functionObjects: Simplified and reorganised using the fieldExpression base-class

src/postProcessing/functionObjects/field/Lambda2/Lambda2.C

@@ -0,0 +1,140 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013-2016 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 "Lambda2.H"
+#include "volFields.H"
+#include "zeroGradientFvPatchFields.H"
+#include "fvcGrad.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+    defineTypeNameAndDebug(Lambda2, 0);
+
+    addToRunTimeSelectionTable
+    (
+        functionObject,
+        Lambda2,
+        dictionary
+    );
+}
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::functionObjects::Lambda2::Lambda2
+(
+    const word& name,
+    const Time& runTime,
+    const dictionary& dict
+)
+:
+    fvMeshFunctionObject(name, runTime, dict)
+{
+    read(dict);
+
+    volScalarField* Lambda2Ptr
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                type(),
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh_,
+            dimensionedScalar("0", dimless/sqr(dimTime), 0.0)
+        )
+    );
+
+    mesh_.objectRegistry::store(Lambda2Ptr);
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::functionObjects::Lambda2::~Lambda2()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::functionObjects::Lambda2::read(const dictionary& dict)
+{
+    UName_ = dict.lookupOrDefault<word>("U", "U");
+
+    return true;
+}
+
+
+bool Foam::functionObjects::Lambda2::execute(const bool postProcess)
+{
+    const volVectorField& U =
+        mesh_.lookupObject<volVectorField>(UName_);
+
+    const volTensorField gradU(fvc::grad(U));
+
+    const volTensorField SSplusWW
+    (
+        (symm(gradU) & symm(gradU))
+      + (skew(gradU) & skew(gradU))
+    );
+
+    volScalarField& Lambda2 =
+        const_cast<volScalarField&>
+        (
+            mesh_.lookupObject<volScalarField>(type())
+        );
+
+    Lambda2 = -eigenValues(SSplusWW)().component(vector::Y);
+
+    return true;
+}
+
+
+bool Foam::functionObjects::Lambda2::write(const bool postProcess)
+{
+    const volScalarField& Lambda2 =
+        obr_.lookupObject<volScalarField>(type());
+
+    Info<< type() << " " << name() << " output:" << nl
+        << "    writing field " << Lambda2.name() << nl
+        << endl;
+
+    Lambda2.write();
+
+    return true;
+}
+
+
+// ************************************************************************* //

src/postProcessing/functionObjects/field/Lambda2/Lambda2.H

@@ -0,0 +1,122 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013-2016 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::Lambda2
+
+Group
+    grpUtilitiesFunctionObjects
+
+Description
+    This function object calculates and outputs the second largest eigenvalue
+    of the sum of the square of the symmetrical and anti-symmetrical parts of
+    the velocity gradient tensor.
+
+SeeAlso
+    Foam::functionObjects::fvMeshFunctionObject
+
+SourceFiles
+    Lambda2.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef functionObjects_Lambda2_H
+#define functionObjects_Lambda2_H
+
+#include "fvMeshFunctionObject.H"
+#include "volFieldsFwd.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace functionObjects
+{
+
+/*---------------------------------------------------------------------------*\
+                          Class Lambda2 Declaration
+\*---------------------------------------------------------------------------*/
+
+class Lambda2
+:
+    public fvMeshFunctionObject
+{
+    // Private data
+
+        //- Name of velocity field, default is "U"
+        word UName_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        Lambda2(const Lambda2&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const Lambda2&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("Lambda2");
+
+
+    // Constructors
+
+        //- Construct from Time and dictionary
+        Lambda2
+        (
+            const word& name,
+            const Time& runTime,
+            const dictionary& dict
+        );
+
+
+    //- Destructor
+    virtual ~Lambda2();
+
+
+    // Member Functions
+
+        //- Read the Lambda2 data
+        virtual bool read(const dictionary&);
+
+        //- Calculate Lambda2
+        virtual bool execute(const bool postProcess = false);
+
+        //- Write Lambda2
+        virtual bool write(const bool postProcess = false);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace functionObjects
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //