Public Types | Public Member Functions | List of all members
lambdaThixotropic< BasicMomentumTransportModel > Class Template Reference

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

Inheritance diagram for lambdaThixotropic< BasicMomentumTransportModel >:
Inheritance graph
[legend]
Collaboration diagram for lambdaThixotropic< BasicMomentumTransportModel >:
Collaboration graph
[legend]

Public Types

typedef BasicMomentumTransportModel::alphaField alphaField
 
typedef BasicMomentumTransportModel::rhoField rhoField
 
- Public Types inherited from linearViscousStress< laminarModel< BasicMomentumTransportModel > >
typedef laminarModel< BasicMomentumTransportModel > ::alphaField alphaField
 
typedef laminarModel< BasicMomentumTransportModel > ::rhoField rhoField
 
- Public Types inherited from laminarModel< BasicMomentumTransportModel >
typedef BasicMomentumTransportModel::alphaField alphaField
 
typedef BasicMomentumTransportModel::rhoField rhoField
 

Public Member Functions

 TypeName ("lambdaThixotropic")
 Runtime type information. More...
 
 lambdaThixotropic (const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const viscosity &viscosity)
 Construct from components. More...
 
virtual ~lambdaThixotropic ()
 Destructor. More...
 
virtual bool read ()
 Read momentumTransport dictionary. More...
 
virtual tmp< volScalarField > nuEff () const
 Return the effective viscosity. More...
 
virtual tmp< scalarField > nuEff (const label patchi) const
 Return the effective viscosity on patch. More...
 
virtual void correct ()
 Correct the lambdaThixotropic viscosity. More...
 
- Public Member Functions inherited from linearViscousStress< laminarModel< BasicMomentumTransportModel > >
 linearViscousStress (const word &modelName, const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const viscosity &viscosity)
 Construct from components. More...
 
virtual ~linearViscousStress ()
 Destructor. More...
 
virtual tmp< volSymmTensorField > devTau () const
 Return the effective stress tensor. More...
 
virtual tmp< fvVectorMatrix > divDevTau (volVectorField &U) const
 Return the source term for the momentum equation. More...
 
virtual tmp< fvVectorMatrix > divDevTau (const volScalarField &rho, volVectorField &U) const
 Return the source term for the momentum equation. More...
 
- Public Member Functions inherited from laminarModel< BasicMomentumTransportModel >
 TypeName ("laminar")
 Runtime type information. More...
 
 declareRunTimeSelectionTable (autoPtr, laminarModel, dictionary,(const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const viscosity &viscosity),(alpha, rho, U, alphaRhoPhi, phi, viscosity))
 
 laminarModel (const word &type, const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const viscosity &viscosity)
 Construct from components. More...
 
 laminarModel (const laminarModel &)=delete
 Disallow default bitwise copy construction. More...
 
virtual ~laminarModel ()
 Destructor. More...
 
virtual const dictionary & coeffDict () const
 Const access to the coefficients dictionary. More...
 
virtual tmp< volScalarField > nut () const
 Return the turbulence viscosity, i.e. 0 for laminar flow. More...
 
virtual tmp< scalarField > nut (const label patchi) const
 Return the turbulence viscosity on patch. More...
 
virtual tmp< volScalarField > k () const
 Return the turbulence kinetic energy, i.e. 0 for laminar flow. More...
 
virtual tmp< volScalarField > epsilon () const
 Return the turbulence kinetic energy dissipation rate,. More...
 
virtual tmp< volScalarField > omega () const
 Return the turbulence specific dissipation rate,. More...
 
virtual tmp< volSymmTensorField > sigma () const
 Return the stress tensor [m^2/s^2], i.e. 0 for laminar flow. More...
 
void operator= (const laminarModel &)=delete
 Disallow default bitwise assignment. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from laminarModel< BasicMomentumTransportModel >
static autoPtr< laminarModel > New (const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const viscosity &viscosity)
 Return a reference to the selected laminar model. More...
 
- Protected Member Functions inherited from laminarModel< BasicMomentumTransportModel >
virtual void printCoeffs (const word &type)
 Print model coefficients. More...
 
- Protected Attributes inherited from laminarModel< BasicMomentumTransportModel >
dictionary laminarDict_
 laminar coefficients dictionary More...
 
Switch printCoeffs_
 Flag to print the model coeffs at run-time. More...
 
dictionary coeffDict_
 Model coefficients dictionary. More...
 

Detailed Description

template<class BasicMomentumTransportModel>
class Foam::laminarModels::lambdaThixotropic< BasicMomentumTransportModel >

Thixotropic viscosity momentum transport 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

\[ \nu = \frac{\nu_{\infty}}{{1 - K \lambda}^2} \]

Where the parameter K is given by:

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

Here:

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

Member Typedef Documentation

◆ alphaField

typedef BasicMomentumTransportModel::alphaField alphaField

Definition at line 166 of file lambdaThixotropic.H.

◆ rhoField

typedef BasicMomentumTransportModel::rhoField rhoField

Definition at line 167 of file lambdaThixotropic.H.

Constructor & Destructor Documentation

◆ lambdaThixotropic()

lambdaThixotropic ( const alphaField &  alpha,
const rhoField &  rho,
const volVectorField &  U,
const surfaceScalarField &  alphaRhoPhi,
const surfaceScalarField &  phi,
const viscosity &  viscosity 
)

Construct from components.

Definition at line 42 of file lambdaThixotropic.C.

References Foam::fvc::grad(), Foam::mag(), Foam::sqr(), Foam::sqrt(), Foam::symm(), and U.

Here is the call graph for this function:

◆ ~lambdaThixotropic()

virtual ~lambdaThixotropic ( )
inlinevirtual

Destructor.

Definition at line 189 of file lambdaThixotropic.H.

References lambdaThixotropic< BasicMomentumTransportModel >::correct(), lambdaThixotropic< BasicMomentumTransportModel >::nuEff(), patchi, and lambdaThixotropic< BasicMomentumTransportModel >::read().

Here is the call graph for this function:

Member Function Documentation

◆ TypeName()

TypeName ( "lambdaThixotropic< BasicMomentumTransportModel >"  )

Runtime type information.

◆ read()

bool read ( )
virtual

Read momentumTransport dictionary.

Implements linearViscousStress< laminarModel< BasicMomentumTransportModel > >.

Definition at line 127 of file lambdaThixotropic.C.

References Foam::dimTime, Foam::pow(), and Foam::sqrt().

Referenced by lambdaThixotropic< BasicMomentumTransportModel >::~lambdaThixotropic().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ nuEff() [1/2]

tmp< volScalarField > nuEff ( ) const
virtual

Return the effective viscosity.

i.e. the lambdaThixotropic viscosity

Implements laminarModel< BasicMomentumTransportModel >.

Definition at line 158 of file lambdaThixotropic.C.

References IOobject::groupName(), and GeometricField< scalar, fvPatchField, volMesh >::New().

Referenced by lambdaThixotropic< BasicMomentumTransportModel >::~lambdaThixotropic().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ nuEff() [2/2]

tmp< scalarField > nuEff ( const label  patchi) const
virtual

Return the effective viscosity on patch.

Implements laminarModel< BasicMomentumTransportModel >.

Definition at line 171 of file lambdaThixotropic.C.

References patchi.

◆ correct()

void correct ( )
virtual

Correct the lambdaThixotropic viscosity.

Implements linearViscousStress< laminarModel< BasicMomentumTransportModel > >.

Definition at line 180 of file lambdaThixotropic.C.

References fvConstraints::constrain(), laminarModel< BasicMomentumTransportModel >::correct(), Foam::fvm::ddt(), Foam::fvm::div(), Foam::fvc::div(), fvConstraints, fvModels, dictionary::New(), Foam::pow(), tmp< T >::ref(), Foam::solve(), and Foam::fvm::Sp().

Referenced by lambdaThixotropic< BasicMomentumTransportModel >::~lambdaThixotropic().

Here is the call graph for this function:
Here is the caller graph for this function:
The documentation for this class was generated from the following files: