displacementComponentLaplacianFvMotionSolver.C

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     \\/     M anipulation  |
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    Copyright (C) 2016-2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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#include "displacementComponentLaplacianFvMotionSolver.H"
#include "motionInterpolation.H"
#include "motionDiffusivity.H"
#include "fvmLaplacian.H"
#include "addToRunTimeSelectionTable.H"
#include "mapPolyMesh.H"
#include "fvOptions.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    defineTypeNameAndDebug(displacementComponentLaplacianFvMotionSolver, 0);

    addToRunTimeSelectionTable
    (
        motionSolver,
        displacementComponentLaplacianFvMotionSolver,
        dictionary
    );
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::displacementComponentLaplacianFvMotionSolver::
displacementComponentLaplacianFvMotionSolver
(
    const polyMesh& mesh,
    const IOdictionary& dict
)
:
    componentDisplacementMotionSolver(mesh, dict, type()),
    fvMotionSolver(mesh),
    cellDisplacement_
    (
        IOobject
        (
            "cellDisplacement" + cmptName_,
            mesh.time().timeName(),
            mesh,
            IOobject::READ_IF_PRESENT,
            IOobject::AUTO_WRITE
        ),
        fvMesh_,
        dimensionedScalar(pointDisplacement_.dimensions(), Zero),
        cellMotionBoundaryTypes<scalar>(pointDisplacement_.boundaryField())
    ),
    pointLocation_(nullptr),
    interpolationPtr_
    (
        coeffDict().found("interpolation")
      ? motionInterpolation::New(fvMesh_, coeffDict().lookup("interpolation"))
      : motionInterpolation::New(fvMesh_)
    ),
    diffusivityPtr_
    (
        motionDiffusivity::New(fvMesh_, coeffDict().lookup("diffusivity"))
    ),
    frozenPointsZone_
    (
        coeffDict().found("frozenPointsZone")
      ? fvMesh_.pointZones().findZoneID
        (
            coeffDict().get<word>("frozenPointsZone")
        )
      : -1
    )
{
    if (coeffDict().getOrDefault("applyPointLocation", true))
    {
        pointLocation_.reset
        (
            new pointVectorField
            (
                IOobject
                (
                    "pointLocation",
                    fvMesh_.time().timeName(),
                    fvMesh_,
                    IOobject::MUST_READ,
                    IOobject::AUTO_WRITE
                ),
                pointMesh::New(fvMesh_)
            )
        );

        //if (debug)
        {
            Info<< "displacementComponentLaplacianFvMotionSolver :"
                << " Read pointVectorField "
                << pointLocation_().name()
                << " to be used for boundary conditions on points."
                << nl
                << "Boundary conditions:"
                << pointLocation_().boundaryField().types() << endl;
        }
    }
}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::displacementComponentLaplacianFvMotionSolver::
~displacementComponentLaplacianFvMotionSolver()
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

Foam::tmp<Foam::pointField>
Foam::displacementComponentLaplacianFvMotionSolver::curPoints() const
{
    interpolationPtr_->interpolate
    (
        cellDisplacement_,
        pointDisplacement_
    );

    if (pointLocation_)
    {
        if (debug)
        {
            Info<< "displacementComponentLaplacianFvMotionSolver : applying "
                << " boundary conditions on " << pointLocation_().name()
                << " to new point location."
                << endl;
        }

        // Apply pointLocation_ b.c. to mesh points.

        pointLocation_().primitiveFieldRef() = fvMesh_.points();

        pointLocation_().primitiveFieldRef().replace
        (
            cmpt_,
            points0_ + pointDisplacement_.primitiveField()
        );

        pointLocation_().correctBoundaryConditions();

        // Implement frozen points
        if (frozenPointsZone_ != -1)
        {
            const pointZone& pz = fvMesh_.pointZones()[frozenPointsZone_];

            forAll(pz, i)
            {
                label pointi = pz[i];

                pointLocation_()[pointi][cmpt_] = points0_[pointi];
            }
        }

        twoDCorrectPoints(pointLocation_().primitiveFieldRef());

        return tmp<pointField>(pointLocation_().primitiveField());
    }
    else
    {
        tmp<pointField> tcurPoints(new pointField(fvMesh_.points()));
        pointField& curPoints = tcurPoints.ref();

        curPoints.replace
        (
            cmpt_,
            points0_ + pointDisplacement_.primitiveField()
        );

        // Implement frozen points
        if (frozenPointsZone_ != -1)
        {
            const pointZone& pz = fvMesh_.pointZones()[frozenPointsZone_];

            forAll(pz, i)
            {
                label pointi = pz[i];

                curPoints[pointi][cmpt_] = points0_[pointi];
            }
        }

        twoDCorrectPoints(curPoints);

        return tcurPoints;
    }
}


void Foam::displacementComponentLaplacianFvMotionSolver::solve()
{
    // The points have moved so before interpolation update
    // the motionSolver accordingly
    movePoints(fvMesh_.points());

    diffusivityPtr_->correct();
    pointDisplacement_.boundaryFieldRef().updateCoeffs();

    fv::options& fvOptions(fv::options::New(fvMesh_));

    // We explicitly do NOT want to interpolate the motion inbetween
    // different regions so bypass all the matrix manipulation.
    fvScalarMatrix TEqn
    (
        fvm::laplacian
        (
            dimensionedScalar("viscosity", dimViscosity, 1.0)
           *diffusivityPtr_->operator()(),
            cellDisplacement_,
            "laplacian(diffusivity,cellDisplacement)"
        )
     ==
        fvOptions(cellDisplacement_)
    );

    fvOptions.constrain(TEqn);
    TEqn.solveSegregatedOrCoupled();
    fvOptions.correct(cellDisplacement_);
}


void Foam::displacementComponentLaplacianFvMotionSolver::updateMesh
(
    const mapPolyMesh& mpm
)
{
    componentDisplacementMotionSolver::updateMesh(mpm);

    // Update diffusivity. Note two stage to make sure old one is de-registered
    // before creating/registering new one.
    diffusivityPtr_.reset(nullptr);
    diffusivityPtr_ = motionDiffusivity::New
    (
        fvMesh_,
        coeffDict().lookup("diffusivity")
    );
}


// ************************************************************************* //