forceCoeffs.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::functionObjects::forceCoeffs
 
Description
    Extends the forces functionObject by providing lift, drag and moment
    coefficients.  The data can optionally be output into bins, defined in a
    given direction.
 
    Example of function object specification:
    \verbatim
    forceCoeffs1
    {
        type        forceCoeffs;
        libs        ("libforces.so");
        ...
        log         yes;
        patches     (walls);
        liftDir     (0 1 0);
        dragDir     (-1 0 0);
        pitchAxis   (0 0 1);
        magUInf     100;
        lRef        3.5;
        Aref        2.2;
 
        binData
        {
            nBin        20;
            direction   (1 0 0);
            cumulative  yes;
        }
    }
    \endverbatim
 
Usage
    \table
        Property     | Description             | Required    | Default value
        type         | type name: forceCoeffs  | yes         |
        log          | write force data to standard output | no | no
        patches      | patches included in the forces calculation | yes |
        liftDir      | lift direction          | yes         |
        dragDir      | drag direction          | yes         |
        pitchAxis    | pitch axis              | yes         |
        magUInf      | free stream velocity magnitude | yes  |
        lRef         | reference length scale for moment calculations | yes |
        Aref         | reference area          | yes |
    \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
 
See also
    Foam::functionObject
    Foam::functionObjects::timeControl
    Foam::functionObjects::forces
 
SourceFiles
    forceCoeffs.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef functionObjects_forceCoeffs_H
#define functionObjects_forceCoeffs_H
 
#include "forces.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                         Class forceCoeffs Declaration
\*---------------------------------------------------------------------------*/
 
class forceCoeffs
:
    public forces
{
    // Private Data
 
        // Force coefficient geometry
 
            //- Lift
            vector liftDir_;
 
            //- Drag
            vector  dragDir_;
 
            //- Pitch
            vector pitchAxis_;
 
 
        // Free-stream conditions
 
            //- Velocity magnitude
            scalar magUInf_;
 
 
        // Reference scales
 
            //- Length
            scalar lRef_;
 
            //- Area
            scalar Aref_;
 
 
protected:
 
    //- Output file header information
    virtual void writeFileHeader(const label i);
 
 
public:
 
    //- Runtime type information
    TypeName("forceCoeffs");
 
 
    // Constructors
 
        //- Construct from Time and dictionary
        forceCoeffs
        (
            const word& name,
            const Time& runTime,
            const dictionary&
        );
 
        //- Disallow default bitwise copy construction
        forceCoeffs(const forceCoeffs&) = delete;
 
 
    //- Destructor
    virtual ~forceCoeffs();
 
 
    // Member Functions
 
        //- Read the forces data
        virtual bool read(const dictionary&);
 
        //- Execute, currently does nothing
        virtual bool execute();
 
        //- Write the forces
        virtual bool write();
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const forceCoeffs&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //