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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 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::Lagrangian::diskInjection
Description
Disk injection model. This injects particles continuously over a disk with
a given number rate. The disk is characterised by a centre, and axis and an
inner and an outer diameter. The centre and axis and number rate are all
Function1-s and can vary with time.
Note that this model only controls the number and position of injected
Lagrangian particles. All physical properties are specified by
corresponding source conditions. So the velocity/direction/angle/etc..., is
controlled by the velocity source condition, the size distribution by the
diameter source condition, and the flow rate by the number source
condition.
Usage
\table
Property | Description | Required? | Default
centre | The centre of the disk | yes |
axis | The axis normal to the disk | yes |
diameter | The diameter of the circle | if innerDiameter \
and outerDiameter \
are not specified |
innerDiameter | The inner diameter of the annulus | if diameter is not \
specified |
outerDiameter | The outer diameter of the annulus | if diameter is not \
specified |
numberRate | The number of particles to \
inject per unit time | yes |
\endtable
Example specification:
\verbatim
<LagrangianModelName>
{
type pointInjection;
point (1 2 3) [cm];
numberRate 10000;
}
\endverbatim
See also
Foam::Function1s
SourceFiles
diskInjection.C
\*---------------------------------------------------------------------------*/
#ifndef diskInjection_H
#define diskInjection_H
#include "LagrangianInjection.H"
#include "Function1.H"
#include "restartableRandomGenerator.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace Lagrangian
{
/*---------------------------------------------------------------------------*\
Class diskInjection Declaration
\*---------------------------------------------------------------------------*/
class diskInjection
:
public LagrangianInjection
{
private:
// Private Data
//- The centre of the disk
autoPtr<Function1<point>> centre_;
//- The axis of the disk
autoPtr<Function1<vector>> axis_;
//- The inner diameter
scalar innerDiameter_;
//- The outer diameter
scalar outerDiameter_;
//- The rate at which to inject
autoPtr<Function1<scalar>> numberRate_;
//- The number deferred to the next injection step
mutable scalar numberDeferred_;
//- A random number generator
mutable restartableRandomGenerator rndGen_;
//- The time index
mutable label timeIndex_;
//- Cached axes
mutable autoPtr<LagrangianSubVectorField> axisPtr_;
//- Cached radius fractions
mutable autoPtr<LagrangianSubScalarField> rFracPtr_;
//- Cached radial vectors
mutable autoPtr<LagrangianSubVectorField> radialPtr_;
// Private Member Functions
//- Non-virtual read
void readCoeffs(const dictionary& modelDict);
public:
//- Runtime type information
TypeName("diskInjection");
// Constructors
//- Construct from components
diskInjection
(
const word& name,
const LagrangianMesh& mesh,
const dictionary& modelDict,
const dictionary& stateDict
);
// Member Functions
// Access
//- Return the area of the disk
const dimensionedScalar area() const;
//- Access the cached axes. Only valid during injection.
const LagrangianSubVectorField& axis() const;
//- Access the cached radius fractions. Only valid during injection.
const LagrangianSubScalarField& rFrac() const;
//- Access the cached radial vectors. Only valid during injection.
const LagrangianSubVectorField& radial() const;
//- Create new elements in the Lagrangian mesh
LagrangianSubMesh modify
(
LagrangianMesh& mesh,
const LagrangianSubMesh&
) const;
// IO
//- Read dictionary
virtual bool read(const dictionary& modelDict);
//- Write state
virtual void writeState(Ostream& os) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Lagrangian
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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