName_);
+
+    if (!mesh.foundObject<volScalarField>(resultName_))
+    {
+        const dimensionSet dims
+        (
+            mag_
+          ? mag(input.dimensions()/dimTime)
+          : magSqr(input.dimensions()/dimTime)
+        );
+
+        mesh.objectRegistry::store
+        (
+            new volScalarField
+            (
+                IOobject
+                (
+                    resultName_,
+                    mesh.time().timeName(),
+                    mesh,
+                    IOobject::NO_READ,
+                    IOobject::NO_WRITE // OR IOobject::AUTO_WRITE
+                ),
+                mesh,
+                dimensionedScalar
+                (
+                    "zero",
+                    dims,
+                    Zero
+                ),
+                emptyPolyPatch::typeName
+            )
+        );
+    }
+
+    volScalarField& field = const_cast<volScalarField&>
+    (
+        mesh.lookupObject<volScalarField>(resultName_)
+    );
+
+    if (mag_)
+    {
+        field = mag(fvc::ddt(input));
+    }
+    else
+    {
+        field = magSqr(fvc::ddt(input));
+    }
+
+    return done;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::ddt2::ddt2
+(
+    const word& name,
+    const objectRegistry& obr,
+    const dictionary& dict,
+    const bool loadFromFiles
+)
+:
+    name_(name),
+    obr_(obr),
+    active_(true),
+    fieldName_("undefined-fieldName"),
+    resultName_(word::null),
+    log_(true),
+    mag_(dict.lookupOrDefault<Switch>("mag", false))
+{
+    // Check if the available mesh is an fvMesh, otherwise deactivate
+    if (!isA<fvMesh>(obr_))
+    {
+        active_ = false;
+        WarningInFunction
+            << "No fvMesh available, deactivating." << nl
+            << endl;
+    }
+
+    read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::ddt2::~ddt2()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::ddt2::read(const dictionary& dict)
+{
+    if (active_)
+    {
+        log_.readIfPresent("log", dict);
+
+        dict.lookup("fieldName") >> fieldName_;
+        dict.readIfPresent("resultName", resultName_);
+
+        if (resultName_.empty())
+        {
+            resultName_ =
+            (
+                word(mag_ ? "mag" : "magSqr")
+              + "(ddt(" + fieldName_ + "))"
+            );
+        }
+    }
+}
+
+
+void Foam::ddt2::execute()
+{
+    if (active_)
+    {
+        const fvMesh& mesh = refCast<const fvMesh>(obr_);
+        bool done = false;
+
+        calculate<volScalarField>(mesh, done);
+        calculate<volVectorField>(mesh, done);
+
+        if (!done)
+        {
+            WarningInFunction
+                << "Unprocessed field " << fieldName_ << endl;
+        }
+    }
+}
+
+
+void Foam::ddt2::end()
+{
+    // Do nothing
+}
+
+
+void Foam::ddt2::timeSet()
+{
+    // Do nothing
+}
+
+
+void Foam::ddt2::write()
+{
+    if (active_)
+    {
+        if (obr_.foundObject<regIOobject>(resultName_))
+        {
+            const regIOobject& io =
+                obr_.lookupObject<regIOobject>(resultName_);
+
+            if (log_)
+            {
+                const volScalarField& field = dynamicCast<const volScalarField&>
+                (
+                    io
+                );
+
+                // could add additional statistics here
+                Info<< type() << " " << name_
+                    << " output: writing field " << field.name()
+                    << " average: " << gAverage(field) << endl;
+            }
+
+            // could also add option to suppress writing?
+            io.write();
+        }
+    }
+}
+
+
+// ************************************************************************* //

src/postProcessing/functionObjects/utilities/ddt2/ddt2.H

@@ -0,0 +1,212 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     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::ddt2
+
+Group
+    grpFVFunctionObjects
+
+Description
+    This function object calculates the magnitude squared
+    of d(scalarField)/dt.
+
+    The result can be used further for determining variance or RMS values
+    (for example).
+
+    Example of function object specification:
+    \verbatim
+    dpdt2
+    {
+        type        ddt2;
+        functionObjectLibs ("libutilityFunctionObjects.so");
+        fieldName   p;
+        resultName  dpdt2;
+        ...
+    }
+    \endverbatim
+
+    \heading Function object usage
+    \table
+        Property | Description                | Required  | Default value
+        type     | type name: ddt2            | yes       |
+        fieldName | Name of field to process  | yes       |
+        resultName | Name of magnitude field  | no        | magSqr(ddt(fieldName))
+        log      | Log to standard output     | no        | yes
+        mag      | Use 'mag' instead of 'magSqr' | no     | false
+    \endtable
+
+    Note that the optional 'mag' entry cannot be changed during the simulation
+    since it alters the dimensions of the output field.
+
+SourceFiles
+    ddt2.C
+    IOddt2.H
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef ddt2_H
+#define ddt2_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 fvMesh;
+class polyMesh;
+class mapPolyMesh;
+class dimensionSet;
+
+/*---------------------------------------------------------------------------*\
+                            Class ddt2 Declaration
+\*---------------------------------------------------------------------------*/
+
+class ddt2
+{
+    // Private data
+
+        //- Name of this ddt2 object
+        word name_;
+
+        //- Reference to the database
+        const objectRegistry& obr_;
+
+        //- On/off switch
+        bool active_;
+
+        //- Name of field to process
+        word fieldName_;
+
+        //- Name of result field
+        word resultName_;
+
+        //- Switch to send output to Info as well as to file
+        Switch log_;
+
+        //- Use 'mag' instead of 'magSqr'.
+        //  Cannot be adjusted during the simulation since it alters the
+        //  dimensions of the output field.
+        const Switch mag_;
+
+
+    // Private Member Functions
+
+        //- Create result field upon demand
+        volScalarField& getOrCreateResultField
+        (
+            const fvMesh&,
+            const dimensionSet& inputDims
+        );
+
+
+        //- Create result field upon demand
+        template<class FieldType>
+        bool calculate(const FieldType& input);
+
+        //- Create result field upon demand
+        template<class FieldType>
+        bool calculate(const fvMesh&, bool& done);
+
+
+        //- Disallow default bitwise copy construct
+        ddt2(const ddt2&) = delete;
+
+        //- Disallow default bitwise assignment
+        void operator=(const ddt2&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("ddt2");
+
+
+    // Constructors
+
+        //- Construct for given objectRegistry and dictionary.
+        //  Allow the possibility to load fields from files
+        ddt2
+        (
+            const word& name,
+            const objectRegistry&,
+            const dictionary&,
+            const bool loadFromFiles = false
+        );
+
+
+    //- Destructor
+    virtual ~ddt2();
+
+
+    // Member Functions
+
+        //- Return name of the ddt2 function object
+        virtual const word& name() const
+        {
+            return name_;
+        }
+
+        //- Read the ddt2 specification
+        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 ddt2 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
+
+// ************************************************************************* //

src/postProcessing/functionObjects/utilities/ddt2/ddt2FunctionObject.C

@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     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 "ddt2FunctionObject.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineNamedTemplateTypeNameAndDebug(ddt2FunctionObject, 0);
+
+    addToRunTimeSelectionTable
+    (
+        functionObject,
+        ddt2FunctionObject,
+        dictionary
+    );
+}
+
+// ************************************************************************* //

src/postProcessing/functionObjects/utilities/ddt2/ddt2FunctionObject.H

@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     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::ddt2FunctionObject
+
+Description
+    FunctionObject wrapper around ddt2 to allow it to be created
+    via the functions entry within controlDict.
+
+SourceFiles
+    ddt2FunctionObject.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef ddt2FunctionObject_H
+#define ddt2FunctionObject_H
+
+#include "ddt2.H"
+#include "OutputFilterFunctionObject.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef OutputFilterFunctionObject<ddt2> ddt2FunctionObject;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //