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magneticFoam: New magnetic-field solver
Solver for the magnetic field generated by permanent magnets.
A Poisson's equation for the magnetic scalar potential psi is solved
from which the magnetic field intensity H and magnetic flux density B
are obtained.
This commit is contained in:
henry
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magneticFoam.C
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EXE = $(FOAM_APPBIN)/magneticFoam
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EXE_INC = \
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-I$(LIB_SRC)/finiteVolume/lnInclude
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EXE_LIBS = -lfiniteVolume
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Info<< "Reading field psi\n" << endl;
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volScalarField psi
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(
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IOobject
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(
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"psi",
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runTime.timeName(),
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mesh,
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IOobject::MUST_READ,
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IOobject::AUTO_WRITE
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),
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mesh
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);
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Info<< "Reading transportProperties\n" << endl;
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IOdictionary transportProperties
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(
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IOobject
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(
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"transportProperties",
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runTime.constant(),
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mesh,
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IOobject::MUST_READ,
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IOobject::NO_WRITE
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)
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);
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List<magnet> magnets(transportProperties.lookup("magnets"));
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surfaceScalarField murf
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(
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IOobject
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(
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"murf",
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runTime.timeName(),
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mesh
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),
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mesh,
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1
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);
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surfaceScalarField Mrf
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(
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IOobject
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(
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"Mrf",
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runTime.timeName(),
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mesh
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),
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mesh,
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dimensionedScalar("Mr", dimensionSet(0, 1, 0, 0, 0, 1, 0), 0)
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);
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forAll(magnets, i)
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{
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label magnetZonei = mesh.faceZones().findZoneID(magnets[i].name());
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if (magnetZonei == -1)
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{
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FatalIOErrorIn(args.executable().c_str(), transportProperties)
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<< "Cannot find faceZone for magnet " << magnets[i].name()
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<< exit(FatalIOError);
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}
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const labelList& faces =
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mesh.faceZones()[magnetZonei];
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const scalar muri = magnets[i].mur();
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const scalar Mri = magnets[i].Mr().value();
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const vector& orientationi = magnets[i].orientation();
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const surfaceVectorField& Sf = mesh.Sf();
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forAll(faces, i)
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{
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label facei = faces[i];
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murf[facei] = muri;
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Mrf[facei] = Mri*(orientationi & Sf[facei]);
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}
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}
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169
applications/solvers/electromagnetics/magneticFoam/magnet.H
Normal file
169
applications/solvers/electromagnetics/magneticFoam/magnet.H
Normal file
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2010-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::magnet
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Description
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Class to hold the defining data for a permanent magnet, in particular
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the name, relative permeability and remanence.
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SourceFiles
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\*---------------------------------------------------------------------------*/
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#ifndef magnet_H
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#define magnet_H
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#include "dimensionedVector.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// Forward declaration of classes
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class Istream;
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class Ostream;
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// Forward declaration of friend functions and operators
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class magnet;
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Istream& operator>>(Istream&, magnet&);
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Ostream& operator<<(Ostream&, const magnet&);
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/*---------------------------------------------------------------------------*\
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Class magnet Declaration
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\*---------------------------------------------------------------------------*/
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class magnet
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{
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// Private data
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word name_;
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scalar relativPermeability_;
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dimensionedScalar remanence_;
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vector orientation_;
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public:
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// Constructors
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//- Null constructor for lists
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inline magnet()
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:
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remanence_("Mr", dimensionSet(0, -1, 0, 0, 0, 1, 0), 0),
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orientation_(vector::zero)
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{}
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//- Construct from components
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inline magnet
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(
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const word& name,
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const scalar mur,
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const scalar Mr,
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const vector& orientation
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)
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:
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name_(name),
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relativPermeability_(mur),
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remanence_("Mr", dimensionSet(0, -1, 0, 0, 0, 1, 0), Mr),
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orientation_(orientation)
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{}
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//- Construct from Istream
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inline magnet(Istream& is)
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:
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remanence_("Mr", dimensionSet(0, -1, 0, 0, 0, 1, 0), 0),
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orientation_(vector::zero)
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{
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is >> *this;
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}
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// Member Functions
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//- Return name
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inline const word& name() const
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{
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return name_;
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}
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//- Return relative permeability
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inline scalar mur() const
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{
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return relativPermeability_;
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}
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//- Return remenance
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inline const dimensionedScalar& Mr() const
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{
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return remanence_;
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}
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//- Return orientation
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inline const vector& orientation() const
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{
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return orientation_;
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}
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// IOstream operators
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inline friend Istream& operator>>(Istream& is, magnet& m)
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{
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is.readBegin("magnet");
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is >> m.name_
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>> m.relativPermeability_
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>> m.remanence_.value()
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>> m.orientation_;
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is.readEnd("magnet");
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// Check state of Istream
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is.check("operator>>(Istream&, magnet&)");
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return is;
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}
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inline friend Ostream& operator<<(Ostream& os, const magnet& m)
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{
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os << token::BEGIN_LIST
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<< m.name_ << token::SPACE
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<< m.relativPermeability_ << token::SPACE
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<< m.remanence_.value()
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<< m.orientation_
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<< token::END_LIST;
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return os;
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}
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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@ -0,0 +1,111 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2010-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Application
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magneticFoam
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Description
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Solver for the magnetic field generated by permanent magnets.
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A Poisson's equation for the magnetic scalar potential psi is solved
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from which the magnetic field intensity H and magnetic flux density B
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are obtained.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "OSspecific.H"
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#include "magnet.H"
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#include "electromagneticConstants.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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argList::addBoolOption("noH", "do not write the magnetic field");
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argList::addBoolOption("noB", "do not write the magnetic field");
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#include "setRootCase.H"
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#include "createTime.H"
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#include "createMesh.H"
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#include "createFields.H"
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#include "readSIMPLEControls.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Info<< "Calculating the magnetic field potential" << endl;
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runTime++;
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for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
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{
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solve(fvm::laplacian(murf, psi) + fvc::div(murf*Mrf));
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}
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psi.write();
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if (!args.optionFound("noH"))
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{
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Info<< nl
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<< "Creating field H for time " << runTime.timeName() << endl;
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volVectorField H
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(
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IOobject
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(
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"H",
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runTime.timeName(),
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mesh
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),
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fvc::reconstruct(fvc::snGrad(psi)*mesh.magSf())
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);
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H.write();
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}
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if (!args.optionFound("noB"))
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{
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Info<< nl
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<< "Creating field B for time " << runTime.timeName() << endl;
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volVectorField B
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(
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IOobject
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(
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"B",
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runTime.timeName(),
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mesh
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),
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constant::electromagnetic::mu0
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*fvc::reconstruct(murf*fvc::snGrad(psi)*mesh.magSf() + murf*Mrf)
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);
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B.write();
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}
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Info<< "\nEnd\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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