18200e72a6
The central coefficient part of the virtual-mass phase acceleration matrix is now included in the phase velocity transport central coefficient + drag matrix so that the all the phase contributions to each phase momentum equation are handled implicitly and consistently without lagging contribution from the other phases in either the pressure equation or phase momentum correctors. This improves the conditioning of the pressure equation and convergence rate of bubbly-flow cases.
307 lines
8.6 KiB
C++
307 lines
8.6 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) 2018-2023 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 "phaseForces.H"
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#include "addToRunTimeSelectionTable.H"
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#include "fvcGrad.H"
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#include "dragModel.H"
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#include "virtualMassModel.H"
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#include "liftModel.H"
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#include "wallLubricationModel.H"
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#include "turbulentDispersionModel.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace functionObjects
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{
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defineTypeNameAndDebug(phaseForces, 0);
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addToRunTimeSelectionTable(functionObject, phaseForces, dictionary);
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::functionObjects::phaseForces::phaseForces
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(
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const word& name,
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const Time& runTime,
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const dictionary& dict
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)
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:
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fvMeshFunctionObject(name, runTime, dict),
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phase_
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(
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mesh_.lookupObject<phaseModel>
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(
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IOobject::groupName("alpha", dict.lookup("phase"))
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)
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),
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fluid_(mesh_.lookupObject<phaseSystem>(phaseSystem::propertiesName))
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{
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read(dict);
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forAll(fluid_.phases(), phasei)
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{
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const phaseModel& otherPhase = fluid_.phases()[phasei];
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if (&otherPhase == &phase_) continue;
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const phaseInterface interface(phase_, otherPhase);
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if (fluid_.foundInterfacialModel<blendedDragModel>(interface))
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{
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forceFields_.insert
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(
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dragModel::typeName,
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new volVectorField
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(
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IOobject
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(
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IOobject::groupName("dragForce", phase_.name()),
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mesh_.time().name(),
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mesh_
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),
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mesh_,
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dimensionedVector(dimForce/dimVolume, Zero)
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)
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);
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}
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if (fluid_.foundInterfacialModel<blendedVirtualMassModel>(interface))
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{
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forceFields_.insert
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(
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virtualMassModel::typeName,
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new volVectorField
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(
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IOobject
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(
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IOobject::groupName
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(
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"virtualMassForce",
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phase_.name()
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),
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mesh_.time().name(),
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mesh_
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),
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mesh_,
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dimensionedVector(dimForce/dimVolume, Zero)
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)
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);
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}
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if (fluid_.foundInterfacialModel<blendedLiftModel>(interface))
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{
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forceFields_.insert
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(
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liftModel::typeName,
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new volVectorField
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(
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IOobject
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(
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IOobject::groupName("liftForce", phase_.name()),
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mesh_.time().name(),
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mesh_
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),
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mesh_,
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dimensionedVector(dimForce/dimVolume, Zero)
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)
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);
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}
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if
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(
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fluid_.foundInterfacialModel
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<blendedWallLubricationModel>(interface)
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)
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{
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forceFields_.insert
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(
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wallLubricationModel::typeName,
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new volVectorField
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(
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IOobject
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(
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IOobject::groupName
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(
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"wallLubricationForce",
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phase_.name()
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),
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mesh_.time().name(),
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mesh_
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),
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mesh_,
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dimensionedVector(dimForce/dimVolume, Zero)
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)
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);
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}
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if
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(
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fluid_.foundInterfacialModel
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<blendedTurbulentDispersionModel>(interface)
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)
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{
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forceFields_.insert
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(
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turbulentDispersionModel::typeName,
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new volVectorField
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(
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IOobject
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(
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IOobject::groupName
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(
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"turbulentDispersionForce",
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phase_.name()
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),
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mesh_.time().name(),
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mesh_
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),
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mesh_,
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dimensionedVector(dimForce/dimVolume, 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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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::functionObjects::phaseForces::~phaseForces()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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bool Foam::functionObjects::phaseForces::read(const dictionary& dict)
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{
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fvMeshFunctionObject::read(dict);
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return true;
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}
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bool Foam::functionObjects::phaseForces::execute()
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{
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// Zero the force fields
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forAllConstIter
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(
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HashPtrTable<volVectorField>,
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forceFields_,
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forceFieldIter
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)
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{
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*forceFieldIter() = Zero;
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}
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// Add the forces from all the interfaces which contain this phase
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forAll(fluid_.phases(), phasei)
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{
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const phaseModel& otherPhase = fluid_.phases()[phasei];
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if (&otherPhase == &phase_) continue;
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const phaseInterface interface(phase_, otherPhase);
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if (fluid_.foundInterfacialModel<blendedDragModel>(interface))
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{
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*forceFields_[dragModel::typeName] +=
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fluid_.lookupInterfacialModel<blendedDragModel>(interface).K()
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*(otherPhase.U() - phase_.U());
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}
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if (fluid_.foundInterfacialModel<blendedVirtualMassModel>(interface))
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{
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*forceFields_[virtualMassModel::typeName] +=
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fluid_.lookupInterfacialModel
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<blendedVirtualMassModel>(interface).K()
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*(
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(otherPhase.DUDt() & otherPhase.U())
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- (phase_.DUDt() & phase_.U())
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);
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}
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if (fluid_.foundInterfacialModel<blendedLiftModel>(interface))
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{
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*forceFields_[liftModel::typeName] +=
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(&interface.phase1() == &phase_ ? -1 : +1)
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*fluid_.lookupInterfacialModel<blendedLiftModel>(interface).F();
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}
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if
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(
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fluid_.foundInterfacialModel
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<blendedWallLubricationModel>(interface)
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)
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{
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*forceFields_[wallLubricationModel::typeName] +=
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(&interface.phase1() == &phase_ ? -1 : +1)
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*fluid_.lookupInterfacialModel
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<blendedWallLubricationModel>(interface).F();
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}
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if
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(
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fluid_.foundInterfacialModel
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<blendedTurbulentDispersionModel>(interface)
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)
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{
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*forceFields_[turbulentDispersionModel::typeName] +=
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fluid_.lookupInterfacialModel
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<blendedTurbulentDispersionModel>(interface).D()
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*fvc::grad
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(
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otherPhase
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/max(phase_ + otherPhase, otherPhase.residualAlpha())
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);
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}
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}
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return true;
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}
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bool Foam::functionObjects::phaseForces::write()
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{
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forAllConstIter
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(
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HashPtrTable<volVectorField>,
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forceFields_,
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forceFieldIter
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)
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{
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writeObject(forceFieldIter()->name());
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}
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return true;
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}
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// ************************************************************************* //
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