188 lines
5.4 KiB
C++
188 lines
5.4 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend 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 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Application
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icoMomentError
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Description
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Estimates error for the incompressible laminar CFD application icoFoam.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "linear.H"
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#include "gaussConvectionScheme.H"
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#include "gaussLaplacianScheme.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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timeSelector::addOptions();
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# include "setRootCase.H"
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# include "createTime.H"
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instantList timeDirs = timeSelector::select0(runTime, args);
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# include "createMesh.H"
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Info<< "\nEstimating error in the incompressible momentum equation\n"
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<< "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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dimensionedScalar nu
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(
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transportProperties.lookup("nu")
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);
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forAll(timeDirs, timeI)
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{
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runTime.setTime(timeDirs[timeI], timeI);
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Info<< "Time = " << runTime.timeName() << endl;
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mesh.readUpdate();
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IOobject pHeader
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(
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"p",
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runTime.timeName(),
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mesh,
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IOobject::MUST_READ
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);
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IOobject Uheader
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(
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"U",
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runTime.timeName(),
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mesh,
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IOobject::MUST_READ
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);
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if (pHeader.headerOk() && Uheader.headerOk())
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{
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Info << "Reading p" << endl;
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volScalarField p(pHeader, mesh);
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Info << "Reading U" << endl;
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volVectorField U(Uheader, mesh);
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# include "createPhi.H"
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volScalarField ek = 0.5*magSqr(U);
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volTensorField gradU = fvc::grad(U);
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// Divergence of the error in U squared
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volScalarField L
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(
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IOobject
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(
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"L",
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mesh.time().timeName(),
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mesh,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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mesh,
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dimensionedScalar("one", dimLength, 1.0)
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);
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L.internalField() =
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mesh.V()/fvc::surfaceSum(mesh.magSf())().internalField();
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// Warning: 4th row of this equation specially modified
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// for the momentum equation. The "real" formulation would
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// have diffusivity*(gradV && gradV)
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volScalarField momError
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(
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IOobject
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(
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"momErrorL" + U.name(),
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mesh.time().timeName(),
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mesh,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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sqrt
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(
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2.0*mag
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(
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(
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fv::gaussConvectionScheme<scalar>
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(
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mesh,
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phi,
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tmp<surfaceInterpolationScheme<scalar> >
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(
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new linear<scalar>(mesh)
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)
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).fvcDiv(phi, ek)
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- nu*
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fv::gaussLaplacianScheme<scalar, scalar>(mesh)
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.fvcLaplacian
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(
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ek
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)
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- (U & fvc::grad(p))
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// + nu*(gradU && gradU)
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+ 0.5*nu*
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(
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gradU && (gradU + gradU.T())
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)
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)*L/(mag(U) + nu/L)
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)
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)
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);
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momError.boundaryField() = 0.0;
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momError.write();
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}
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else
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{
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Info<< " No p or U" << endl;
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}
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Info<< endl;
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}
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Info<< "End\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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