shapeSensitivitiesIncompressible.C

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-------------------------------------------------------------------------------
    Copyright (C) 2020 PCOpt/NTUA
    Copyright (C) 2020 FOSS GP
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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#include "shapeSensitivitiesIncompressible.H"
#include "adjointBoundaryConditions.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
namespace incompressible
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
defineTypeNameAndDebug(shapeSensitivities, 0);
 
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
void shapeSensitivities::accumulateDirectSensitivityIntegrand(const scalar dt)
{
    // Accumulate direct sensitivities
    PtrList<objective>& functions = objectiveManager_.getObjectiveFunctions();
    for (const label patchI : sensitivityPatchIDs_)
    {
        const scalarField magSfDt(mesh_.boundary()[patchI].magSf()*dt);
        for (objective& func : functions)
        {
            const scalar wei(func.weight());
            dSfdbMult_()[patchI] += wei*func.dSdbMultiplier(patchI)*dt;
            dnfdbMult_()[patchI] += wei*func.dndbMultiplier(patchI)*magSfDt;
            dxdbDirectMult_()[patchI] +=
                wei*func.dxdbDirectMultiplier(patchI)*magSfDt;
        }
    }
}
 
 
void shapeSensitivities::accumulateBCSensitivityIntegrand(const scalar dt)
{
    // Avoid updating the event number to keep consistency with cases caching
    // gradUa
    auto& UaBoundary = adjointVars_.Ua().boundaryFieldRef(false);
    tmp<boundaryVectorField> DvDbMult(dvdbMult());
 
    // Accumulate sensitivities due to boundary conditions
    for (const label patchI : sensitivityPatchIDs_)
    {
        const scalarField magSfDt(mesh_.boundary()[patchI].magSf()*dt);
        fvPatchVectorField& Uab = UaBoundary[patchI];
        if (isA<adjointVectorBoundaryCondition>(Uab))
        {
            bcDxDbMult_()[patchI] +=
            (
                DvDbMult()[patchI]
              & refCast<adjointVectorBoundaryCondition>(Uab).dxdbMult()
            )*magSfDt;
        }
    }
}
 
 
tmp<boundaryVectorField> shapeSensitivities::dvdbMult() const
{
    tmp<boundaryVectorField>
        tres(createZeroBoundaryPtr<vector>(meshShape_).ptr());
    boundaryVectorField& res = tres.ref();
 
    // Grab references
    const volScalarField& pa = adjointVars_.pa();
    const volVectorField& Ua = adjointVars_.Ua();
    const autoPtr<incompressibleAdjoint::adjointRASModel>& adjointTurbulence =
        adjointVars_.adjointTurbulence();
 
    // Fields needed to calculate adjoint sensitivities
    const autoPtr<incompressible::RASModelVariables>&
       turbVars = primalVars_.RASModelVariables();
    const singlePhaseTransportModel& lamTransp = primalVars_.laminarTransport();
    volScalarField nuEff(lamTransp.nu() + turbVars->nutRef());
    tmp<volTensorField> tgradUa = fvc::grad(Ua);
    const volTensorField::Boundary& gradUabf = tgradUa.cref().boundaryField();
 
    for (const label patchI : sensitivityPatchIDs_)
    {
        const fvPatch& patch = meshShape_.boundary()[patchI];
        tmp<vectorField> tnf = patch.nf();
        const vectorField& nf = tnf();
 
        res[patchI] =
            (
                nuEff.boundaryField()[patchI]
              * (
                    Ua.boundaryField()[patchI].snGrad()
                  + (gradUabf[patchI] & nf)
                )
            )
          - (nf*pa.boundaryField()[patchI])
          + adjointTurbulence().adjointMomentumBCSource()[patchI];
    }
 
    return tres;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
shapeSensitivities::shapeSensitivities
(
    const fvMesh& mesh,
    const dictionary& dict,
    incompressibleAdjointSolver& adjointSolver
)
:
    adjointSensitivity(mesh, dict, adjointSolver),
    shapeSensitivitiesBase(mesh, dict),
    dSfdbMult_(createZeroBoundaryPtr<vector>(mesh_)),
    dnfdbMult_(createZeroBoundaryPtr<vector>(mesh_)),
    dxdbDirectMult_(createZeroBoundaryPtr<vector>(mesh_)),
    bcDxDbMult_(createZeroBoundaryPtr<vector>(mesh_))
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void shapeSensitivities::clearSensitivities()
{
    dSfdbMult_() = vector::zero;
    dnfdbMult_() = vector::zero;
    dxdbDirectMult_() = vector::zero;
    bcDxDbMult_() = vector::zero;
 
    adjointSensitivity::clearSensitivities();
    shapeSensitivitiesBase::clearSensitivities();
}
 
 
void shapeSensitivities::write(const word& baseName)
{
    adjointSensitivity::write(baseName);
    shapeSensitivitiesBase::write();
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace incompressible
} // End namespace Foam
 
// ************************************************************************* //