Herschel-Bulkley generalised Newtonian viscosity model. More...

Inheritance diagram for HerschelBulkley:

Collaboration diagram for HerschelBulkley:

Public Member Functions
	TypeName ("HerschelBulkley")
	Runtime type information. More...

	HerschelBulkley (const dictionary &viscosityProperties, const Foam::viscosity &viscosity, const volVectorField &U)
	Construct from components. More...

virtual	~HerschelBulkley ()
	Destructor. More...

virtual bool	read (const dictionary &viscosityProperties)
	Read transportProperties dictionary. More...

virtual tmp< volScalarField >	nu (const volScalarField &nu0, const volScalarField &strainRate) const
	Return the laminar viscosity. More...

Public Member Functions inherited from strainRateViscosityModel
	TypeName ("strainRateViscosityModel")
	Runtime type information. More...

	strainRateViscosityModel (const dictionary &viscosityProperties, const viscosity &viscosity, const volVectorField &U)
	Construct from components. More...

	strainRateViscosityModel (const strainRateViscosityModel &)=delete
	Disallow default bitwise copy construction. More...

virtual	~strainRateViscosityModel ()
	Destructor. More...

virtual tmp< volScalarField >	nu () const
	Return the laminar viscosity. More...

virtual tmp< scalarField >	nu (const label patchi) const
	Return the laminar viscosity for patch. More...

virtual void	correct ()
	Correct the laminar viscosity. More...

void	operator= (const strainRateViscosityModel &)=delete
	Disallow default bitwise assignment. More...

Public Member Functions inherited from generalisedNewtonianViscosityModel
	TypeName ("generalisedNewtonianViscosityModel")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, generalisedNewtonianViscosityModel, dictionary,(const dictionary &viscosityProperties, const viscosity &viscosity, const volVectorField &U),(viscosityProperties, viscosity, U))

	generalisedNewtonianViscosityModel (const dictionary &viscosityProperties, const viscosity &viscosity, const volVectorField &U)
	Construct from components. More...

	generalisedNewtonianViscosityModel (const generalisedNewtonianViscosityModel &)=delete
	Disallow default bitwise copy construction. More...

virtual	~generalisedNewtonianViscosityModel ()
	Destructor. More...

void	operator= (const generalisedNewtonianViscosityModel &)=delete
	Disallow default bitwise assignment. More...

Public Member Functions inherited from viscosity
	TypeName ("viscosity")
	Runtime type information. More...

	viscosity ()
	Construct. More...

	viscosity (const viscosity &)=delete
	Disallow default bitwise copy construction. More...

virtual	~viscosity ()
	Destructor. More...

void	operator= (const viscosity &)=delete
	Disallow default bitwise assignment. More...

Additional Inherited Members
Static Public Member Functions inherited from generalisedNewtonianViscosityModel
static autoPtr< generalisedNewtonianViscosityModel >	New (const dictionary &viscosityProperties, const viscosity &viscosity, const volVectorField &U)
	Return a reference to the selected viscosity model. More...

Protected Member Functions inherited from strainRateViscosityModel
virtual tmp< volScalarField >	strainRate () const
	Return the strain-rate obtained from the velocity field. More...

Protected Attributes inherited from generalisedNewtonianViscosityModel
const viscosity &	viscosity_
	Reference to the fluid Newtonian viscosity. More...

const volVectorField &	U_
	Reference to the velocity field. More...

Detailed Description

Herschel-Bulkley generalised Newtonian viscosity model.

The Herschel-Bulkley model combines the effects of a Bingham plastic and power-law behaviour of a fluid. At a low strain rate $\gamma$ the fluid adopts a viscosity $\nu_0$ . Beyond a threshold stress $\tau_0$ , the viscosity is described as a power law.

Kinematic viscosity [m^2/s]

$\nu = \min(\nu_0, \tau_0/\gamma + k\gamma^{n - 1})$

Example specification:

     viscosityModel HerschelBulkley;

     tau0       0.01;
     k          0.001;
     n          0.2;

Note the viscosity nu0 at zero strain rate is a physical property, generally specified in the physicalProperties file.

Source files

Definition at line 75 of file HerschelBulkley.H.

Constructor & Destructor Documentation

◆ HerschelBulkley()

HerschelBulkley	(	const dictionary &	viscosityProperties,
		const Foam::viscosity &	viscosity,
		const volVectorField &	U
	)

Construct from components.

Definition at line 52 of file HerschelBulkley.C.

References strainRateViscosityModel::correct(), and HerschelBulkley::read().

Here is the call graph for this function:

◆ ~HerschelBulkley()

virtual ~HerschelBulkley ( )

inlinevirtual

Destructor.

Definition at line 104 of file HerschelBulkley.H.

Member Function Documentation

◆ TypeName()

TypeName ( "HerschelBulkley" )

Runtime type information.

◆ read()

bool read ( const dictionary & viscosityProperties )

virtual

Read transportProperties dictionary.

Implements generalisedNewtonianViscosityModel.

Definition at line 72 of file HerschelBulkley.C.

References Foam::dimKinematicViscosity, Foam::dimTime, dictionary::optionalSubDict(), Foam::pow(), generalisedNewtonianViscosityModel::read(), and dictionary::read().

Referenced by HerschelBulkley::HerschelBulkley().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ nu()

Foam::tmp< Foam::volScalarField > nu	(	const volScalarField &	nu0,
		const volScalarField &	strainRate
	)		const

virtual

Return the laminar viscosity.

Implements strainRateViscosityModel.

Definition at line 93 of file HerschelBulkley.C.

References Foam::dimless, Foam::dimTime, Foam::max(), Foam::min(), and Foam::pow().

Here is the call graph for this function:

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

src/MomentumTransportModels/momentumTransportModels/laminar/generalisedNewtonian/generalisedNewtonianViscosityModels/strainRateViscosityModels/HerschelBulkley/HerschelBulkley.H
src/MomentumTransportModels/momentumTransportModels/laminar/generalisedNewtonian/generalisedNewtonianViscosityModels/strainRateViscosityModels/HerschelBulkley/HerschelBulkley.C

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ HerschelBulkley()

◆ ~HerschelBulkley()

Member Function Documentation

◆ TypeName()

◆ read()

◆ nu()