87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration |
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\\ / A nd | For copyright notice see file Copyright
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\\/ M anipulation |
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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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Lambda2
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Description
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Calculates and writes the second largest eigenvalue of the sum of the
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square of the symmetrical and anti-symmetrical parts of the velocity
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gradient tensor.
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The -noWrite option has no meaning.
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\*---------------------------------------------------------------------------*/
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#include "calc.H"
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#include "fvc.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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void Foam::calc(const argList& args, const Time& runTime, const fvMesh& mesh)
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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 (Uheader.headerOk())
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{
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Info<< " Reading U" << endl;
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volVectorField U(Uheader, mesh);
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const volTensorField gradU(fvc::grad(U));
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volTensorField SSplusWW =
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(symm(gradU) & symm(gradU));
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// (skew(gradU) & skew(gradU));
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volScalarField Lambda2
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(
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IOobject
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(
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"Lambda2",
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runTime.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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-eigenValues(SSplusWW)().component(vector::Y)
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);
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Info << " Writing -Lambda2" << endl;
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Lambda2.write();
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}
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else
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{
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Info<< " No U" << endl;
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}
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Info<< "\nEnd\n" << endl;
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}
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// ************************************************************************* //
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