symplectic.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2015-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    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::sixDoFSolvers::symplectic
 
Group
    grpSixDoFRigidBodySolvers
 
Description
    Symplectic 2nd-order explicit time-integrator for 6DoF solid-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::sixDoFSolvers::CrankNicolson
    Foam::sixDoFSolvers::Newmark
 
SourceFiles
    symplectic.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef symplectic_H
#define symplectic_H
 
#include "sixDoFSolver.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace sixDoFSolvers
{
 
/*---------------------------------------------------------------------------*\
                           Class symplectic Declaration
\*---------------------------------------------------------------------------*/
 
class symplectic
:
    public sixDoFSolver
{
 
public:
 
    //- Runtime type information
    TypeName("symplectic");
 
 
    // Constructors
 
        //- Construct from a dictionary and the body
        symplectic
        (
            const dictionary& dict,
            sixDoFRigidBodyMotion& body
        );
 
        //- Construct and return a clone
        virtual autoPtr<sixDoFSolver> clone() const
        {
            return autoPtr<sixDoFSolver>::NewFrom<symplectic>(dict_, body_);
        }
 
 
    //- Destructor
    virtual ~symplectic();
 
 
    // Member Functions
 
        //- Drag coefficient
        virtual void solve
        (
            bool firstIter,
            const vector& fGlobal,
            const vector& tauGlobal,
            scalar deltaT,
            scalar deltaT0
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace sixDoFSolvers
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //