fanPressureFvPatchScalarField.C

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License
    This file is part of OpenFOAM.
 
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    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.
 
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    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/>.
 
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#include "fanPressureFvPatchScalarField.H"
#include "addToRunTimeSelectionTable.H"
#include "volFields.H"
#include "surfaceFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
    template<>
    const char* NamedEnum
    <
        fanPressureFvPatchScalarField::fanFlowDirection,
        2
    >::names[] =
    {
        "in",
        "out"
    };
}
 
const Foam::NamedEnum
<
    Foam::fanPressureFvPatchScalarField::fanFlowDirection,
    2
> Foam::fanPressureFvPatchScalarField::fanFlowDirectionNames_;
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
:
    totalPressureFvPatchScalarField(p, iF, dict),
    fanCurve_(Function1<scalar>::New("fanCurve", dict)),
    direction_(fanFlowDirectionNames_.read(dict.lookup("direction")))
{}
 
 
Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
(
    const fanPressureFvPatchScalarField& pfopsf,
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    totalPressureFvPatchScalarField(pfopsf, p, iF, mapper),
    fanCurve_(pfopsf.fanCurve_, false),
    direction_(pfopsf.direction_)
{}
 
 
Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
(
    const fanPressureFvPatchScalarField& pfopsf,
    const DimensionedField<scalar, volMesh>& iF
)
:
    totalPressureFvPatchScalarField(pfopsf, iF),
    fanCurve_(pfopsf.fanCurve_, false),
    direction_(pfopsf.direction_)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::fanPressureFvPatchScalarField::updateCoeffs()
{
    if (updated())
    {
        return;
    }
 
    const fvsPatchField<scalar>& phip =
        patch().lookupPatchField<surfaceScalarField, scalar>(phiName_);
 
    const fvPatchField<vector>& Up =
        patch().lookupPatchField<volVectorField, vector>(UName_);
 
    const int sign = direction_ ? +1 : -1;
 
    // Get the volumetric flow rate
    scalar volFlowRate = 0;
    if (phip.internalField().dimensions() == dimFlux)
    {
        volFlowRate = sign*gSum(phip);
    }
    else if
    (
        phip.internalField().dimensions() == dimMassFlux
    )
    {
        const scalarField& rhop =
            patch().lookupPatchField<volScalarField, scalar>(rhoName_);
 
        volFlowRate = sign*gSum(phip/rhop);
    }
    else
    {
        FatalErrorInFunction
            << "dimensions of phi are not correct"
            << "\n    on patch " << patch().name()
            << " of field " << internalField().name()
            << " in file " << internalField().objectPath() << nl
            << exit(FatalError);
    }
 
    // Pressure drop for this flow rate
    const scalar dp0 = fanCurve_->value(max(volFlowRate, scalar(0)));
 
    dynamicPressureFvPatchScalarField::updateCoeffs
    (
        p0_ - sign*dp0,
        -0.5*neg(phip)*magSqr(Up)
    );
}
 
 
void Foam::fanPressureFvPatchScalarField::write(Ostream& os) const
{
    totalPressureFvPatchScalarField::write(os);
    writeEntry(os, fanCurve_());
    writeEntry(os, "direction", fanFlowDirectionNames_[direction_]);
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
    makePatchTypeField
    (
        fvPatchScalarField,
        fanPressureFvPatchScalarField
    );
};
 
 
// ************************************************************************* //