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

#include <thixotropicViscosity.H>

Inheritance diagram for thixotropicViscosity:

Collaboration diagram for thixotropicViscosity:

[legend]

Public Member Functions
	TypeName ("thixotropic")
	Runtime type information.
	thixotropicViscosity (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
	Construct from surface film model.
virtual	~thixotropicViscosity ()
	Destructor.
virtual void	correct (const volScalarField &p, const volScalarField &T)
	Correct.
Public Member Functions inherited from filmViscosityModel
	TypeName ("filmViscosityModel")
	Runtime type information.
	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)
	Construct from type name, dictionary and surface film model.
virtual	~filmViscosityModel ()
	Destructor.
virtual void	info (Ostream &os) const
	Provide some feedback.
Public Member Functions inherited from filmSubModelBase
	filmSubModelBase (surfaceFilmRegionModel &film)
	Construct null.
	filmSubModelBase (surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
	Construct from film film without name.
	filmSubModelBase (const word &modelName, surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType)
	Construct from film film with name.
virtual	~filmSubModelBase ()
	Destructor.
virtual bool	writeTime () const
	Flag to indicate when to write a property.
const surfaceFilmRegionModel &	film () const
	Return const access to the film surface film model.
surfaceFilmRegionModel &	film ()
	Return the reference to the film surface film model.
template<class FilmType>
const FilmType &	filmType () const
Public Member Functions inherited from subModelBase
	subModelBase (dictionary &properties)
	Construct null.
	subModelBase (dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
	Construct from components without name.
	subModelBase (const word &modelName, dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType)
	Construct from components with name.
	subModelBase (const subModelBase &smb)
	Construct as copy.
virtual	~subModelBase ()=default
	Destructor.
const word &	modelName () const
	Return const access to the name of the sub-model.
const dictionary &	dict () const
	Return const access to the cloud dictionary.
const word &	baseName () const
	Return const access to the base name of the sub-model.
const word &	modelType () const
	Return const access to the sub-model type.
const dictionary &	coeffDict () const
	Return const access to the coefficients dictionary.
const dictionary &	properties () const
	Return const access to the properties dictionary.
virtual bool	defaultCoeffs (const bool printMsg) const
	Returns true if defaultCoeffs is true and outputs on printMsg.
virtual bool	active () const
	Return the model 'active' status - default active = true.
virtual void	cacheFields (const bool store)
	Cache dependent sub-model fields.
virtual fileName	localPath () const
	Output directory.
template<class Type>
Type	getBaseProperty (const word &entryName, const Type &defaultValue=Type(Zero)) const
	Retrieve generic property from the base model.
template<class Type>
void	getBaseProperty (const word &entryName, Type &value) const
	Retrieve generic property from the base model.
template<class Type>
void	setBaseProperty (const word &entryName, const Type &value)
	Add generic property to the base model.
bool	getModelDict (const word &entryName, dictionary &dict) const
	Retrieve dictionary, return true if set.
template<class Type>
bool	getModelProperty (const word &entryName, Type &value) const
	Retrieve generic property from the sub-model.
template<class Type>
Type	getModelProperty (const word &entryName, const Type &defaultValue=Type(Zero)) const
	Retrieve generic property from the sub-model.
template<class Type>
void	setModelProperty (const word &entryName, const Type &value)
	Add generic property to the sub-model.
virtual void	write (Ostream &os) const
	Write.

Protected Attributes
dimensionedScalar	mu0_
	Model `a' coefficient */ dimensionedScalar a_;.
dimensionedScalar	muInf_
	Limiting viscosity when lambda = 0.
dimensionedScalar	K_
	Model coefficient.
volScalarField	lambda_
	Structural parameter.
Protected Attributes inherited from filmViscosityModel
volScalarField &	mu_
	Reference to the viscosity field.
Protected Attributes inherited from filmSubModelBase
surfaceFilmRegionModel &	filmModel_
	Reference to the film surface film model.
Protected Attributes inherited from subModelBase
const word	modelName_
	Name of the sub-model.
dictionary &	properties_
	Reference to properties dictionary e.g. for restart.
const dictionary	dict_
	Copy of dictionary used during construction.
const word	baseName_
	Name of the sub-model base class.
const word	modelType_
	Type of the sub-model.
const dictionary	coeffDict_
	Coefficients dictionary.

Additional Inherited Members
Static Public Member Functions inherited from filmViscosityModel
static autoPtr< filmViscosityModel >	New (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
	Return a reference to the selected phase change model.
Public Attributes inherited from subModelBase
bool	log
	Flag to write log into Info.
Protected Member Functions inherited from subModelBase
bool	inLine () const
	Flag to indicate whether data is/was read in-line.

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
	=	model coefficient
	=	model coefficient
	=	model coefficient
	=	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 )

Construct from surface film model.

Definition at line 54 of file thixotropicViscosity.C.

References subModelBase::coeffDict_, subModelBase::dict(), Foam::dimless, Foam::dimPressure, Foam::dimTime, filmSubModelBase::film(), Foam::GlobalIOList< Tuple2< scalar, vector > >::typeName, K_, lambda_, mu, mu0_, filmViscosityModel::mu_, muInf_, Foam::pow(), Foam::sqrt(), and timeName.

Here is the call graph for this function:

◆ ~thixotropicViscosity()

~thixotropicViscosity ( )

virtual

Destructor.

Definition at line 93 of file thixotropicViscosity.C.

Member Function Documentation

◆ TypeName()

TypeName ( "thixotropic" )

Runtime type information.

References subModelBase::dict(), filmSubModelBase::film(), mu, p, and Foam::T().

Here is the call graph for this function:

◆ correct()

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

virtual

Correct.

Implements filmViscosityModel.

Definition at line 99 of file thixotropicViscosity.C.

References alpha, Foam::fvm::ddt(), delta, DimensionedField< Type, GeoMesh >::dimensions(), Foam::dimless, Foam::dimTime, Foam::fvc::div(), Foam::fvm::div(), filmSubModelBase::film(), filmSubModelBase::filmType(), Foam::fvc::interpolate(), K_, lambda_, Foam::mag(), Foam::max(), filmViscosityModel::mu_, muInf_, p, phi, Foam::pow(), regionModel::regionMesh(), fvMatrix< Type >::relax(), runTime, fvMatrix< Type >::solve(), Foam::fvm::Sp(), Foam::sqr(), Foam::fvm::SuSp(), Foam::T(), fvMesh::time(), U, regIOobject::write(), and Foam::Zero.

Here is the call graph for this function:

Member Data Documentation

◆ mu0_

dimensionedScalar mu0_

protected

Model `a' coefficient */ dimensionedScalar a_;.

/*!

Model `b' coefficient */ dimensionedScalar b_;

/*!

Model `d' coefficient */ dimensionedScalar d_;

/*!

Model `c' coefficient (read after d since dims depend on d value) */ dimensionedScalar c_;

/*!

Limiting viscosity when lambda = 1

Definition at line 161 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity().

◆ muInf_

dimensionedScalar muInf_

protected

Limiting viscosity when lambda = 0.

Definition at line 166 of file thixotropicViscosity.H.

Referenced by correct(), and thixotropicViscosity().

◆ K_

dimensionedScalar K_

protected

Model coefficient.

Definition at line 171 of file thixotropicViscosity.H.

Referenced by correct(), and thixotropicViscosity().

◆ lambda_

volScalarField lambda_

protected

Structural parameter.

0 = freestream value (most liquid) 1 = fully built (most solid)

Definition at line 179 of file thixotropicViscosity.H.

Referenced by correct(), and thixotropicViscosity().

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

src/regionModels/surfaceFilmModels/submodels/thermo/filmViscosityModel/thixotropicViscosity/thixotropicViscosity.H
src/regionModels/surfaceFilmModels/submodels/thermo/filmViscosityModel/thixotropicViscosity/thixotropicViscosity.C

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ thixotropicViscosity()

◆ ~thixotropicViscosity()

Member Function Documentation

◆ TypeName()

◆ correct()

Member Data Documentation

◆ mu0_

◆ muInf_

◆ K_

◆ lambda_