Public Member Functions | Protected Attributes | List of all members
thixotropicViscosity Class Reference

Thixotropic viscosity model based on the evolution of the structural parameter $ \lambda $: More...

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Public Member Functions

 TypeName ("thixotropic")
 
 thixotropicViscosity (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 
virtual ~thixotropicViscosity ()
 
virtual void correct (const volScalarField &p, const volScalarField &T)
 
- Public Member Functions inherited from filmViscosityModel
 TypeName ("filmViscosityModel")
 
 declareRunTimeSelectionTable (autoPtr, filmViscosityModel, dictionary,(surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu),(film, dict, mu))
 
 filmViscosityModel (const word &modelType, surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 
virtual ~filmViscosityModel ()
 
virtual void info (Ostream &os) const
 
- Public Member Functions inherited from filmSubModelBase
 filmSubModelBase (surfaceFilmRegionModel &film)
 
 filmSubModelBase (surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
 
 filmSubModelBase (const word &modelName, surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType)
 
virtual ~filmSubModelBase ()
 
virtual bool writeTime () const
 
const surfaceFilmRegionModel & film () const
 
surfaceFilmRegionModel & film ()
 
template<class FilmType >
const FilmType & filmType () const
 
- Public Member Functions inherited from subModelBase
 subModelBase (dictionary &properties)
 
 subModelBase (dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
 
 subModelBase (const word &modelName, dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType)
 
 subModelBase (const subModelBase &smb)
 
virtual ~subModelBase ()
 
const word & modelName () const
 
const dictionary & dict () const
 
const word & baseName () const
 
const word & modelType () const
 
const dictionary & coeffDict () const
 
const dictionary & properties () const
 
virtual bool defaultCoeffs (const bool printMsg) const
 
virtual bool active () const
 
virtual void cacheFields (const bool store)
 
virtual fileName localPath () const
 
template<class Type >
Type getBaseProperty (const word &entryName, const Type &defaultValue=Type(Zero)) const
 
template<class Type >
void getBaseProperty (const word &entryName, Type &value) const
 
template<class Type >
void setBaseProperty (const word &entryName, const Type &value)
 
bool getModelDict (const word &entryName, dictionary &dict) const
 
template<class Type >
void getModelProperty (const word &entryName, Type &value) const
 
template<class Type >
Type getModelProperty (const word &entryName, const Type &defaultValue=Type(Zero)) const
 
template<class Type >
void setModelProperty (const word &entryName, const Type &value)
 
virtual void write (Ostream &os) const
 

Protected Attributes

dimensionedScalar a_
 
dimensionedScalar b_
 
dimensionedScalar d_
 
dimensionedScalar c_
 
dimensionedScalar mu0_
 
dimensionedScalar muInf_
 
dimensionedScalar K_
 
volScalarField lambda_
 
- Protected Attributes inherited from filmViscosityModel
volScalarField & mu_
 
- Protected Attributes inherited from filmSubModelBase
surfaceFilmRegionModel & filmModel_
 
- Protected Attributes inherited from subModelBase
const word modelName_
 
dictionary & properties_
 
const dictionary dict_
 
const word baseName_
 
const word modelType_
 
const dictionary coeffDict_
 

Additional Inherited Members

- Static Public Member Functions inherited from filmViscosityModel
static autoPtr< filmViscosityModel > New (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 
- Protected Member Functions inherited from subModelBase
bool inLine () const
 

Detailed Description

Thixotropic viscosity model based on the evolution of the structural parameter $ \lambda $:

\[ \lambda = a(1 - \lambda)^b - c \lambda \dot{\gamma}^d \]

The viscosity is then calculated using the expression

\[ \mu = \frac{\mu_{\infty}}{{1 - K \lambda}^2} \]

Where the parameter K is given by:

\[ K = 1 - \sqrt{\frac{\mu_{\infty}}{\mu_{0}}} \]

Here:

$ \lambda $ = structural parameter
$ a $ = model coefficient
$ b $ = model coefficient
$ c $ = model coefficient
$ d $ = model coefficient
$ \dot{\gamma} $ = stress rate [1/s]
$ \mu_{0} $ = limiting viscosity when $ \lambda = 1 $
$ \mu_{\infty} $ = limiting viscosity when $ \lambda = 0 $

Reference: 

        Barnes H A, 1997.  Thixotropy - a review.  J. Non-Newtonian Fluid
        Mech 70, pp 1-33
Source files

Definition at line 117 of file thixotropicViscosity.H.

Constructor & Destructor Documentation

◆ thixotropicViscosity()

thixotropicViscosity ( surfaceFilmRegionModel &  film,
const dictionary &  dict,
volScalarField &  mu 
)

Definition at line 54 of file thixotropicViscosity.C.

◆ ~thixotropicViscosity()

~thixotropicViscosity ( )
virtual

Definition at line 92 of file thixotropicViscosity.C.

Member Function Documentation

◆ TypeName()

TypeName ( "thixotropic"  )

◆ correct()

void correct ( const volScalarField &  p,
const volScalarField &  T 
)
virtual

Implements filmViscosityModel.

Definition at line 99 of file thixotropicViscosity.C.

References Foam::constant::atomic::alpha, kinematicSingleLayer::alpha(), Foam::fvm::ddt(), Foam::expressions::patchExpr::debug, delta, kinematicSingleLayer::delta(), kinematicSingleLayer::deltaRho(), kinematicSingleLayer::deltaSmall(), Foam::dimless, Foam::dimTime, Foam::fvm::div(), Foam::fvc::div(), Foam::fvc::interpolate(), Foam::mag(), Foam::max(), phi, kinematicSingleLayer::phi(), Foam::pow(), regionModel::regionMesh(), fvMatrix::relax(), kinematicSingleLayer::rhoSp(), runTime, fvMatrix::solve(), Foam::fvm::Sp(), Foam::sqr(), Foam::fvm::SuSp(), fvMesh::time(), U, kinematicSingleLayer::U(), kinematicSingleLayer::Uw(), and Foam::Zero.

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Member Data Documentation

◆ a_

dimensionedScalar a_
protected

Definition at line 135 of file thixotropicViscosity.H.

◆ b_

dimensionedScalar b_
protected

Definition at line 138 of file thixotropicViscosity.H.

◆ d_

dimensionedScalar d_
protected

Definition at line 141 of file thixotropicViscosity.H.

◆ c_

dimensionedScalar c_
protected

Definition at line 144 of file thixotropicViscosity.H.

◆ mu0_

dimensionedScalar mu0_
protected

Definition at line 147 of file thixotropicViscosity.H.

◆ muInf_

dimensionedScalar muInf_
protected

Definition at line 150 of file thixotropicViscosity.H.

◆ K_

dimensionedScalar K_
protected

Definition at line 153 of file thixotropicViscosity.H.

◆ lambda_

volScalarField lambda_
protected

Definition at line 158 of file thixotropicViscosity.H.

The documentation for this class was generated from the following files:

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