externalForce.H

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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.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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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::restraints::externalForce
 
Description
    Time-dependent external force restraint using Function1.
 
Usage
    Example applying a constant force to the floatingObject:
    \verbatim
    restraints
    {
        force
        {
            type        externalForce;
            body        floatingObject;
            location    (0 0 0);
            force       (100 0 0);
        }
    }
    \endverbatim
 
SourceFiles
    externalForce.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef RBD_restraints_externalForce_H
#define RBD_restraints_externalForce_H
 
#include "rigidBodyRestraint.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RBD
{
namespace restraints
{
 
/*---------------------------------------------------------------------------*\
                        Class externalForce Declaration
\*---------------------------------------------------------------------------*/
 
class externalForce
:
    public restraint
{
    // Private data
 
        //- External force (N)
        autoPtr<Function1<vector>> externalForce_;
 
        //- Point of application of the force
        vector location_;
 
 
public:
 
    //- Runtime type information
    TypeName("externalForce");
 
 
    // Constructors
 
        //- Construct from components
        externalForce
        (
            const word& name,
            const dictionary& dict,
            const rigidBodyModel& model
        );
 
        //- Construct and return a clone
        virtual autoPtr<restraint> clone() const
        {
            return autoPtr<restraint>
            (
                new externalForce(*this)
            );
        }
 
 
    //- Destructor
    virtual ~externalForce();
 
 
    // Member Functions
 
        //- Accumulate the retraint internal joint forces into the tau field and
        //  external forces into the fx field
        virtual void restrain
        (
            scalarField& tau,
            Field<spatialVector>& fx,
            const rigidBodyModelState& state
        ) const;
 
        //- Update properties from given dictionary
        virtual bool read(const dictionary& dict);
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace restraints
} // End namespace RBD
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //