axisRotationMotion.C

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License
    This file is part of OpenFOAM.
 
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#include "axisRotationMotion.H"
#include "addToRunTimeSelectionTable.H"
 
using namespace Foam::constant::mathematical;
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace solidBodyMotionFunctions
{
    defineTypeNameAndDebug(axisRotationMotion, 0);
    addToRunTimeSelectionTable
    (
        solidBodyMotionFunction,
        axisRotationMotion,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::solidBodyMotionFunctions::axisRotationMotion::axisRotationMotion
(
    const word& name,
    const dictionary& SBMFCoeffs,
    const Time& runTime
)
:
    solidBodyMotionFunction(name, SBMFCoeffs, runTime)
{
    read(SBMFCoeffs);
}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::solidBodyMotionFunctions::axisRotationMotion::~axisRotationMotion()
{}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
Foam::septernion
Foam::solidBodyMotionFunctions::axisRotationMotion::transformation() const
{
    const scalar t = time_.value() - time_.beginTime().value();
 
    if (t > small)
    {
        const vector theta(t*omega_);
        const scalar magTheta = mag(theta);
        const quaternion R(theta/magTheta, magTheta);
        const septernion TR(septernion(-origin_)*R*septernion(origin_));
 
        DebugInFunction << "Time = " << t << " transformation: " << TR << endl;
 
        return TR;
    }
    else
    {
        return septernion::I;
    }
}
 
 
bool Foam::solidBodyMotionFunctions::axisRotationMotion::read
(
    const dictionary& SBMFCoeffs
)
{
    solidBodyMotionFunction::read(SBMFCoeffs);
 
    origin_ = SBMFCoeffs_.lookup<vector>("origin", dimLength);
    omega_ = SBMFCoeffs_.lookup<vector>("omega", units::radians/dimTime);
 
    return true;
}
 
 
// ************************************************************************* //