This boundary condition is applied to the flow velocity, to simulate the opening or closure of a baffle due to local pressure or force changes, by merging the behaviours of wall and cyclic conditions. More...

Inheritance diagram for activePressureForceBaffleVelocityFvPatchVectorField:

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Collaboration diagram for activePressureForceBaffleVelocityFvPatchVectorField:

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

	activePressureForceBaffleVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &)
	Construct from patch and internal field. More...

	activePressureForceBaffleVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &, const dictionary &)
	Construct from patch, internal field and dictionary. More...

	activePressureForceBaffleVelocityFvPatchVectorField (const activePressureForceBaffleVelocityFvPatchVectorField &, const fvPatch &, const DimensionedField< vector, volMesh > &, const fvPatchFieldMapper &)
	Construct by mapping. More...

	activePressureForceBaffleVelocityFvPatchVectorField (const activePressureForceBaffleVelocityFvPatchVectorField &)=delete
	Disallow copy without setting internal field reference. More...

	activePressureForceBaffleVelocityFvPatchVectorField (const activePressureForceBaffleVelocityFvPatchVectorField &, const DimensionedField< vector, volMesh > &)
	Copy constructor setting internal field reference. More...

virtual tmp< fvPatchVectorField >	clone (const DimensionedField< vector, volMesh > &iF) const
	Construct and return a clone setting internal field reference. More...

virtual void	autoMap (const fvPatchFieldMapper &)
	Map (and resize as needed) from self given a mapping object. More...

virtual void	rmap (const fvPatchVectorField &, const labelList &)
	Reverse map the given fvPatchField onto this fvPatchField. More...

virtual void	updateCoeffs ()
	Update the coefficients associated with the patch field. More...

virtual void	write (Ostream &) const
	Write. More...

Detailed Description

This boundary condition is applied to the flow velocity, to simulate the opening or closure of a baffle due to local pressure or force changes, by merging the behaviours of wall and cyclic conditions.

The baffle joins two mesh regions, where the open fraction determines the interpolation weights applied to each cyclic- and neighbour-patch contribution. This means that this is boundary condition is meant to be used in an extra wall beyond an existing cyclic patch pair. See PDRMesh for more details.

Once the threshold is crossed, this condition activated and continues to open or close at a fixed rate using

$x = x_{old} + s \times \frac{dt}{DT}$

where

	=	baffle open fraction [0-1]
$x_{old}$	=	baffle open fraction on previous evaluation
	=	sign for orientation: 1 to open or -1 to close
	=	simulation time step
	=	time taken to open the baffle

The open fraction is then applied to scale the patch areas.

Usage

Property	Description	Required	Default value
`p`	pressure field name	no	p
`cyclicPatch`	cyclic patch name	yes
`orientation`	1 to open or -1 to close	yes
`openFraction`	current open fraction [0-1]	yes
`openingTime`	time taken to open or close the baffle	yes
`maxOpenFractionDelta`	max fraction change per timestep	yes
`minThresholdValue`	minimum absolute pressure or
`force` difference for activation	yes
`forceBased`	force (true) or pressure-based (false) activation	yes

Example of the boundary condition specification:

    <patchName>
    {
        type            activePressureForceBaffleVelocity;
        p               p;
        cyclicPatch     cyclic1;
        orientation     1;
        openFraction    0.2;
        openingTime     5.0;
        maxOpenFractionDelta 0.1;
        minThresholdValue 0.01;
        forceBased      false;
    }

Source files

Definition at line 173 of file activePressureForceBaffleVelocityFvPatchVectorField.H.

Constructor & Destructor Documentation

◆ activePressureForceBaffleVelocityFvPatchVectorField() [1/5]

activePressureForceBaffleVelocityFvPatchVectorField	(	const fvPatch &	p,
		const DimensionedField< vector, volMesh > &	iF
	)

Construct from patch and internal field.

Definition at line 36 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

Referenced by activePressureForceBaffleVelocityFvPatchVectorField::activePressureForceBaffleVelocityFvPatchVectorField(), and activePressureForceBaffleVelocityFvPatchVectorField::clone().

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◆ activePressureForceBaffleVelocityFvPatchVectorField() [2/5]

activePressureForceBaffleVelocityFvPatchVectorField	(	const fvPatch &	p,
		const DimensionedField< vector, volMesh > &	iF,
		const dictionary &	dict
	)

Construct from patch, internal field and dictionary.

Definition at line 61 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

References activePressureForceBaffleVelocityFvPatchVectorField::activePressureForceBaffleVelocityFvPatchVectorField(), fvPatch::boundaryMesh(), dictionary::found(), dictionary::lookup(), fvPatch::Sf(), fvPatch::size(), and Foam::Zero.

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◆ activePressureForceBaffleVelocityFvPatchVectorField() [3/5]

activePressureForceBaffleVelocityFvPatchVectorField	(	const activePressureForceBaffleVelocityFvPatchVectorField &	ptf,
		const fvPatch &	p,
		const DimensionedField< vector, volMesh > &	iF,
		const fvPatchFieldMapper &	mapper
	)

Construct by mapping.

Definition at line 104 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

References activePressureForceBaffleVelocityFvPatchVectorField::activePressureForceBaffleVelocityFvPatchVectorField().

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◆ activePressureForceBaffleVelocityFvPatchVectorField() [4/5]

activePressureForceBaffleVelocityFvPatchVectorField ( const activePressureForceBaffleVelocityFvPatchVectorField & )

delete

Disallow copy without setting internal field reference.

◆ activePressureForceBaffleVelocityFvPatchVectorField() [5/5]

activePressureForceBaffleVelocityFvPatchVectorField	(	const activePressureForceBaffleVelocityFvPatchVectorField &	ptf,
		const DimensionedField< vector, volMesh > &	iF
	)

Copy constructor setting internal field reference.

Definition at line 131 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

References activePressureForceBaffleVelocityFvPatchVectorField::autoMap().

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Member Function Documentation

◆ TypeName()

TypeName ( "activePressureForceBaffleVelocity" )

Runtime type information.

◆ clone()

virtual tmp<fvPatchVectorField> clone ( const DimensionedField< vector, volMesh > & iF ) const

inlinevirtual

Construct and return a clone setting internal field reference.

Definition at line 271 of file activePressureForceBaffleVelocityFvPatchVectorField.H.

References activePressureForceBaffleVelocityFvPatchVectorField::activePressureForceBaffleVelocityFvPatchVectorField(), activePressureForceBaffleVelocityFvPatchVectorField::autoMap(), activePressureForceBaffleVelocityFvPatchVectorField::rmap(), activePressureForceBaffleVelocityFvPatchVectorField::updateCoeffs(), and activePressureForceBaffleVelocityFvPatchVectorField::write().

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◆ autoMap()

void autoMap ( const fvPatchFieldMapper & m )

virtual

Map (and resize as needed) from self given a mapping object.

Used to update fields following mesh topology change

Note: cannot map field from cyclic patch anyway so just recalculate

Areas should be consistent when doing autoMap except in case of topo changes. ! Note: we don't want to use Sf here since triggers rebuilding of /*! fvMesh::S() which will give problems when mapped (since already on new mesh)

Definition at line 157 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

Referenced by activePressureForceBaffleVelocityFvPatchVectorField::activePressureForceBaffleVelocityFvPatchVectorField(), and activePressureForceBaffleVelocityFvPatchVectorField::clone().

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◆ rmap()

void rmap	(	const fvPatchVectorField &	ptf,
		const labelList &	addr
	)

virtual

Reverse map the given fvPatchField onto this fvPatchField.

Used to reconstruct fields

Definition at line 195 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

Referenced by activePressureForceBaffleVelocityFvPatchVectorField::clone().

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◆ updateCoeffs()

void updateCoeffs ( )

virtual

Update the coefficients associated with the patch field.

Definition at line 219 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

Referenced by activePressureForceBaffleVelocityFvPatchVectorField::clone().

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◆ write()

void write ( Ostream & os ) const

virtual

Write.

Definition at line 330 of file activePressureForceBaffleVelocityFvPatchVectorField.C.

Referenced by activePressureForceBaffleVelocityFvPatchVectorField::clone().

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

src/finiteVolume/fields/fvPatchFields/derived/activePressureForceBaffleVelocity/activePressureForceBaffleVelocityFvPatchVectorField.H
src/finiteVolume/fields/fvPatchFields/derived/activePressureForceBaffleVelocity/activePressureForceBaffleVelocityFvPatchVectorField.C

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ activePressureForceBaffleVelocityFvPatchVectorField() [1/5]

◆ activePressureForceBaffleVelocityFvPatchVectorField() [2/5]

◆ activePressureForceBaffleVelocityFvPatchVectorField() [3/5]

◆ activePressureForceBaffleVelocityFvPatchVectorField() [4/5]

◆ activePressureForceBaffleVelocityFvPatchVectorField() [5/5]

Member Function Documentation

◆ TypeName()

◆ clone()

◆ autoMap()

◆ rmap()

◆ updateCoeffs()

◆ write()