Inflow, outflow and entrainment pressure boundary condition based on a constant total pressure assumption. More...

Inheritance diagram for totalPressureFvPatchScalarField:

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Collaboration diagram for totalPressureFvPatchScalarField:

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

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

	totalPressureFvPatchScalarField (const totalPressureFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
	Construct by mapping given totalPressureFvPatchScalarField. More...

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

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

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

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

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

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

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

	dynamicPressureFvPatchScalarField (const dynamicPressureFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
	Construct by mapping given dynamicPressureFvPatchScalarField. More...

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

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

virtual void	map (const fvPatchScalarField &, const fvPatchFieldMapper &)
	Map the given fvPatchField onto this fvPatchField. More...

virtual void	reset (const fvPatchScalarField &)
	Reset the fvPatchField to the given fvPatchField. More...

Protected Attributes
const word	UName_
	Name of the velocity field. More...

const word	phiName_
	Name of the flux field. More...

Protected Attributes inherited from dynamicPressureFvPatchScalarField
const word	rhoName_
	Name of the density field used to normalise the mass flux. More...

const word	psiName_
	Name of the compressibility field used to calculate the wave speed. More...

const scalar	gamma_
	Heat capacity ratio. More...

scalarField	p0_
	Reference pressure. More...

Additional Inherited Members
Protected Member Functions inherited from dynamicPressureFvPatchScalarField
void	updateCoeffs (const scalarField &p0p, const scalarField &K0mKp)
	Update the coefficients associated with the patch field. More...

Detailed Description

Inflow, outflow and entrainment pressure boundary condition based on a constant total pressure assumption.

For outflow the patch pressure is set to the external static pressure.

For inflow the patch pressure is evaluated from the patch velocity and the external total pressure obtained from the external static pressure p_0 and external velocity U_0 which is looked-up from the the optional tangentialVelocity entry in the pressureInletOutletVelocity velocity boundary condition for the patch if that boundary condition is used, otherwise U_0 is assumed zero and the external total pressure is equal to the external static pressure.

The patch pressure is evaluated from the external conditions using one of the following expressions depending on the flow conditions and specification of compressibility:

1. incompressible subsonic:

$p_p = p_0 + 0.5 |U_0|^2 - 0.5 |U|^2$

where

	=	pressure at patch [m^2/s^2]
	=	external static pressure [m^2/s^2]
	=	velocity [m/s]
	=	external velocity [m/s]

2. compressible subsonic:

$p_p = p_0 + \rho (0.5 |U_0|^2 - 0.5 |U|^2)$

where

	=	pressure at patch [Pa]
	=	external static pressure [Pa]
$\rho$	=	density [kg/m^3]
	=	velocity [m/s]
	=	external velocity [m/s]

3. compressible transonic ( $\gamma = 1$ ):

$p_p = \frac{p_0}{1 + \psi (0.5 |U|^2 - 0.5 |U_0|^2)}$

where

	=	pressure at patch [Pa]
	=	external static pressure [Pa]
$\psi$	=	compressibility [m^2/s^2]
$\rho$	=	density [kg/m^3]
	=	velocity [m/s]
	=	external velocity [m/s]

4. compressible supersonic ( $\gamma > 1$ ):

$p_p = \frac{p_0} {(1 + G \psi (0.5 |U|^2 - 0.5 |U_0|^2))^{\frac{1}{G}}}$

where

	=	pressure at patch [Pa]
	=	external static pressure [Pa]
$\psi$	=	compressibility [m^2/s^2]
$\rho$	=	density [kg/m^3]
	=	coefficient given by $\frac{\gamma}{1-\gamma}$ []
$\gamma$	=	ratio of specific heats (Cp/Cv) []
	=	velocity [m/s]
	=	external velocity [m/s]

The modes of operation are set by the dimensions of the pressure field to which this boundary condition is applied, the psi entry and the value of gamma:

Mode	dimensions	psi	gamma
`incompressible` subsonic	p/rho
`compressible` subsonic	p	none
`compressible` transonic	p	psi	1
`compressible` supersonic	p	psi	> 1

Usage

Property	Description	Required	Default value
`U`	Velocity field name	no	U
`phi`	Flux field name	no	phi
`rho`	Density field name	no	rho
`psi`	Compressibility field name	no	none
`gamma`	(Cp/Cv)	no	1
`p0`	External pressure	yes

Example of the boundary condition specification:

    <patchName>
    {
        type            totalPressure;
        p0              uniform 1e5;
    }

See also: Foam::dynamicPressureFvPatchScalarField Foam::fixedValueFvPatchField Foam::pressureInletOutletVelocityFvPatchVectorField

Source files

Definition at line 307 of file totalPressureFvPatchScalarField.H.

Constructor & Destructor Documentation

◆ totalPressureFvPatchScalarField() [1/4]

totalPressureFvPatchScalarField	(	const fvPatch &	p,
		const DimensionedField< scalar, volMesh > &	iF,
		const dictionary &	dict
	)

Construct from patch, internal field and dictionary.

Definition at line 35 of file totalPressureFvPatchScalarField.C.

Referenced by totalPressureFvPatchScalarField::clone().

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◆ totalPressureFvPatchScalarField() [2/4]

totalPressureFvPatchScalarField	(	const totalPressureFvPatchScalarField &	ptf,
		const fvPatch &	p,
		const DimensionedField< scalar, volMesh > &	iF,
		const fvPatchFieldMapper &	mapper
	)

Construct by mapping given totalPressureFvPatchScalarField.

onto a new patch

Definition at line 48 of file totalPressureFvPatchScalarField.C.

◆ totalPressureFvPatchScalarField() [3/4]

totalPressureFvPatchScalarField ( const totalPressureFvPatchScalarField & )

delete

Disallow copy without setting internal field reference.

◆ totalPressureFvPatchScalarField() [4/4]

totalPressureFvPatchScalarField	(	const totalPressureFvPatchScalarField &	tppsf,
		const DimensionedField< scalar, volMesh > &	iF
	)

Copy constructor setting internal field reference.

Definition at line 62 of file totalPressureFvPatchScalarField.C.

Member Function Documentation

◆ TypeName()

TypeName ( "totalPressure" )

Runtime type information.

◆ clone()

virtual tmp<fvPatchScalarField> clone ( const DimensionedField< scalar, volMesh > & iF ) const

inlinevirtual

Construct and return a clone setting internal field reference.

Reimplemented in rotatingTotalPressureFvPatchScalarField, and fanPressureFvPatchScalarField.

Definition at line 362 of file totalPressureFvPatchScalarField.H.

References totalPressureFvPatchScalarField::totalPressureFvPatchScalarField().

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◆ updateCoeffs()

void updateCoeffs ( )

virtual

Update the coefficients associated with the patch field.

Reimplemented in rotatingTotalPressureFvPatchScalarField, and fanPressureFvPatchScalarField.

Definition at line 76 of file totalPressureFvPatchScalarField.C.

References Foam::magSqr(), Foam::neg(), pressureInletOutletVelocityFvPatchVectorField::tangentialVelocity(), and dynamicPressureFvPatchScalarField::updateCoeffs().

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◆ write()

void write ( Ostream & os ) const

virtual

Write.

Reimplemented from dynamicPressureFvPatchScalarField.

Reimplemented in rotatingTotalPressureFvPatchScalarField, and fanPressureFvPatchScalarField.

Definition at line 112 of file totalPressureFvPatchScalarField.C.

References dynamicPressureFvPatchScalarField::write().

Referenced by fanPressureFvPatchScalarField::write(), and rotatingTotalPressureFvPatchScalarField::write().

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Member Data Documentation

◆ UName_

const word UName_

protected

Name of the velocity field.

Definition at line 316 of file totalPressureFvPatchScalarField.H.

◆ phiName_

const word phiName_

protected

Name of the flux field.

Definition at line 319 of file totalPressureFvPatchScalarField.H.

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

src/finiteVolume/fields/fvPatchFields/derived/totalPressure/totalPressureFvPatchScalarField.H
src/finiteVolume/fields/fvPatchFields/derived/totalPressure/totalPressureFvPatchScalarField.C

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ totalPressureFvPatchScalarField() [1/4]

◆ totalPressureFvPatchScalarField() [2/4]

◆ totalPressureFvPatchScalarField() [3/4]

◆ totalPressureFvPatchScalarField() [4/4]

Member Function Documentation

◆ TypeName()

◆ clone()

◆ updateCoeffs()

◆ write()

Member Data Documentation

◆ UName_

◆ phiName_