velocityLaplacianFvMotionSolver.C

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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 "velocityLaplacianFvMotionSolver.H"
#include "motionInterpolation.H"
#include "motionDiffusivity.H"
#include "fvmLaplacian.H"
#include "addToRunTimeSelectionTable.H"
#include "fvOptions.H"

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

namespace Foam
{
    defineTypeNameAndDebug(velocityLaplacianFvMotionSolver, 0);

    addToRunTimeSelectionTable
    (
        motionSolver,
        velocityLaplacianFvMotionSolver,
        dictionary
    );
}


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

Foam::velocityLaplacianFvMotionSolver::velocityLaplacianFvMotionSolver
(
    const polyMesh& mesh,
    const IOdictionary& dict
)
:
    velocityMotionSolver(mesh, dict, typeName),
    fvMotionSolver(mesh),
    cellMotionU_
    (
        IOobject
        (
            "cellMotionU",
            mesh.time().timeName(),
            mesh,
            IOobject::READ_IF_PRESENT,
            IOobject::AUTO_WRITE
        ),
        fvMesh_,
        dimensionedVector(pointMotionU_.dimensions(), Zero),
        cellMotionBoundaryTypes<vector>(pointMotionU_.boundaryField())
    ),
    interpolationPtr_
    (
        coeffDict().found("interpolation")
      ? motionInterpolation::New(fvMesh_, coeffDict().lookup("interpolation"))
      : motionInterpolation::New(fvMesh_)
    ),
    diffusivityPtr_
    (
        motionDiffusivity::New(fvMesh_, coeffDict().lookup("diffusivity"))
    )
{}


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

Foam::velocityLaplacianFvMotionSolver::~velocityLaplacianFvMotionSolver()
{}


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

Foam::tmp<Foam::pointField>
Foam::velocityLaplacianFvMotionSolver::curPoints() const
{
    interpolationPtr_->interpolate
    (
        cellMotionU_,
        pointMotionU_
    );

    tmp<pointField> tcurPoints
    (
        fvMesh_.points()
      + fvMesh_.time().deltaTValue()*pointMotionU_.primitiveField()
    );

    twoDCorrectPoints(tcurPoints.ref());

    return tcurPoints;
}


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

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

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

    const label nNonOrthCorr
    (
        getOrDefault<label>("nNonOrthogonalCorrectors", 1)
    );

    for (label i=0; i<nNonOrthCorr; ++i)
    {
        fvVectorMatrix UEqn
        (
            fvm::laplacian
            (
                dimensionedScalar("viscosity", dimViscosity, 1.0)
              * diffusivityPtr_->operator()(),
                cellMotionU_,
                "laplacian(diffusivity,cellMotionU)"
            )
         ==
            fvOptions(cellMotionU_)
        );

        fvOptions.constrain(UEqn);
        UEqn.solveSegregatedOrCoupled();
        fvOptions.correct(cellMotionU_);
    }
}


void Foam::velocityLaplacianFvMotionSolver::updateMesh
(
    const mapPolyMesh& mpm
)
{
    velocityMotionSolver::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")
    );
}


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