outletPhaseMeanVelocityFvPatchVectorField: New BC for the outlet of a towing-tank to maintain the water level at the same level as the inlet
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2013 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "outletPhaseMeanVelocityFvPatchVectorField.H"
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#include "volFields.H"
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#include "addToRunTimeSelectionTable.H"
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#include "fvPatchFieldMapper.H"
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#include "surfaceFields.H"
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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::outletPhaseMeanVelocityFvPatchVectorField
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(
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF
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)
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:
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mixedFvPatchField<vector>(p, iF),
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Umean_(0),
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alphaName_("none")
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{
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refValue() = vector::zero;
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refGrad() = vector::zero;
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valueFraction() = 0.0;
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}
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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::outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField& ptf,
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF,
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const fvPatchFieldMapper& mapper
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)
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:
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mixedFvPatchField<vector>(ptf, p, iF, mapper),
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Umean_(ptf.Umean_),
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alphaName_(ptf.alphaName_)
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{}
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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::outletPhaseMeanVelocityFvPatchVectorField
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(
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF,
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const dictionary& dict
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)
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:
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mixedFvPatchField<vector>(p, iF),
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Umean_(readScalar(dict.lookup("Umean"))),
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alphaName_(dict.lookup("alpha"))
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{
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refValue() = vector::zero;
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refGrad() = vector::zero;
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valueFraction() = 0.0;
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if (dict.found("value"))
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{
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fvPatchVectorField::operator=
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(
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vectorField("value", dict, p.size())
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);
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}
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else
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{
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fvPatchVectorField::operator=(patchInternalField());
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}
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}
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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::outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField& ptf
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)
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:
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mixedFvPatchField<vector>(ptf),
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Umean_(ptf.Umean_),
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alphaName_(ptf.alphaName_)
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{}
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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::outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField& ptf,
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const DimensionedField<vector, volMesh>& iF
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)
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:
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mixedFvPatchField<vector>(ptf, iF),
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Umean_(ptf.Umean_),
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alphaName_(ptf.alphaName_)
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void Foam::outletPhaseMeanVelocityFvPatchVectorField::updateCoeffs()
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{
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if (updated())
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{
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return;
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}
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scalarField alphap =
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patch().lookupPatchField<volScalarField, scalar>(alphaName_);
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alphap = max(alphap, scalar(0));
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alphap = min(alphap, scalar(1));
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// Get the patchInternalField (zero-gradient field)
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vectorField Uzg(patchInternalField());
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// Calculate the phase mean zero-gradient velocity
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scalar Uzgmean =
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gSum(alphap*(patch().Sf() & Uzg))
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/gSum(alphap*patch().magSf());
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// Set the refValue and valueFraction to adjust the boundary field
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// such that the phase mean is Umean_
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if (Uzgmean >= Umean_)
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{
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refValue() = vector::zero;
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valueFraction() = 1.0 - Umean_/Uzgmean;
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}
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else
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{
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refValue() = (Umean_ + Uzgmean)*patch().nf();
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valueFraction() = 1.0 - Uzgmean/Umean_;
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}
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mixedFvPatchField<vector>::updateCoeffs();
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}
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void Foam::outletPhaseMeanVelocityFvPatchVectorField::write
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(
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Ostream& os
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) const
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{
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fvPatchField<vector>::write(os);
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os.writeKeyword("Umean") << Umean_
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<< token::END_STATEMENT << nl;
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os.writeKeyword("alpha") << alphaName_
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<< token::END_STATEMENT << nl;
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writeEntry("value", os);
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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makePatchTypeField
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(
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fvPatchVectorField,
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outletPhaseMeanVelocityFvPatchVectorField
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);
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}
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// ************************************************************************* //
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@ -0,0 +1,197 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2013 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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||||
under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
|
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|
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::outletPhaseMeanVelocityFvPatchVectorField
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Group
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grpOutletBoundaryConditions
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Description
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This boundary condition adjusts the velocity for the given phase to achieve
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the specified mean thus causing the phase-fraction to adjust according to
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the mass flow rate.
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Typical usage is as the outlet condition for a towing-tank ship simulation
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to maintain the outlet water level at the level as the inlet.
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\heading Patch usage
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\table
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Property | Description | Required | Default value
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Umean | mean velocity normal to the boundary [m/s] | yes |
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alpha | phase-fraction field | yes |
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\endtable
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Example of the boundary condition specification:
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\verbatim
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myPatch
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{
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type outletPhaseMeanVelocity;
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Umean 1.2;
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alpha alpha.water;
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value uniform (1.2 0 0);
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}
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\endverbatim
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SeeAlso
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Foam::mixedFvPatchField
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Foam::variableHeightFlowRateInletVelocityFvPatchVectorField
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SourceFiles
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outletPhaseMeanVelocityFvPatchVectorField.C
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\*---------------------------------------------------------------------------*/
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#ifndef outletPhaseMeanVelocityFvPatchVectorField_H
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#define outletPhaseMeanVelocityFvPatchVectorField_H
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#include "mixedFvPatchFields.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Class outletPhaseMeanVelocityFvPatchVectorField Declaration
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\*---------------------------------------------------------------------------*/
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class outletPhaseMeanVelocityFvPatchVectorField
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:
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public mixedFvPatchVectorField
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{
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// Private data
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//- Inlet integral flow rate
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scalar Umean_;
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//- Name of the phase-fraction field
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word alphaName_;
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public:
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//- Runtime type information
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TypeName("outletPhaseMeanVelocity");
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// Constructors
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//- Construct from patch and internal field
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outletPhaseMeanVelocityFvPatchVectorField
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(
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const fvPatch&,
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const DimensionedField<vector, volMesh>&
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);
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//- Construct from patch, internal field and dictionary
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outletPhaseMeanVelocityFvPatchVectorField
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(
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const fvPatch&,
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const DimensionedField<vector, volMesh>&,
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const dictionary&
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);
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//- Construct by mapping given
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// outletPhaseMeanVelocityFvPatchVectorField
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// onto a new patch
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outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField&,
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const fvPatch&,
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const DimensionedField<vector, volMesh>&,
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const fvPatchFieldMapper&
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);
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//- Construct as copy
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outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField&
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);
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//- Construct and return a clone
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virtual tmp<fvPatchVectorField> clone() const
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{
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return tmp<fvPatchVectorField>
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(
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new outletPhaseMeanVelocityFvPatchVectorField(*this)
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);
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}
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//- Construct as copy setting internal field reference
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outletPhaseMeanVelocityFvPatchVectorField
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(
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const outletPhaseMeanVelocityFvPatchVectorField&,
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const DimensionedField<vector, volMesh>&
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);
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//- Construct and return a clone setting internal field reference
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virtual tmp<fvPatchVectorField> clone
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(
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const DimensionedField<vector, volMesh>& iF
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) const
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{
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return tmp<fvPatchVectorField>
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(
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new outletPhaseMeanVelocityFvPatchVectorField
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(
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*this,
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iF
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)
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);
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}
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// Member functions
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// Access
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//- Return the flux
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scalar Umean() const
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{
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return Umean_;
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}
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//- Return reference to the flux to allow adjustment
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scalar& Umean()
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{
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return Umean_;
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}
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//- Update the coefficients associated with the patch field
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virtual void updateCoeffs();
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//- Write
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virtual void write(Ostream&) const;
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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