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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2024-2025 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::power
Description
Evaluates and writes the following power fields.
\verbatim
+ tauUSf: tauf & Uf
+ divTauU: fvc::div(tauUSf)
+ divTauDotU: fvc::div(tauf) & U
+ tauDDotGradU: divTauU - divTauDotU
+ pUSf: -pIf & Uf
+ divPU: fvc::div(pUSf)
+ gradPU: -fvc::grad(p) & U
+ pDivU: divPU - gradPU
+ stressUSf: tauUSf + pUSf
+ divStressU: fvc::div(stressUSf)
+ divStressDotU: fvc::div(stressf) & U
+ stressDDotGradU: divStressU - divStressDotU
\endverbatim
where:
\verbatim
+ p, U = cell centre pressure and velocity
+ pIf, Uf = face normal pressure force, and velocity, vectors
+ tauf = face shear force vectors [-transport.devTau()*mesh().magSf()]
+ stressf = tauf - pIf
\endverbatim
The domain integral of the volume fields (all except '...Sf' fields) is also
printed to a log file in the postProcessing directory. Domain integrals are
scaled by a factor, which defaults to 1e9, to make them easier to process.
Usage
An example is given below of a function object specification in the
system/functions file with a scaling factor of 1e6 for the domain integrals
\verbatim
power
{
type power;
libs ("libfieldFunctionObjects.so");
executeControl writeTime;
writeControl writeTime;
log true;
factor 1e6;
}
\endverbatim
Alternatively it can be specified using the standard 'power' function object
configuration file as follows
\verbatim
#includeFunc power(factor=1e6)
\endverbatim
See also
Foam::functionObject
Foam::functionObjects::fvMeshFunctionObject
Foam::functionObjects::logFiles
Foam::functionObjects::writeLocalObjects
Foam::functionObjects::timeControl
SourceFiles
power.C
\*---------------------------------------------------------------------------*/
#ifndef power_functionObject_H
#define power_functionObject_H
#include "fvMeshFunctionObject.H"
#include "logFiles.H"
#include "writeLocalObjects.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace functionObjects
{
/*---------------------------------------------------------------------------*\
Class power Declaration
\*---------------------------------------------------------------------------*/
class power
:
public fvMeshFunctionObject,
public logFiles,
public writeLocalObjects
{
// Private Static data
//- List of the power field names
static const wordList fields_;
// Private Member data
//- Scaling factor for the power output (defaults to 1e9)
scalar factor_;
// Private Member Functions
//- File header information
virtual void writeFileHeader(const label i);
public:
//- Runtime type information
TypeName("power");
// Constructors
//- Construct from Time and dictionary
power
(
const word& name,
const Time& runTime,
const dictionary& dict
);
//- Disallow default bitwise copy construction
power(const power&) = delete;
//- Destructor
virtual ~power();
// Member Functions
//- Read the power data
virtual bool read(const dictionary&);
//- Return the list of fields required
virtual wordList fields() const
{
return wordList::null();
}
//- Calculate the power field
virtual bool execute();
//- Write the power field
virtual bool write();
// Member Operators
//- Disallow default bitwise assignment
void operator=(const power&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace functionObjects
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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