symplectic.H

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    Copyright (C) 2016 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::RBD::rigidBodySolvers::symplectic
 
Description
    Symplectic 2nd-order explicit time-integrator for rigid-body motion.
 
    Reference:
    \verbatim
        Dullweber, A., Leimkuhler, B., & McLachlan, R. (1997).
        Symplectic splitting methods for rigid body molecular dynamics.
        The Journal of chemical physics, 107(15), 5840-5851.
    \endverbatim
 
    Can only be used for explicit integration of the motion of the body,
    i.e. may only be called once per time-step, no outer-correctors may be
    applied.  For implicit integration with outer-correctors choose either
    CrankNicolson or Newmark schemes.
 
    Example specification in dynamicMeshDict:
    \verbatim
    solver
    {
        type    symplectic;
    }
    \endverbatim
 
See also
    Foam::RBD::rigidBodySolvers::CrankNicolson
    Foam::RBD::rigidBodySolvers::Newmark
 
SourceFiles
    symplectic.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef symplectic_H
#define symplectic_H
 
#include "rigidBodySolver.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RBD
{
namespace rigidBodySolvers
{
 
/*---------------------------------------------------------------------------*\
                           Class symplectic Declaration
\*---------------------------------------------------------------------------*/
 
class symplectic
:
    public rigidBodySolver
{
 
public:
 
    //- Runtime type information
    TypeName("symplectic");
 
 
    // Constructors
 
        //- Construct for the given body from dictionary
        symplectic
        (
            rigidBodyMotion& body,
            const dictionary& dict
        );
 
 
    //- Destructor
    virtual ~symplectic();
 
 
    // Member Functions
 
        //- Integrate the rigid-body motion for one time-step
        virtual void solve
        (
            const scalarField& tau,
            const Field<spatialVector>& fx
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace rigidBodySolvers
} // End namespace RBD
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //