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In the 'standard' and 'UaGradU' options for the ATC term of the adjoint equations, there is an option to add 'aritificial dissipation', by adding and subtracting a multiple of the adjoint convection term with different discretizations. The implicit part was not multiplied with the ATClimiter whereas the explicit one was, leading to mismatched contributions in the areas affected by the ATClimiter, which could affect the sensitivity derivatives.
142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
/*---------------------------------------------------------------------------*\
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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 | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2007-2023 PCOpt/NTUA
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Copyright (C) 2013-2023 FOSS GP
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Copyright (C) 2019 OpenCFD Ltd.
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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 "ATCUaGradU.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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defineTypeNameAndDebug(ATCUaGradU, 0);
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addToRunTimeSelectionTable
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(
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ATCModel,
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ATCUaGradU,
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dictionary
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);
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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ATCUaGradU::ATCUaGradU
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(
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const fvMesh& mesh,
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const incompressibleVars& primalVars,
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const incompressibleAdjointVars& adjointVars,
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const dictionary& dict
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)
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:
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ATCModel(mesh, primalVars, adjointVars, dict)
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void ATCUaGradU::addATC(fvVectorMatrix& UaEqn)
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{
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const volVectorField& U = primalVars_.U();
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const volVectorField& Ua = adjointVars_.UaInst();
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const surfaceScalarField& phi = primalVars_.phi();
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const surfaceScalarField& phia = adjointVars_.phiaInst();
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// Build Ua to go into the ATC term, based on whether to smooth field or not
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autoPtr<volVectorField> UaForATC(nullptr);
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if (reconstructGradients_)
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{
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UaForATC.reset(new volVectorField(fvc::reconstruct(phia)));
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}
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else
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{
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UaForATC.reset(new volVectorField(Ua));
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}
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// Main ATC term
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ATC_ = -fvc::grad(UaForATC(), "gradUaATC") & U;
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if (extraConvection_ > 0)
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{
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// Implicit part added to increase diagonal dominance
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UaEqn += ATClimiter_*extraConvection_*fvm::div(-phi, Ua);
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// Correct rhs due to implicitly augmenting the adjoint convection
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ATC_ += extraConvection_*(fvc::grad(UaForATC(), "gradUaATC")().T() & U);
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}
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// Zero ATC on cells next to given patch types
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smoothATC();
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// Actual ATC term
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UaEqn += ATC_.internalField();
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}
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tmp<volTensorField> ATCUaGradU::getFISensitivityTerm() const
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{
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tmp<volTensorField> tvolSDTerm
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(
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new volTensorField
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(
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IOobject
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(
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"ATCFISensitivityTerm" + type(),
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mesh_.time().timeName(),
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mesh_,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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mesh_,
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dimensionedTensor(sqr(dimLength)/pow(dimTime, 3), Zero)
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)
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);
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volTensorField& volSDTerm = tvolSDTerm.ref();
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const volVectorField& U = primalVars_.U();
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const volVectorField& Ua = adjointVars_.Ua();
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//const volScalarField& mask = getLimiter();
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volSDTerm -=
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Ua.component(0) * fvc::grad(U.component(0) * U)
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+ Ua.component(1) * fvc::grad(U.component(1) * U)
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+ Ua.component(2) * fvc::grad(U.component(2) * U);
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return tvolSDTerm;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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