Commit f3d4e512 authored by Henry Weller's avatar Henry Weller
Browse files

prghTotalPressureFvPatchScalarField: Total pressure BC for p_rgh

Resolves some stability issues with the outlet of multiphase problems.
parent d3b8af85
......@@ -199,6 +199,7 @@ $(derivedFvPatchFields)/waveTransmissive/waveTransmissiveFvPatchFields.C
$(derivedFvPatchFields)/waveSurfacePressure/waveSurfacePressureFvPatchScalarField.C
$(derivedFvPatchFields)/interstitialInletVelocity/interstitialInletVelocityFvPatchVectorField.C
$(derivedFvPatchFields)/prghPressure/prghPressureFvPatchScalarField.C
$(derivedFvPatchFields)/prghTotalPressure/prghTotalPressureFvPatchScalarField.C
fvsPatchFields = fields/fvsPatchFields
$(fvsPatchFields)/fvsPatchField/fvsPatchFields.C
......
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015 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 "prghTotalPressureFvPatchScalarField.H"
#include "addToRunTimeSelectionTable.H"
#include "fvPatchFieldMapper.H"
#include "volFields.H"
#include "surfaceFields.H"
#include "uniformDimensionedFields.H"
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::prghTotalPressureFvPatchScalarField::
prghTotalPressureFvPatchScalarField
(
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF
)
:
fixedValueFvPatchScalarField(p, iF),
UName_("U"),
phiName_("phi"),
rhoName_("rho"),
p0_(p.size(), 0.0)
{}
Foam::prghTotalPressureFvPatchScalarField::
prghTotalPressureFvPatchScalarField
(
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF,
const dictionary& dict
)
:
fixedValueFvPatchScalarField(p, iF),
UName_(dict.lookupOrDefault<word>("U", "U")),
phiName_(dict.lookupOrDefault<word>("phi", "phi")),
rhoName_(dict.lookupOrDefault<word>("rhoName", "rho")),
p0_("p0", dict, p.size())
{
if (dict.found("value"))
{
fvPatchScalarField::operator=
(
scalarField("value", dict, p.size())
);
}
else
{
fvPatchField<scalar>::operator=(p0_);
}
}
Foam::prghTotalPressureFvPatchScalarField::
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField& ptf,
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF,
const fvPatchFieldMapper& mapper
)
:
fixedValueFvPatchScalarField(ptf, p, iF, mapper),
UName_(ptf.UName_),
phiName_(ptf.phiName_),
rhoName_(ptf.rhoName_),
p0_(ptf.p0_, mapper)
{}
Foam::prghTotalPressureFvPatchScalarField::
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField& ptf
)
:
fixedValueFvPatchScalarField(ptf),
UName_(ptf.UName_),
phiName_(ptf.phiName_),
rhoName_(ptf.rhoName_),
p0_(ptf.p0_)
{}
Foam::prghTotalPressureFvPatchScalarField::
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField& ptf,
const DimensionedField<scalar, volMesh>& iF
)
:
fixedValueFvPatchScalarField(ptf, iF),
UName_(ptf.UName_),
phiName_(ptf.phiName_),
rhoName_(ptf.rhoName_),
p0_(ptf.p0_)
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
void Foam::prghTotalPressureFvPatchScalarField::autoMap
(
const fvPatchFieldMapper& m
)
{
fixedValueFvPatchScalarField::autoMap(m);
p0_.autoMap(m);
}
void Foam::prghTotalPressureFvPatchScalarField::rmap
(
const fvPatchScalarField& ptf,
const labelList& addr
)
{
fixedValueFvPatchScalarField::rmap(ptf, addr);
const prghTotalPressureFvPatchScalarField& tiptf =
refCast<const prghTotalPressureFvPatchScalarField>(ptf);
p0_.rmap(tiptf.p0_, addr);
}
void Foam::prghTotalPressureFvPatchScalarField::updateCoeffs()
{
if (updated())
{
return;
}
const scalarField& rhop =
patch().lookupPatchField<volScalarField, scalar>(rhoName_);
const scalarField& phip =
patch().lookupPatchField<surfaceScalarField, scalar>(phiName_);
const vectorField& Up =
patch().lookupPatchField<volVectorField, vector>(UName_);
const uniformDimensionedVectorField& g =
db().lookupObject<uniformDimensionedVectorField>("g");
const uniformDimensionedScalarField& hRef =
db().lookupObject<uniformDimensionedScalarField>("hRef");
dimensionedScalar ghRef
(
mag(g.value()) > SMALL
? g & (cmptMag(g.value())/mag(g.value()))*hRef
: dimensionedScalar("ghRef", g.dimensions()*dimLength, 0)
);
operator==
(
p0_
- 0.5*rhop*(1.0 - pos(phip))*magSqr(Up)
- rhop*((g.value() & patch().Cf()) - ghRef.value())
);
fixedValueFvPatchScalarField::updateCoeffs();
}
void Foam::prghTotalPressureFvPatchScalarField::write(Ostream& os) const
{
fvPatchScalarField::write(os);
writeEntryIfDifferent<word>(os, "U", "U", UName_);
writeEntryIfDifferent<word>(os, "phi", "phi", phiName_);
writeEntryIfDifferent<word>(os, "rho", "rho", rhoName_);
p0_.writeEntry("p0", os);
writeEntry("value", os);
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
makePatchTypeField
(
fvPatchScalarField,
prghTotalPressureFvPatchScalarField
);
}
// ************************************************************************* //
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015 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::prghTotalPressureFvPatchScalarField
Group
grpGenericBoundaryConditions
Description
This boundary condition provides static pressure condition for p_rgh,
calculated as:
\f[
p_rgh = p - \rho g (h - hRef)
\f]
where
\vartable
p_rgh | Pseudo hydrostatic pressure [Pa]
p | Static pressure [Pa]
h | Height in the opposite direction to gravity
hRef | Reference height in the opposite direction to gravity
\rho | density
g | acceleration due to gravity [m/s^2]
\endtable
\heading Patch usage
\table
Property | Description | Required | Default value
rhoName | rho field name | no | rho
p | static pressure | yes |
\endtable
Example of the boundary condition specification:
\verbatim
myPatch
{
type prghTotalPressure;
rhoName rho;
p uniform 0;
value uniform 0; // optional initial value
}
\endverbatim
SeeAlso
Foam::fixedValueFvPatchScalarField
SourceFiles
prghTotalPressureFvPatchScalarField.C
\*---------------------------------------------------------------------------*/
#ifndef prghTotalPressureFvPatchScalarField_H
#define prghTotalPressureFvPatchScalarField_H
#include "fixedValueFvPatchFields.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class prghTotalPressureFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
class prghTotalPressureFvPatchScalarField
:
public fixedValueFvPatchScalarField
{
protected:
// Protected data
//- Name of the velocity field
word UName_;
//- Name of the flux transporting the field
word phiName_;
//- Name of phase-fraction field
word rhoName_;
//- Total pressure
scalarField p0_;
public:
//- Runtime type information
TypeName("prghTotalPressure");
// Constructors
//- Construct from patch and internal field
prghTotalPressureFvPatchScalarField
(
const fvPatch&,
const DimensionedField<scalar, volMesh>&
);
//- Construct from patch, internal field and dictionary
prghTotalPressureFvPatchScalarField
(
const fvPatch&,
const DimensionedField<scalar, volMesh>&,
const dictionary&
);
//- Construct by mapping given
// prghTotalPressureFvPatchScalarField onto a new patch
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField&,
const fvPatch&,
const DimensionedField<scalar, volMesh>&,
const fvPatchFieldMapper&
);
//- Construct as copy
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField&
);
//- Construct and return a clone
virtual tmp<fvPatchScalarField> clone() const
{
return tmp<fvPatchScalarField >
(
new prghTotalPressureFvPatchScalarField(*this)
);
}
//- Construct as copy setting internal field reference
prghTotalPressureFvPatchScalarField
(
const prghTotalPressureFvPatchScalarField&,
const DimensionedField<scalar, volMesh>&
);
//- Construct and return a clone setting internal field reference
virtual tmp<fvPatchScalarField> clone
(
const DimensionedField<scalar, volMesh>& iF
) const
{
return tmp<fvPatchScalarField>
(
new prghTotalPressureFvPatchScalarField(*this, iF)
);
}
// Member functions
// Access
//- Return the rhoName
const word& rhoName() const
{
return rhoName_;
}
//- Return reference to the rhoName to allow adjustment
word& rhoName()
{
return rhoName_;
}
//- Return the total pressure
const scalarField& p0() const
{
return p0_;
}
//- Return reference to the total pressure to allow adjustment
scalarField& p0()
{
return p0_;
}
// Mapping functions
//- Map (and resize as needed) from self given a mapping object
virtual void autoMap
(
const fvPatchFieldMapper&
);
//- Reverse map the given fvPatchField onto this fvPatchField
virtual void rmap
(
const fvPatchScalarField&,
const labelList&
);
// Evaluation functions
//- Update the coefficients associated with the patch field
virtual void updateCoeffs();
//- Write
virtual void write(Ostream&) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
......@@ -22,19 +22,22 @@ boundaryField
{
inlet
{
type fixedFluxPressure;
value $internalField;
type fixedFluxPressure;
value $internalField;
}
outlet
{
type prghPressure;
p $internalField;
value $internalField;
type prghTotalPressure;
p0 $internalField;
U U.air;
phi phi.air;
rho rho.air;
value $internalField;
}
walls
{
type fixedFluxPressure;
value $internalField;
type fixedFluxPressure;
value $internalField;
}
}
......
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