This fvModel applies an implicit forcing force to all components of the vector field to relax the field towards a specified uniform value. Its intended purpose is to damp the motions of an interface in the region approaching an outlet so that no reflections are generated. More...

Inheritance diagram for isotropicDamping:

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Collaboration diagram for isotropicDamping:

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

	isotropicDamping (const word &name, const word &modelType, const fvMesh &mesh, const dictionary &dict)
	Construct from components. More...

virtual	~isotropicDamping ()
	Destructor. More...

virtual wordList	addSupFields () const
	Return the list of fields for which the fvModel adds source term. More...

virtual void	addSup (fvMatrix< vector > &eqn, const word &fieldName) const
	Source term to momentum equation. More...

virtual void	addSup (const volScalarField &rho, fvMatrix< vector > &eqn, const word &fieldName) const
	Source term to compressible momentum equation. More...

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< vector > &eqn, const word &fieldName) const
	Source term to phase momentum equation. More...

virtual bool	movePoints ()
	Update for mesh motion. More...

virtual void	topoChange (const polyTopoChangeMap &)
	Update topology using the given map. More...

virtual void	mapMesh (const polyMeshMap &)
	Update from another mesh using the given map. More...

virtual void	distribute (const polyDistributionMap &)
	Redistribute or update using the given distribution map. More...

virtual bool	read (const dictionary &dict)
	Read dictionary. More...

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

	forcing (const word &name, const word &modelType, const fvMesh &mesh, const dictionary &dict)
	Construct from components. More...

virtual	~forcing ()
	Destructor. More...

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

	declareRunTimeSelectionTable (autoPtr, fvModel, dictionary,(const word &name, const word &modelType, const fvMesh &mesh, const dictionary &dict),(name, modelType, mesh, dict))

	fvModel (const word &name, const word &modelType, const fvMesh &mesh, const dictionary &dict)
	Construct from components. More...

autoPtr< fvModel >	clone () const
	Return clone. More...

virtual	~fvModel ()
	Destructor. More...

const word &	name () const
	Return const access to the source name. More...

const fvMesh &	mesh () const
	Return const access to the mesh database. More...

const dictionary &	coeffs () const
	Return dictionary. More...

virtual bool	addsSupToField (const word &fieldName) const
	Return true if the fvModel adds a source term to the given. More...

virtual scalar	maxDeltaT () const
	Return the maximum time-step for stable operation. More...

	FOR_ALL_FIELD_TYPES (DEFINE_FV_MODEL_ADD_SUP)
	Add a source term to an equation. More...

	FOR_ALL_FIELD_TYPES (DEFINE_FV_MODEL_ADD_RHO_SUP)
	Add a source term to a compressible equation. More...

	FOR_ALL_FIELD_TYPES (DEFINE_FV_MODEL_ADD_ALPHA_RHO_SUP)
	Add a source term to a phase equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const VolField< Type > &field) const
	Return source for an equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const VolField< Type > &field, const word &fieldName) const
	Return source for an equation with a specified name. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const volScalarField &rho, const VolField< Type > &field) const
	Return source for a compressible equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const volScalarField &rho, const VolField< Type > &field, const word &fieldName) const
	Return source for a compressible equation with a specified name. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const volScalarField &alpha, const volScalarField &rho, const VolField< Type > &field) const
	Return source for a phase equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const volScalarField &alpha, const volScalarField &rho, const VolField< Type > &field, const word &fieldName) const
	Return source for a phase equation with a specified name. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const volScalarField &alpha, const geometricOneField &rho, const VolField< Type > &field) const
	Return source for a phase equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const geometricOneField &alpha, const volScalarField &rho, const VolField< Type > &field) const
	Return source for a phase equation. More...

template<class Type >
tmp< fvMatrix< Type > >	source (const geometricOneField &alpha, const geometricOneField &rho, const VolField< Type > &field) const
	Return source for a phase equation. More...

template<class Type >
tmp< fvMatrix< Type > >	d2dt2 (const VolField< Type > &field) const
	Return source for an equation with a second time derivative. More...

template<class Type >
tmp< fvMatrix< Type > >	d2dt2 (const VolField< Type > &field, const word &fieldName) const
	Return source for an equation with a second time derivative. More...

virtual void	preUpdateMesh ()
	Prepare for mesh update. More...

virtual void	correct ()
	Correct the fvModel. More...

template<class Type , class AlphaRhoFieldType , class ... AlphaRhoFieldTypes>
Foam::dimensionSet	sourceDims (const VolField< Type > &field, const dimensionSet &ds, const AlphaRhoFieldType &alphaRho, const AlphaRhoFieldTypes &... alphaRhos)

template<class Type >
Foam::dimensionSet	sourceDims (const VolField< Type > &field, const dimensionSet &ds)

template<class Type , class ... AlphaRhoFieldTypes>
Foam::tmp< Foam::fvMatrix< Type > >	source (const VolField< Type > &field, const word &fieldName, const dimensionSet &ds, const AlphaRhoFieldTypes &... alphaRhos) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const VolField< Type > &field, const word &fieldName) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const volScalarField &rho, const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const volScalarField &rho, const VolField< Type > &field, const word &fieldName) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const volScalarField &alpha, const volScalarField &rho, const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const volScalarField &alpha, const volScalarField &rho, const VolField< Type > &field, const word &fieldName) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const geometricOneField &alpha, const geometricOneField &rho, const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const volScalarField &alpha, const geometricOneField &rho, const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	source (const geometricOneField &alpha, const volScalarField &rho, const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	d2dt2 (const VolField< Type > &field) const

template<class Type >
Foam::tmp< Foam::fvMatrix< Type > >	d2dt2 (const VolField< Type > &field, const word &fieldName) const

Additional Inherited Members
Static Public Member Functions inherited from fvModel
template<class Type , class AlphaRhoFieldType , class ... AlphaRhoFieldTypes>
static dimensionSet	sourceDims (const VolField< Type > &field, const dimensionSet &ds, const AlphaRhoFieldType &alphaRho, const AlphaRhoFieldTypes &... alphaRhos)
	Return the dimensions of the matrix of a source term. More...

template<class Type >
static dimensionSet	sourceDims (const VolField< Type > &field, const dimensionSet &ds)
	Return the dimensions of the matrix of a source term (base. More...

static autoPtr< fvModel >	New (const word &name, const fvMesh &mesh, const dictionary &dict)
	Return a reference to the selected fvModel. More...

Protected Member Functions inherited from forcing
void	readCoeffs ()
	Non-virtual read. More...

tmp< volScalarField::Internal >	scale () const
	Return the scale distribution. More...

tmp< volScalarField::Internal >	forceCoeff (const volScalarField::Internal &scale) const
	Return the force coefficient given the scale distribution. More...

tmp< volScalarField::Internal >	forceCoeff () const
	Return the force coefficient. More...

Protected Member Functions inherited from fvModel
template<class Type >
void	addSupType (fvMatrix< Type > &eqn, const word &fieldName) const
	Add a source term to an equation. More...

template<class Type >
void	addSupType (const volScalarField &rho, fvMatrix< Type > &eqn, const word &fieldName) const
	Add a source term to a compressible equation. More...

template<class Type >
void	addSupType (const volScalarField &alpha, const volScalarField &rho, fvMatrix< Type > &eqn, const word &fieldName) const
	Add a source term to a phase equation. More...

template<class Type , class ... AlphaRhoFieldTypes>
tmp< fvMatrix< Type > >	source (const VolField< Type > &field, const word &fieldName, const dimensionSet &ds, const AlphaRhoFieldTypes &... alphaRhos) const
	Return source for equation with specified name and dimensions. More...

Protected Attributes inherited from forcing
dimensionedScalar	lambda_
	Damping coefficient [1/s]. More...

dimensionedScalar	lambdaBoundary_
	Optional boundary damping coefficient [1/s]. More...

autoPtr< Function1< scalar > >	scale_
	The scaling function. More...

vectorField	origins_
	Origins of the scaling coordinate. More...

vectorField	directions_
	Directions of increasing scaling coordinate. More...

Detailed Description

This fvModel applies an implicit forcing force to all components of the vector field to relax the field towards a specified uniform value. Its intended purpose is to damp the motions of an interface in the region approaching an outlet so that no reflections are generated.

The forcing force coefficient $\lambda$ should be set based on the desired level of forcing and the residence time of a perturbation through the forcing zone. For example, if waves moving at 2 [m/s] are travelling through a forcing zone 8 [m] in length, then the residence time is 4 [s]. If it is deemed necessary to damp for 5 time-scales, then $\lambda$ should be set to equal 5/(4 [s]) = 1.2 [1/s].

Usage

Example usage:

isotropicDamping1
{
    type            isotropicDamping;

    libs            ("libwaves.so");

    // Define the line along which to apply the graduation
    origin          (1200 0 0);
    direction       (1 0 0);

    // // Or, define multiple lines
    // origins         ((1200 0 0) (1200 -300 0) (1200 300 0));
    // directions      ((1 0 0) (0 -1 0) (0 1 0));

    scale
    {
        type        halfCosineRamp;
        start       0;
        duration    600;
    }

    value           (2 0 0);            // Value towards which the field is
                                        // relaxed
    lambda          [0 0 -1 0 0 0 0] 1; // Damping coefficient
}

See also: Foam::fv::forcing Foam::fv::verticalDamping

Source files

Definition at line 94 of file isotropicDamping.H.

Constructor & Destructor Documentation

◆ isotropicDamping()

isotropicDamping	(	const word &	name,
		const word &	modelType,
		const fvMesh &	mesh,
		const dictionary &	dict
	)

Construct from components.

Definition at line 70 of file isotropicDamping.C.

◆ ~isotropicDamping()

virtual ~isotropicDamping ( )

inlinevirtual

Destructor.

Definition at line 139 of file isotropicDamping.H.

Member Function Documentation

◆ TypeName()

TypeName ( "isotropicDamping" )

Runtime type information.

◆ addSupFields()

Foam::wordList addSupFields ( ) const

virtual

Return the list of fields for which the fvModel adds source term.

to the transport equation

Reimplemented from fvModel.

Definition at line 88 of file isotropicDamping.C.

◆ addSup() [1/3]

void addSup	(	fvMatrix< vector > &	eqn,
		const word &	fieldName
	)		const

virtual

Source term to momentum equation.

Definition at line 94 of file isotropicDamping.C.

References Foam::add().

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◆ addSup() [2/3]

void addSup	(	const volScalarField &	rho,
		fvMatrix< vector > &	eqn,
		const word &	fieldName
	)		const

virtual

Source term to compressible momentum equation.

Definition at line 104 of file isotropicDamping.C.

References Foam::add(), and rho.

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◆ addSup() [3/3]

void addSup	(	const volScalarField &	alpha,
		const volScalarField &	rho,
		fvMatrix< vector > &	eqn,
		const word &	fieldName
	)		const

virtual

Source term to phase momentum equation.

Definition at line 115 of file isotropicDamping.C.

References Foam::add(), alpha(), and rho.

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◆ movePoints()

bool movePoints ( )

virtual

Update for mesh motion.

Implements fvModel.

Definition at line 127 of file isotropicDamping.C.

◆ topoChange()

void topoChange ( const polyTopoChangeMap & )

virtual

Update topology using the given map.

Implements fvModel.

Definition at line 133 of file isotropicDamping.C.

◆ mapMesh()

void mapMesh ( const polyMeshMap & map )

virtual

Update from another mesh using the given map.

Implements fvModel.

Definition at line 137 of file isotropicDamping.C.

◆ distribute()

void distribute ( const polyDistributionMap & )

virtual

Redistribute or update using the given distribution map.

Implements fvModel.

Definition at line 141 of file isotropicDamping.C.

◆ read()

bool read ( const dictionary & dict )

virtual

Read dictionary.

Reimplemented from forcing.

Definition at line 145 of file isotropicDamping.C.

References dict, and forcing::read().

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

src/waves/fvModels/isotropicDamping/isotropicDamping.H
src/waves/fvModels/isotropicDamping/isotropicDamping.C

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ isotropicDamping()

◆ ~isotropicDamping()

Member Function Documentation

◆ TypeName()

◆ addSupFields()

◆ addSup() [1/3]

◆ addSup() [2/3]

◆ addSup() [3/3]

◆ movePoints()

◆ topoChange()

◆ mapMesh()

◆ distribute()

◆ read()