thixotropicViscosity Class Reference

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

Inheritance diagram for thixotropicViscosity:
Collaboration diagram for thixotropicViscosity:

Public Member Functions

 TypeName ("thixotropic")
 Runtime type information. More...
 
 thixotropicViscosity (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 Construct from surface film model. More...
 
 thixotropicViscosity (const thixotropicViscosity &)=delete
 Disallow default bitwise copy construction. More...
 
virtual ~thixotropicViscosity ()
 Destructor. More...
 
virtual void correct (const volScalarField &p, const volScalarField &T)
 Correct. More...
 
void operator= (const thixotropicViscosity &)=delete
 Disallow default bitwise assignment. More...
 
- Public Member Functions inherited from viscosityModel
 TypeName ("viscosity")
 Runtime type information. More...
 
 declareRunTimeSelectionTable (autoPtr, viscosityModel, dictionary,(surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu),(film, dict, mu))
 
 viscosityModel (const word &modelType, surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 Construct from type name, dictionary and surface film model. More...
 
 viscosityModel (const viscosityModel &)=delete
 Disallow default bitwise copy construction. More...
 
virtual ~viscosityModel ()
 Destructor. More...
 
virtual void info (Ostream &os) const
 Provide some feedback. More...
 
void operator= (const viscosityModel &)=delete
 Disallow default bitwise assignment. More...
 
- Public Member Functions inherited from filmSubModelBase
 filmSubModelBase (surfaceFilmRegionModel &film)
 Construct null. More...
 
 filmSubModelBase (surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
 Construct from film film without name. More...
 
 filmSubModelBase (const word &modelName, surfaceFilmRegionModel &film, const dictionary &dict, const word &baseName, const word &modelType)
 Construct from film film with name. More...
 
virtual ~filmSubModelBase ()
 Destructor. More...
 
virtual bool writeTime () const
 Flag to indicate when to write a property. More...
 
const surfaceFilmRegionModelfilm () const
 Return const access to the film surface film model. More...
 
surfaceFilmRegionModelfilm ()
 Return the reference to the film surface film model. More...
 
template<class FilmType >
const FilmType & filmType () const
 
- Public Member Functions inherited from subModelBase
 subModelBase (dictionary &properties)
 Construct null. More...
 
 subModelBase (dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType, const word &dictExt="Coeffs")
 Construct from components without name. More...
 
 subModelBase (const word &modelName, dictionary &properties, const dictionary &dict, const word &baseName, const word &modelType)
 Construct from components with name. More...
 
 subModelBase (const subModelBase &smb)
 Copy constructor. More...
 
virtual ~subModelBase ()
 Destructor. More...
 
const wordmodelName () const
 Return const access to the name of the sub-model. More...
 
const dictionarydict () const
 Return const access to the cloud dictionary. More...
 
const wordbaseName () const
 Return const access to the base name of the sub-model. More...
 
const wordmodelType () const
 Return const access to the sub-model type. More...
 
const dictionarycoeffDict () const
 Return const access to the coefficients dictionary. More...
 
const dictionaryproperties () const
 Return const access to the properties dictionary. More...
 
virtual bool defaultCoeffs (const bool printMsg) const
 Returns true if defaultCoeffs is true and outputs on printMsg. More...
 
virtual void cacheFields (const bool store)
 Cache dependent sub-model fields. More...
 
template<class Type >
Type getBaseProperty (const word &entryName, const Type &defaultValue=pTraits< Type >::zero) const
 Retrieve generic property from the base model. More...
 
template<class Type >
void getBaseProperty (const word &entryName, Type &value) const
 Retrieve generic property from the base model. More...
 
template<class Type >
void setBaseProperty (const word &entryName, const Type &value)
 Add generic property to the base model. More...
 
template<class Type >
void getModelProperty (const word &entryName, Type &value) const
 Retrieve generic property from the sub-model. More...
 
template<class Type >
Type getModelProperty (const word &entryName, const Type &defaultValue=pTraits< Type >::zero) const
 Retrieve generic property from the sub-model. More...
 
template<class Type >
void setModelProperty (const word &entryName, const Type &value)
 Add generic property to the sub-model. More...
 
virtual void write (Ostream &os) const
 Write. More...
 
void operator= (const subModelBase &)=delete
 Disallow default bitwise assignment. More...
 

Protected Attributes

dimensionedScalar a_
 Model `a' coefficient. More...
 
dimensionedScalar b_
 Model `b' coefficient. More...
 
dimensionedScalar d_
 Model `d' coefficient. More...
 
dimensionedScalar c_
 Model `c' coefficient (read after d since dims depend on d value) More...
 
dimensionedScalar mu0_
 Limiting viscosity when lambda = 1. More...
 
dimensionedScalar muInf_
 Limiting viscosity when lambda = 0. More...
 
bool BinghamPlastic_
 
dimensionedScalar tauy_
 
dimensionedScalar K_
 Model coefficient. More...
 
volScalarField lambda_
 Structural parameter. More...
 
- Protected Attributes inherited from viscosityModel
volScalarFieldmu_
 Reference to the viscosity field. More...
 
- Protected Attributes inherited from filmSubModelBase
surfaceFilmRegionModelfilmModel_
 Reference to the film surface film model. More...
 
- Protected Attributes inherited from subModelBase
const word modelName_
 Name of the sub-model. More...
 
dictionaryproperties_
 Reference to properties dictionary e.g. for restart. More...
 
const dictionary dict_
 Copy of dictionary used during construction. More...
 
const word baseName_
 Name of the sub-model base class. More...
 
const word modelType_
 Type of the sub-model. More...
 
const dictionary coeffDict_
 Coefficients dictionary. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from viscosityModel
static autoPtr< viscosityModelNew (surfaceFilmRegionModel &film, const dictionary &dict, volScalarField &mu)
 Return a reference to the selected phase change model. More...
 
- Protected Member Functions inherited from subModelBase
bool inLine () const
 Flag to indicate whether data is/was read in-line. More...
 

Detailed Description

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

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

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 119 of file thixotropicViscosity.H.

Constructor & Destructor Documentation

◆ thixotropicViscosity() [1/2]

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

Construct from surface film model.

Definition at line 59 of file thixotropicViscosity.C.

◆ thixotropicViscosity() [2/2]

Disallow default bitwise copy construction.

◆ ~thixotropicViscosity()

~thixotropicViscosity ( )
virtual

Destructor.

Definition at line 104 of file thixotropicViscosity.C.

References thixotropicViscosity::correct().

Here is the call graph for this function:

Member Function Documentation

◆ TypeName()

TypeName ( "thixotropic"  )

Runtime type information.

◆ correct()

◆ operator=()

void operator= ( const thixotropicViscosity )
delete

Disallow default bitwise assignment.

Member Data Documentation

◆ a_

dimensionedScalar a_
protected

Model `a' coefficient.

Definition at line 128 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ b_

dimensionedScalar b_
protected

Model `b' coefficient.

Definition at line 131 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ d_

dimensionedScalar d_
protected

Model `d' coefficient.

Definition at line 134 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ c_

dimensionedScalar c_
protected

Model `c' coefficient (read after d since dims depend on d value)

Definition at line 137 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ mu0_

dimensionedScalar mu0_
protected

Limiting viscosity when lambda = 1.

Definition at line 140 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ muInf_

dimensionedScalar muInf_
protected

Limiting viscosity when lambda = 0.

Definition at line 143 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ BinghamPlastic_

bool BinghamPlastic_
protected

Definition at line 145 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ tauy_

dimensionedScalar tauy_
protected

Definition at line 147 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ K_

dimensionedScalar K_
protected

Model coefficient.

Definition at line 150 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().

◆ lambda_

volScalarField lambda_
protected

Structural parameter.

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

Definition at line 155 of file thixotropicViscosity.H.

Referenced by thixotropicViscosity::correct().


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