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src
finiteVolume
interpolation
surfaceInterpolation
limitedSchemes
Phi
Phi.H
Go to the documentation of this 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) 1991-2010 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::PhiLimiter
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Description
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Class with limiter function which returns the limiter for the
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Phi differencing scheme.
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Used in conjunction with the template class PhiScheme.
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SourceFiles
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Phi.C
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\*---------------------------------------------------------------------------*/
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#ifndef Phi_H
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#define Phi_H
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#include <
OpenFOAM/vector.H
>
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace
Foam
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{
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/*---------------------------------------------------------------------------*\
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Class PhiLimiter Declaration
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\*---------------------------------------------------------------------------*/
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class
PhiLimiter
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{
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scalar k_;
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public
:
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PhiLimiter
(
Istream
& is)
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:
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k_(
readScalar
(is))
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{
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if
(k_ < 0 || k_ > 1)
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{
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FatalIOErrorIn
(
"PhiLimiter(Istream& is)"
, is)
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<<
"coefficient = "
<< k_
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<<
" should be >= 0 and <= 1"
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<<
exit
(
FatalIOError
);
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}
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}
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scalar
limiter
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(
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const
scalar cdWeight,
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const
scalar faceFlux,
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const
vector
& PhiP,
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const
vector
& PhiN,
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const
vector
& Sf,
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const
scalar&
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)
const
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{
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scalar phiP = Sf&PhiP;
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scalar phiN = Sf&PhiN;
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scalar
phiU
;
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if
(faceFlux > 0)
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{
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phiU = phiP;
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}
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else
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{
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phiU = phiN;
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}
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scalar phiCD = cdWeight*phiP + (1 - cdWeight)*phiN;
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// Calculate the effective limiter for the Phi interpolation
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//scalar PLimiter =
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// (1.0 - k_) + k_*(faceFlux - phiU)/stabilise(phiCD - phiU, SMALL);
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scalar PLimiter =
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((faceFlux -
phiU
)/
stabilise
(phiCD - phiU, SMALL) + k_);
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// Limit the limiter between upwind and central
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return
max
(
min
(PLimiter, 1), 0);
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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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// ************************ vim: set sw=4 sts=4 et: ************************ //