120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
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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) 2004-2007 Hrvoje Jasak
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Application
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calculateCourantNumber
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Description
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Simple utility which calculate the Courant number for solid mechanics
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models.
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Author
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Philip Cardiff UCD
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "constitutiveModel.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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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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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Info<< "\nCalculating Courant number\n" << endl;
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// Calculate Courant number for every face
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// Mechanical properties
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volVectorField U
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(
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IOobject
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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::NO_READ,
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IOobject::NO_WRITE
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),
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mesh,
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dimensionedVector("zero", dimLength, vector::zero)
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);
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volSymmTensorField sigma
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(
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IOobject
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(
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"sigma",
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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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mesh,
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dimensionedSymmTensor("zero", dimForce/dimArea, symmTensor::zero)
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);
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constitutiveModel rheology(sigma, U);
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volScalarField mu = rheology.mu();
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volScalarField lambda = rheology.lambda();
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volScalarField rho = rheology.rho();
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surfaceScalarField Ef = fvc::interpolate(mu*(3*lambda + 2*mu)/(lambda+mu), "E");
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surfaceScalarField nuf = fvc::interpolate(lambda/(2*(lambda+mu)), "nu");
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surfaceScalarField rhof = fvc::interpolate(rho);
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surfaceScalarField waveVelocity =
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Foam::sqrt(Ef*(1 - nuf)/(rhof*(1 + nuf)*(1 - 2*nuf)));
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// Courant number
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scalarField Co =
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waveVelocity.internalField()*runTime.deltaT().value()
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*mesh.surfaceInterpolation::deltaCoeffs().internalField();
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// Calculate required time-step for a Courant number of 1.0
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scalar requiredDeltaT = 1.0 /
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gMax(mesh.surfaceInterpolation::deltaCoeffs().internalField()*waveVelocity.internalField());
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scalar averageCo = gAverage(Co);
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scalar maxCo = gMax(Co);
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scalar averageWaveVel = gAverage(waveVelocity);
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scalar maxWaveVel = gMax(waveVelocity);
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Info << "\nCourant Number\n\tmean: " << averageCo
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<< "\n\tmax: " << maxCo << nl
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<< "Wave velocity magnitude\n\tmean " << averageWaveVel
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<< "\n\tmax: " << maxWaveVel << nl
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<< "Time step required for a maximum Courant number of 1.0 is "
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<< requiredDeltaT << endl;
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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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