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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2018-2025 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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 turbulenceIntensity_functionObject_H
#define turbulenceIntensity_functionObject_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
// ************************************************************************* //
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