376b51b58b
The population balance model considers dilatation originating from density change and mass transfer via source terms describing nucleation as well as "drift" of the size distribution to smaller or larger sizes. Numerically, the treatment does not necessarily equal the total dilatation, hence a correction is introduced to ensure boundedness of the size group fractions. Patch contributed by Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden - Rossendorf (HZDR) and VTT Technical Research Centre of Finland Ltd.
178 lines
4.9 KiB
C++
178 lines
4.9 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2018-2022 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 "phaseChange.H"
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#include "addToRunTimeSelectionTable.H"
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#include "phaseSystem.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace diameterModels
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{
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namespace driftModels
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{
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defineTypeNameAndDebug(phaseChange, 0);
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addToRunTimeSelectionTable(driftModel, phaseChange, dictionary);
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}
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::diameterModels::driftModels::phaseChange::phaseChange
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(
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const populationBalanceModel& popBal,
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const dictionary& dict
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)
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:
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driftModel(popBal, dict),
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interfaces_
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(
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dict.lookup("interfaces"),
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phaseInterface::iNew(popBal_.fluid())
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),
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numberWeighted_(dict.lookupOrDefault<Switch>("numberWeighted", false)),
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W_(interfaces_.size()),
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dmdtfName_(dict.lookup("dmdtf")),
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specieName_(dict.lookupOrDefault("specie", word()))
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{
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forAll(interfaces_, i)
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{
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W_.set
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(
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i,
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new volScalarField
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(
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IOobject
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(
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IOobject::groupName(type() + ":W", interfaces_[i].name()),
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popBal_.mesh().time().timeName(),
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popBal_.mesh()
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),
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popBal_.mesh(),
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dimensionedScalar
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(
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inv(numberWeighted_ ? dimVolume : dimLength),
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Zero
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)
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)
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);
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}
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void Foam::diameterModels::driftModels::phaseChange::precompute()
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{
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forAll(interfaces_, i)
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{
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W_[i] = Zero;
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}
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forAll(interfaces_, k)
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{
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forAllConstIter
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(
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HashTable<const velocityGroup*>,
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popBal_.velocityGroupPtrs(),
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iter
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)
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{
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const velocityGroup& velGrp = *iter();
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if (interfaces_[k].contains(velGrp.phase()))
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{
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forAll(velGrp.sizeGroups(), i)
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{
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const sizeGroup& fi = velGrp.sizeGroups()[i];
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if (numberWeighted_)
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{
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W_[k] += fi*max(fi.phase(), small)/fi.x();
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}
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else
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{
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W_[k] += fi*max(fi.phase(), small)/fi.x()*fi.a();
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}
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}
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}
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}
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}
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}
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void Foam::diameterModels::driftModels::phaseChange::addToDriftRate
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(
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volScalarField& driftRate,
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const label i
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)
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{
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const velocityGroup& velGrp = popBal_.sizeGroups()[i].VelocityGroup();
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forAll(interfaces_, k)
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{
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if (interfaces_[k].contains(velGrp.phase()))
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{
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const volScalarField& dmidtf =
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popBal_.mesh().lookupObject<volScalarField>
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(
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IOobject::groupName
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(
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IOobject::groupName
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(
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dmdtfName_,
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specieName_
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),
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interfaces_[k].name()
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)
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);
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const scalar dmidtfSign =
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interfaces_[k].index(velGrp.phase()) == 0 ? +1 : -1;
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const sizeGroup& fi = popBal_.sizeGroups()[i];
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tmp<volScalarField> dDriftRate
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(
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dmidtfSign*dmidtf/(fi.phase().rho()*W_[k])
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);
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if (!numberWeighted_)
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{
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dDriftRate.ref() *= fi.a();
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}
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driftRate += velGrp.phase()*dDriftRate;
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}
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}
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}
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// ************************************************************************* //
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