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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2025 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::fv::actuationDisk
Description
Actuation disk source
Constant values for momentum source for actuation disk
\f[
T = 2 \rho A (\hat{d}\dot U_{o})^2 a (1-a) \hat{d}
\f]
where:
\vartable
A | Disk area
dHat | Unit disk direction
U_o | Upstream velocity
a | 1 - Cp/Ct
Cp | Power coefficient
Ct | Thrust coefficient
\endvartable
Usage
Example usage:
\verbatim
actuationDisk1
{
type actuationDisk;
cellZone actuationDisk1;
diskDir (-1 0 0); // Disk direction
Cp 0.1; // Power coefficient
Ct 0.5; // Thrust coefficient
diskArea 5.0; // Disk area
upstreamPoint (0 0 0); // Upstream point
}
\endverbatim
SourceFiles
actuationDisk.C
actuationDiskTemplates.C
\*---------------------------------------------------------------------------*/
#ifndef actuationDisk_H
#define actuationDisk_H
#include "fvModel.H"
#include "fvCellZone.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace fv
{
/*---------------------------------------------------------------------------*\
Class actuationDisk Declaration
\*---------------------------------------------------------------------------*/
class actuationDisk
:
public fvModel
{
protected:
// Protected Data
//- The cellZone the fvConstraint applies to
fvCellZone zone_;
//- The name of the phase to which this fvModel applies
word phaseName_;
//- Name of the velocity field
word UName_;
//- Disk area normal
vector diskDir_;
//- Power coefficient
scalar Cp_;
//- Thrust coefficient
scalar Ct_;
//- Disk area
scalar diskArea_;
//- Upstream point sample
point upstreamPoint_;
//- Upstream cell ID
label upstreamCellId_;
private:
// Private Member Functions
//- Non-virtual read
void readCoeffs(const dictionary& dict);
//- Add resistance to the UEqn
template<class AlphaFieldType, class RhoFieldType>
inline void addActuationDiskAxialInertialResistance
(
vectorField& Usource,
const labelList& cells,
const scalarField& V,
const AlphaFieldType& alpha,
const RhoFieldType& rho,
const vectorField& U
) const;
public:
//- Runtime type information
TypeName("actuationDisk");
// Constructors
//- Construct from components
actuationDisk
(
const word& name,
const word& modelType,
const fvMesh& mesh,
const dictionary& dict
);
//- Disallow default bitwise copy construction
actuationDisk(const actuationDisk&) = delete;
//- Destructor
virtual ~actuationDisk()
{}
// Member Functions
// Checks
//- Return the list of fields for which the fvModel adds source term
// to the transport equation
virtual wordList addSupFields() const;
// Add explicit and implicit contributions
//- Source term to momentum equation
virtual void addSup
(
const volVectorField& U,
fvMatrix<vector>& eqn
) const;
//- Source term to compressible momentum equation
virtual void addSup
(
const volScalarField& rho,
const volVectorField& U,
fvMatrix<vector>& eqn
) const;
//- Explicit and implicit sources for phase equations
virtual void addSup
(
const volScalarField& alpha,
const volScalarField& rho,
const volVectorField& U,
fvMatrix<vector>& eqn
) const;
// Mesh changes
//- Update for mesh motion
virtual bool movePoints();
//- Update topology using the given map
virtual void topoChange(const polyTopoChangeMap&);
//- Update from another mesh using the given map
virtual void mapMesh(const polyMeshMap&);
//- Redistribute or update using the given distribution map
virtual void distribute(const polyDistributionMap&);
// IO
//- Read dictionary
virtual bool read(const dictionary& dict);
// Member Operators
//- Disallow default bitwise assignment
void operator=(const actuationDisk&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace fv
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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