turbulenceIntensity.H

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/*---------------------------------------------------------------------------*\
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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
    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::functionObjects::turbulenceIntensity
 
Description
    Evaluates and writes the turbulence intensity field 'I'.
 
    The turbulence intensity field 'I' is the root-mean-square of the turbulent
    velocity fluctuations normalised by the local velocity magnitude:
    \f[
        I \equiv \frac{\sqrt{\frac{2}{3}\, k}}{U}
    \f]
    To avoid spurious extrema and division by 0 I is limited to 1 where the
    velocity magnitude is less than the turbulent velocity fluctuations.
 
    Example of function object specification:
    \verbatim
    functions
    {
        .
        .
        .
        turbulenceIntensity
        {
            type        turbulenceIntensity;
            libs        ("libfieldFunctionObjects.so");
        }
        .
        .
        .
    }
    \endverbatim
 
    or using the standard configuration file:
    \verbatim
    functions
    {
        .
        .
        .
        #includeFunc turbulenceIntensity
        .
        .
        .
    }
    \endverbatim
 
See also
    Foam::functionObject
    Foam::functionObjects::fvMeshFunctionObject
    Foam::functionObjects::logFiles
    Foam::functionObjects::writeLocalObjects
    Foam::functionObjects::timeControl
 
SourceFiles
    turbulenceIntensity.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef functionObjects_turbulenceIntensity_H
#define functionObjects_turbulenceIntensity_H
 
#include "fvMeshFunctionObject.H"
#include "logFiles.H"
#include "writeLocalObjects.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                     Class turbulenceIntensity Declaration
\*---------------------------------------------------------------------------*/
 
class turbulenceIntensity
:
    public fvMeshFunctionObject,
    public logFiles,
    public writeLocalObjects
{
    // Private Member Functions
 
        //- File header information
        virtual void writeFileHeader(const label i);
 
 
public:
 
    //- Runtime type information
    TypeName("turbulenceIntensity");
 
 
    // Constructors
 
        //- Construct from Time and dictionary
        turbulenceIntensity
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
        //- Disallow default bitwise copy construction
        turbulenceIntensity(const turbulenceIntensity&) = delete;
 
 
    //- Destructor
    virtual ~turbulenceIntensity();
 
 
    // Member Functions
 
        //- Read the turbulenceIntensity data
        virtual bool read(const dictionary&);
 
        //- Return the list of fields required
        virtual wordList fields() const
        {
            return wordList::null();
        }
 
        //- Calculate the turbulenceIntensity field
        virtual bool execute();
 
        //- Write the turbulenceIntensity field
        virtual bool write();
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const turbulenceIntensity&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //