interpolatingSolidBodyMotionSolver.C

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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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#include "interpolatingSolidBodyMotionSolver.H"
#include "addToRunTimeSelectionTable.H"
#include "pointPatchDist.H"
#include "pointConstraints.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    defineTypeNameAndDebug(interpolatingSolidBodyMotionSolver, 0);
 
    addToRunTimeSelectionTable
    (
        motionSolver,
        interpolatingSolidBodyMotionSolver,
        dictionary
    );
}
 
 
// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
 
void Foam::interpolatingSolidBodyMotionSolver::calcScale()
{
    const pointMesh& pMesh = pointMesh::New(mesh());
 
    pointPatchDist pDist(pMesh, patchSet_, points0());
 
    // Scaling: 1 up to di then linear down to 0 at do away from patches
    scale_.primitiveFieldRef() =
        min
        (
            max
            (
                (do_ - pDist.primitiveField())/(do_ - di_),
                scalar(0)
            ),
            scalar(1)
        );
 
    // Convert the scale function to a cosine
    scale_.primitiveFieldRef() =
        min
        (
            max
            (
                0.5
              - 0.5
               *cos(scale_.primitiveField()
               *Foam::constant::mathematical::pi),
                scalar(0)
            ),
            scalar(1)
        );
 
    pointConstraints::New(pMesh).constrain(scale_);
    scale_.write();
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::interpolatingSolidBodyMotionSolver::interpolatingSolidBodyMotionSolver
(
    const word& name,
    const polyMesh& mesh,
    const dictionary& dict
)
:
    points0MotionSolver(name, mesh, dict, typeName),
    SBMFPtr_(solidBodyMotionFunction::New(coeffDict(), mesh.time())),
    patches_(wordReList(coeffDict().lookup("patches"))),
    patchSet_(mesh.boundaryMesh().patchSet(patches_)),
    CofG_(coeffDict().lookup("CofG")),
    di_(coeffDict().lookup<scalar>("innerDistance")),
    do_(coeffDict().lookup<scalar>("outerDistance")),
    scale_
    (
        IOobject
        (
            "motionScale",
            mesh.time().name(),
            mesh,
            IOobject::NO_READ,
            IOobject::NO_WRITE
        ),
        pointMesh::New(mesh),
        dimensionedScalar(dimless, 0)
    )
{
    // Calculate scaling factor everywhere
    calcScale();
}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::interpolatingSolidBodyMotionSolver::~interpolatingSolidBodyMotionSolver()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::pointField>
Foam::interpolatingSolidBodyMotionSolver::curPoints() const
{
    const pointField& points0 = this->points0();
    const septernion s = SBMFPtr_().transformation();
 
    tmp<pointField> tpoints(new pointField(points0));
    pointField& points = tpoints.ref();
 
    forAll(points, pointi)
    {
        // Move non-stationary points
        if (scale_[pointi] > small)
        {
            // Use solid-body motion where scale = 1
            if (scale_[pointi] > 1 - small)
            {
                points[pointi] =
                    CofG_ + s.transformPoint(points0[pointi] - CofG_);
            }
            // Slerp septernion interpolation
            else
            {
                const septernion ss(slerp(septernion::I, s, scale_[pointi]));
 
                points[pointi] =
                    CofG_ + ss.transformPoint(points0[pointi] - CofG_);
            }
        }
    }
 
    return tpoints;
}
 
 
void Foam::interpolatingSolidBodyMotionSolver::topoChange
(
    const polyTopoChangeMap& map
)
{
    // Pending implementation of the inverse transformation of points0
    NotImplemented;
}
 
 
void Foam::interpolatingSolidBodyMotionSolver::mapMesh(const polyMeshMap& map)
{
    points0MotionSolver::mapMesh(map);
 
    // scale is resized by the meshToMesh mapper
    scale_ = Zero;
    calcScale();
}
 
 
// ************************************************************************* //