rigidBodyForces.H

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License
    This file is part of OpenFOAM.
 
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    the Free Software Foundation, either version 3 of the License, or
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    You should have received a copy of the GNU General Public License
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Class
    Foam::functionObjects::rigidBodyForces
 
Description
    Calculates the forces and moments by integrating the pressure and
    skin-friction forces over a given list of patches of a moving rigid body.
 
    The centre of rotation (CofR) of the moving rigid object is obtained
    directly from the corresponding Foam::RBD::rigidBodyMotion of the
    specified body.
 
    Member function rigidBodyForces::write() calculates the forces/moments and
    writes the forces/moments into the file <timeDir>/rigidBodyForces.dat
    and bin data (if selected) to the file <timeDir>/rigidBodyForces_bin.dat
 
    Example of function object specification:
    \verbatim
    rigidBodyForces1
    {
        type        rigidBodyForces;
        libs        ("librigidBodyForces.so");
 
        body        hull;
        patches     (walls);
 
        log         yes;
    }
    \endverbatim
 
Usage
    \table
        Property     | Description             | Required    | Default value
        type         | Type name: rigidBodyForces       | yes         |
        log          | Write force data to standard output | no | no
        body         | Name of the rigid body  | yes |
        patches      | Patches included in the forces calculation | yes |
        p            | Pressure field name     | no          | p
        U            | Velocity field name     | no          | U
        rho          | Density field name (see below) | no   | rho
        phase        | Phase name for phase-fraction  | no   |
        directForceDensity | Force density supplied directly (see below)|no|no
        fD           | Name of force density field (see below) | no | fD
    \endtable
 
    Bin data is optional, but if the dictionary is present, the entries must
    be defined according o
    \table
        nBin         | number of data bins     | yes         |
        direction    | direction along which bins are defined | yes |
        cumulative   | bin data accumulated with increasing distance | yes |
    \endtable
 
  Note
    - For incompressible cases, set \c rho to \c rhoInf and provide
      a \c rhoInf value corresponding to the free-stream constant density.
    - If the \c phase name is specified the corresponding phase-fraction field
      \c alpha.<phase> is used to filter the surface force field
      before integration.
    - If the force density is supplied directly, set the \c directForceDensity
      flag to 'yes', and supply the force density field using the \c
      fDName entry
 
See also
    Foam::functionObject
    Foam::functionObjects::forcesBase
    Foam::functionObjects::fvMeshFunctionObject
    Foam::functionObjects::logFiles
    Foam::functionObjects::timeControl
    Foam::RBD::rigidBodyMotion
 
SourceFiles
    rigidBodyForces.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef functionObjects_rigidBodyForces_H
#define functionObjects_rigidBodyForces_H
 
#include "forcesBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                           Class rigidBodyForces Declaration
\*---------------------------------------------------------------------------*/
 
class rigidBodyForces
:
    public forcesBase
{
    // Private Data
 
        //- Name of the rigid body
        word body_;
 
 
protected:
 
    // Protected Member Functions
 
        //- Return the current centre of the rigid body
        virtual vector CofR() const;
 
 
public:
 
    //- Runtime type information
    TypeName("rigidBodyForces");
 
 
    // Constructors
 
        //- Construct from Time and dictionary
        rigidBodyForces
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
        //- Construct from objectRegistry and dictionary
        rigidBodyForces
        (
            const word& name,
            const objectRegistry& obr,
            const dictionary&
        );
 
        //- Disallow default bitwise copy construction
        rigidBodyForces(const rigidBodyForces&) = delete;
 
 
    //- Destructor
    virtual ~rigidBodyForces();
 
 
    // Member Functions
 
        //- Read the forces data
        virtual bool read(const dictionary&);
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const rigidBodyForces&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //