ENH: Added new pressureDrop porosity model

src/finiteVolume/Make/files

@@ -381,8 +381,9 @@ $(porosity)/porosityModel/porosityModelNew.C
 $(porosity)/porosityModel/porosityModelList.C
 $(porosity)/porosityModel/IOporosityModelList.C
 $(porosity)/DarcyForchheimer/DarcyForchheimer.C
-$(porosity)/powerLaw/powerLaw.C
 $(porosity)/fixedCoeff/fixedCoeff.C
+$(porosity)/powerLaw/powerLaw.C
+$(porosity)/pressureDrop/pressureDrop.C
 
 MRF = $(general)/MRF
 $(MRF)/MRFZone.C

src/finiteVolume/cfdTools/general/porosityModel/pressureDrop/pressureDrop.C

@@ -0,0 +1,144 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013 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 "addToRunTimeSelectionTable.H"
+#include "pressureDrop.H"
+#include "fvMatrices.H"
+#include "geometricOneField.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace porosityModels
+    {
+        defineTypeNameAndDebug(pressureDrop, 0);
+        addToRunTimeSelectionTable(porosityModel, pressureDrop, mesh);
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::porosityModels::pressureDrop::pressureDrop
+(
+    const word& name,
+    const word& modelType,
+    const fvMesh& mesh,
+    const dictionary& dict,
+    const word& cellZoneName
+)
+:
+    porosityModel(name, modelType, mesh, dict, cellZoneName),
+    coordSys_(coeffs_, mesh),
+    mDotvsDp_(DataEntry<scalar>::New("mDotvsDp", coeffs_)),
+    lRef_(readScalar(coeffs_.lookup("lRef"))),
+    rhoName_(coeffs_.lookupOrDefault<word>("rho", "rho"))
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::porosityModels::pressureDrop::~pressureDrop()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::porosityModels::pressureDrop::correct
+(
+    fvVectorMatrix& UEqn
+) const
+{
+    const vectorField& U = UEqn.psi();
+    const scalarField& V = mesh_.V();
+    scalarField& Udiag = UEqn.diag();
+    vectorField& Usource = UEqn.source();
+
+    scalar rhoScale = 1.0;
+    if (UEqn.dimensions() == dimForce)
+    {
+        const volScalarField& rho =
+            mesh_.lookupObject<volScalarField>(rhoName_);
+
+        apply(Udiag, Usource, V, rho, U, rhoScale);
+    }
+    else
+    {
+        coeffs_.lookup("rhoRef") >> rhoScale;
+        apply(Udiag, Usource, V, geometricOneField(), U, rhoScale);
+    }
+
+}
+
+
+void Foam::porosityModels::pressureDrop::correct
+(
+    fvVectorMatrix& UEqn,
+    const volScalarField& rho,
+    const volScalarField&
+) const
+{
+    const vectorField& U = UEqn.psi();
+    const scalarField& V = mesh_.V();
+    scalarField& Udiag = UEqn.diag();
+    vectorField& Usource = UEqn.source();
+
+    apply(Udiag, Usource, V, rho, U, 1.0);
+}
+
+
+void Foam::porosityModels::pressureDrop::correct
+(
+    const fvVectorMatrix& UEqn,
+    volTensorField& AU
+) const
+{
+    const vectorField& U = UEqn.psi();
+
+    scalar rhoScale = 1.0;
+    if (UEqn.dimensions() == dimForce)
+    {
+        const volScalarField& rho =
+            mesh_.lookupObject<volScalarField>(rhoName_);
+
+        apply(AU, rho, U, rhoScale);
+    }
+    else
+    {
+        coeffs_.lookup("rhoRef") >> rhoScale;
+        apply(AU, geometricOneField(), U, rhoScale);
+    }
+}
+
+
+void Foam::porosityModels::pressureDrop::writeData(Ostream& os) const
+{
+    os  << indent << name_ << endl;
+    dict_.write(os);
+}
+
+
+// ************************************************************************* //

src/finiteVolume/cfdTools/general/porosityModel/pressureDrop/pressureDrop.H

@@ -0,0 +1,206 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013 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::pressureDrop
+
+Description
+    Pressure drop porosity model, whereby the user speciefies the pressure
+    drop per unit length as a function of mass flow rate, over a fixed distance.
+
+    Example usage:
+    \verbatim
+    pressureDropCoeffs
+    {
+        coordinateSystem
+        {
+            e1  (1 0 0);
+            e2  (0 1 0);
+        }
+
+        lRef    0.5;
+
+        mDotvsDp table
+        (
+            (0   0)
+            (0.2 20)
+            (0.4 40)
+            (0.6 65)
+            (0.8 95)
+            (1.0 125)
+            (1.5 220)
+            (2.0 320)
+            (2.5 435)
+            (3.0 560)
+            (3.5 700)
+        );
+    }
+    \endverbatim
+
+Note
+    The mDotvsDp entry is a DataEntry type, able to describe the pressure drop
+    per unit length as a function mass flow rate.  The example above gives the
+    usage for supplying in-line tabulated data.
+
+SeeAlso
+    Foam::DataEntry
+
+SourceFiles
+    pressureDrop.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef pressureDrop_H
+#define pressureDrop_H
+
+#include "porosityModel.H"
+#include "coordinateSystem.H"
+#include "autoPtr.H"
+#include "DataEntry.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace porosityModels
+{
+
+/*---------------------------------------------------------------------------*\
+                      Class pressureDrop Declaration
+\*---------------------------------------------------------------------------*/
+
+class pressureDrop
+:
+    public porosityModel
+{
+private:
+
+    // Private data
+
+        //- Local co-ordinate system
+        coordinateSystem coordSys_;
+
+        //- Pressure drop per unit length [Pa/m] as a function of
+        //  mass flow rate [kg/s]
+        autoPtr<DataEntry<scalar> > mDotvsDp_;
+
+        //- Distance over which pressure drop is applied
+        scalar lRef_;
+
+        //- Name of density field
+        word rhoName_;
+
+
+    // Private Member Functions
+
+        //- Apply
+        template<class RhoFieldType>
+        void apply
+        (
+            scalarField& Udiag,
+            vectorField& Usource,
+            const scalarField& V,
+            const RhoFieldType& rho,
+            const vectorField& U,
+            const scalar rhoScale
+        ) const;
+
+        //- Apply
+        template<class RhoFieldType>
+        void apply
+        (
+            tensorField& AU,
+            const RhoFieldType& rho,
+            const vectorField& U,
+            const scalar rhoScale
+        ) const;
+
+        //- Disallow default bitwise copy construct
+        pressureDrop(const pressureDrop&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const pressureDrop&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("pressureDrop");
+
+    //- Constructor
+    pressureDrop
+    (
+        const word& name,
+        const word& modelType,
+        const fvMesh& mesh,
+        const dictionary& dict,
+        const word& cellZoneName
+    );
+
+    //- Destructor
+    virtual ~pressureDrop();
+
+
+    // Member Functions
+
+        //- Add resistance
+        virtual void correct(fvVectorMatrix& UEqn) const;
+
+        //- Add resistance
+        virtual void correct
+        (
+            fvVectorMatrix& UEqn,
+            const volScalarField& rho,
+            const volScalarField& mu
+        ) const;
+
+        //- Add resistance
+        virtual void correct
+        (
+            const fvVectorMatrix& UEqn,
+            volTensorField& AU
+        ) const;
+
+
+    // I-O
+
+        //- Write
+        void writeData(Ostream& os) const;
+};
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace porosityModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "pressureDropTemplates.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteVolume/cfdTools/general/porosityModel/pressureDrop/pressureDropTemplates.C

@@ -0,0 +1,89 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013 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/>.
+
+\*---------------------------------------------------------------------------*/
+
+template<class RhoFieldType>
+void Foam::porosityModels::pressureDrop::apply
+(
+    scalarField& Udiag,
+    vectorField& Usource,
+    const scalarField& V,
+    const RhoFieldType& rho,
+    const vectorField& U,
+    const scalar rhoScale
+) const
+{
+    // local-to-global transformation tensor
+    const tensor& E = coordSys_.R();
+
+    forAll(cellZoneIds_, zoneI)
+    {
+        const labelList& cells = mesh_.cellZones()[cellZoneIds_[zoneI]];
+
+        forAll(cells, i)
+        {
+            const label cellI = cells[i];
+            const scalar magU = mag(U[cellI]);
+            const scalar mDot = rho[cellI]*magU;
+            const scalar dp = mDotvsDp_->value(mDot);
+            const tensor Cd = E*dp/(lRef_*magU*rhoScale + ROOTVSMALL);
+            const scalar isoCd = tr(Cd);
+
+            Udiag[cellI] += V[cellI]*isoCd;
+            Usource[cellI] -= V[cellI]*((Cd - I*isoCd) & U[cellI]);
+        }
+    }
+}
+
+
+template<class RhoFieldType>
+void Foam::porosityModels::pressureDrop::apply
+(
+    tensorField& AU,
+    const RhoFieldType& rho,
+    const vectorField& U,
+    const scalar rhoScale
+) const
+{
+    // local-to-global transformation tensor
+    const tensor& E = coordSys_.R();
+
+    forAll(cellZoneIds_, zoneI)
+    {
+        const labelList& cells = mesh_.cellZones()[cellZoneIds_[zoneI]];
+
+        forAll(cells, i)
+        {
+            const label cellI = cells[i];
+            const scalar magU = mag(U[cellI]);
+            const scalar mDot = rho[cellI]*magU;
+            const scalar dp = mDotvsDp_->value(mDot);
+
+            AU[cellI] += E*dp/(lRef_*magU*rhoScale + ROOTVSMALL);
+        }
+    }
+}
+
+
+// ************************************************************************* //