203 lines
4.9 KiB
C
203 lines
4.9 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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Description
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\*---------------------------------------------------------------------------*/
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#include "MaxwellElasticViscoelastic.H"
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#include "addToRunTimeSelectionTable.H"
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#include "zeroGradientFvPatchFields.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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defineTypeNameAndDebug(MaxwellElasticViscoelastic, 0);
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addToRunTimeSelectionTable
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(
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rheologyLaw,
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MaxwellElasticViscoelastic,
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dictionary
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);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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// Construct from dictionary
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Foam::MaxwellElasticViscoelastic::MaxwellElasticViscoelastic
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(
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const word& name,
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const volSymmTensorField& sigma,
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const dictionary& dict
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)
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:
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rheologyLaw(name, sigma, dict),
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rho_(dict.lookup("rho")),
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k_(dict.lookup("k")),
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eta_(dict.lookup("eta")),
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nu_(dict.lookup("nu"))
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::MaxwellElasticViscoelastic::~MaxwellElasticViscoelastic()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::tmp<Foam::volScalarField>
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Foam::MaxwellElasticViscoelastic::rho(scalar t) const
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{
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tmp<volScalarField> tresult
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(
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new volScalarField
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(
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IOobject
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(
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"rho",
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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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rho_,
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zeroGradientFvPatchScalarField::typeName
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)
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);
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tresult().correctBoundaryConditions();
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return tresult;
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}
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Foam::tmp<Foam::volScalarField>
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Foam::MaxwellElasticViscoelastic::E(scalar t) const
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{
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scalar tau = eta_.value()/k_.value();
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tmp<volScalarField> tE
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(
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new volScalarField
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(
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IOobject
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(
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"E",
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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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k_*exp(-t/tau),
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zeroGradientFvPatchScalarField::typeName
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)
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);
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if (t < 0)
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{
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tE().internalField() = 0.0;
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tE().correctBoundaryConditions();
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}
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return tE;
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}
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Foam::tmp<Foam::volScalarField>
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Foam::MaxwellElasticViscoelastic::nu(scalar t) const
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{
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scalar tau = eta_.value()/k_.value();
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scalar E0 = k_.value();
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scalar Et = k_.value()*exp(-t/tau);
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scalar nu = 0.5 - Et/(6*E0);
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tmp<volScalarField> tresult
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(
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new volScalarField
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(
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IOobject
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(
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"nu",
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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("nu", dimless, nu),
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zeroGradientFvPatchScalarField::typeName
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)
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);
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tresult().correctBoundaryConditions();
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return tresult;
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}
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Foam::tmp<Foam::volScalarField>
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Foam::MaxwellElasticViscoelastic::J(scalar t) const
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{
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tmp<volScalarField> tJ
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(
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new volScalarField
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(
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IOobject
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(
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"J",
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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
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(
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"J",
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dimless/k_.dimensions(),
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1.0/k_.value() + t/eta_.value()
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),
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zeroGradientFvPatchScalarField::typeName
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)
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);
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if (t < 0)
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{
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tJ().internalField() = 0.0;
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tJ().correctBoundaryConditions();
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}
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return tJ;
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}
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// ************************************************************************* //
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