Commit 0de810db authored by Henry Weller's avatar Henry Weller
Browse files

viscosityModels::strainRateFunction: New run-time selected strain-rate...

viscosityModels::strainRateFunction: New run-time selected strain-rate function non-Newtonian viscosity model

Uses 'Function1' to provide support for an extensible range of run-time
selected functions including interpolation of tabulated data etc.
parent d93c0379
......@@ -6,6 +6,7 @@ viscosityModels/CrossPowerLaw/CrossPowerLaw.C
viscosityModels/BirdCarreau/BirdCarreau.C
viscosityModels/HerschelBulkley/HerschelBulkley.C
viscosityModels/Casson/Casson.C
viscosityModels/strainRateFunction/strainRateFunction.C
transportModel/transportModel.C
singlePhaseTransportModel/singlePhaseTransportModel.C
......
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2016 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "strainRateFunction.H"
#include "addToRunTimeSelectionTable.H"
#include "surfaceFields.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
namespace viscosityModels
{
defineTypeNameAndDebug(strainRateFunction, 0);
addToRunTimeSelectionTable
(
viscosityModel,
strainRateFunction,
dictionary
);
}
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::viscosityModels::strainRateFunction::strainRateFunction
(
const word& name,
const dictionary& viscosityProperties,
const volVectorField& U,
const surfaceScalarField& phi
)
:
viscosityModel(name, viscosityProperties, U, phi),
strainRateFunctionCoeffs_(viscosityProperties.subDict(typeName + "Coeffs")),
strainRateFunction_
(
Function1<scalar>::New("function", strainRateFunctionCoeffs_)
),
nu_
(
IOobject
(
name,
U_.time().timeName(),
U_.db(),
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
U_.mesh(),
dimensionedScalar(name, dimViscosity, 0)
)
{
correct();
}
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::tmp<Foam::volScalarField>
Foam::viscosityModels::strainRateFunction::nu() const
{
return nu_;
}
Foam::tmp<Foam::scalarField>
Foam::viscosityModels::strainRateFunction::nu(const label patchi) const
{
return nu_.boundaryField()[patchi];
}
void Foam::viscosityModels::strainRateFunction::correct()
{
tmp<volScalarField> tsigma = strainRate();
const volScalarField& sigma = tsigma();
nu_.primitiveFieldRef() = strainRateFunction_->value(sigma());
volScalarField::Boundary& nuBf = nu_.boundaryFieldRef();
const volScalarField::Boundary& sigmaBf = sigma.boundaryField();
forAll(nuBf, patchi)
{
nuBf[patchi] = strainRateFunction_->value(sigmaBf[patchi]);
}
}
bool Foam::viscosityModels::strainRateFunction::read
(
const dictionary& viscosityProperties
)
{
viscosityModel::read(viscosityProperties);
strainRateFunctionCoeffs_ = viscosityProperties.subDict
(
typeName + "Coeffs"
);
strainRateFunction_.clear();
strainRateFunction_ = Function1<scalar>::New
(
"function",
strainRateFunctionCoeffs_
);
return true;
}
// ************************************************************************* //
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2016 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::viscosityModels::strainRateFunction
Description
Run-time selected strain-rate function non-Newtonian viscosity model.
Example linear function of strain-rate:
\verbatim
transportModel strainRateFunction;
strainRateFunctionCoeffs
{
function polynomial ((0 0.1) (1 1.3));
}
\endverbatim
See also
Foam::viscosityModel
Foam::Function1
SourceFiles
strainRateFunction.C
\*---------------------------------------------------------------------------*/
#ifndef strainRateFunction_H
#define strainRateFunction_H
#include "viscosityModel.H"
#include "volFields.H"
#include "Function1.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace viscosityModels
{
/*---------------------------------------------------------------------------*\
Class strainRateFunction Declaration
\*---------------------------------------------------------------------------*/
class strainRateFunction
:
public viscosityModel
{
// Private data
//- Coefficients dictionary
dictionary strainRateFunctionCoeffs_;
//- Strain-rate function
autoPtr<Function1<scalar>> strainRateFunction_;
//- Current viscosity field
volScalarField nu_;
public:
//- Runtime type information
TypeName("strainRateFunction");
// Constructors
//- Construct from components
strainRateFunction
(
const word& name,
const dictionary& viscosityProperties,
const volVectorField& U,
const surfaceScalarField& phi
);
//- Destructor
virtual ~strainRateFunction()
{}
// Member Functions
//- Return the laminar viscosity
virtual tmp<volScalarField> nu() const;
//- Return the laminar viscosity for patch
virtual tmp<scalarField> nu(const label patchi) const;
//- Correct the laminar viscosity
virtual void correct();
//- Read transportProperties dictionary
virtual bool read(const dictionary& viscosityProperties);
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace viscosityModels
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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