flowRateOutletVelocityFvPatchVectorField Class Reference

Velocity outlet boundary condition which corrects the extrapolated velocity to match the specified flow rate. More...

Inheritance diagram for flowRateOutletVelocityFvPatchVectorField:

Collaboration diagram for flowRateOutletVelocityFvPatchVectorField:

Public Member Functions
	TypeName ("flowRateOutletVelocity")
	flowRateOutletVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &)
	flowRateOutletVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &, const dictionary &)
	flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &, const fvPatch &, const DimensionedField< vector, volMesh > &, const fvPatchFieldMapper &)
	flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &)
virtual tmp< fvPatchVectorField >	clone () const
	flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &, const DimensionedField< vector, volMesh > &)
virtual tmp< fvPatchVectorField >	clone (const DimensionedField< vector, volMesh > &iF) const
virtual void	updateCoeffs ()
virtual void	write (Ostream &) const

Detailed Description

Velocity outlet boundary condition which corrects the extrapolated velocity to match the specified flow rate.

For a mass-based flux:

• the flow rate should be provided in kg/s
• if rho is "none" the flow rate is in m^3/s
• otherwise rho should correspond to the name of the density field
• if the density field cannot be found in the database, the user must specify the outlet density using the rhoOutlet entry

For a volumetric-based flux:

• the flow rate is in m^3/s

Usage

Property	Description	Required	Default value
massFlowRate	mass flow rate [kg/s]	no
volumetricFlowRate	volumetric flow rate [m^3/s]	no
rho	density field name	no	rho
rhoOutlet	outlet density	no

Example of the boundary condition specification for a volumetric flow rate:

    <patchName>
    {
        type                flowRateOutletVelocity;
        volumetricFlowRate  0.2;
        value               uniform (0 0 0);
    }

Example of the boundary condition specification for a mass flow rate:

    <patchName>
    {
        type                flowRateOutletVelocity;
        massFlowRate        0.2;
        rhoOutlet           1.0;
        value               uniform (0 0 0);
    }

The flowRate entry is a Function1 of time, see Foam::Function1Types.

Note

• rhoOutlet is required for the case of a mass flow rate, where the density field is not available at start-up
• The value is positive out of the domain (as an outlet)
• May not work correctly for transonic outlets
• Strange behaviour with potentialFoam since the U equation is not solved

See also

Foam::fixedValueFvPatchField Foam::Function1Types Foam::flowRateInletVelocityFvPatchVectorField

Source files

• flowRateOutletVelocityFvPatchVectorField.H
• flowRateOutletVelocityFvPatchVectorField.C

Definition at line 130 of file flowRateOutletVelocityFvPatchVectorField.H.

Constructor & Destructor Documentation

flowRateOutletVelocityFvPatchVectorField() [1/5]

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

Definition at line 31 of file flowRateOutletVelocityFvPatchVectorField.C.

Referenced by flowRateOutletVelocityFvPatchVectorField::clone().

Here is the caller graph for this function:

flowRateOutletVelocityFvPatchVectorField() [2/5]

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

Definition at line 46 of file flowRateOutletVelocityFvPatchVectorField.C.

References dict, Foam::stringOps::evaluate(), Foam::exit(), Foam::FatalIOError, FatalIOErrorInFunction, Foam::New(), and p.

Here is the call graph for this function:

flowRateOutletVelocityFvPatchVectorField() [3/5]

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

Definition at line 92 of file flowRateOutletVelocityFvPatchVectorField.C.

flowRateOutletVelocityFvPatchVectorField() [4/5]

flowRateOutletVelocityFvPatchVectorField

(

const flowRateOutletVelocityFvPatchVectorField &

ptf

)

Definition at line 109 of file flowRateOutletVelocityFvPatchVectorField.C.

flowRateOutletVelocityFvPatchVectorField() [5/5]

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

Definition at line 123 of file flowRateOutletVelocityFvPatchVectorField.C.

Member Function Documentation

TypeName()

TypeName

(

"flowRateOutletVelocity"

)

clone() [1/2]

virtual tmp<fvPatchVectorField> clone ( ) const

inlinevirtual

Definition at line 197 of file flowRateOutletVelocityFvPatchVectorField.H.

References flowRateOutletVelocityFvPatchVectorField::flowRateOutletVelocityFvPatchVectorField().

Here is the call graph for this function:

clone() [2/2]

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

inlinevirtual

Definition at line 214 of file flowRateOutletVelocityFvPatchVectorField.H.

References flowRateOutletVelocityFvPatchVectorField::flowRateOutletVelocityFvPatchVectorField().

Here is the call graph for this function:

updateCoeffs()

void updateCoeffs ( )

virtual

Definition at line 180 of file flowRateOutletVelocityFvPatchVectorField.C.

References Foam::exit(), Foam::FatalError, FatalErrorInFunction, and Foam::foamVersion::patch.

Here is the call graph for this function:

write()

void write ( Ostream &  os ) const

virtual

Definition at line 220 of file flowRateOutletVelocityFvPatchVectorField.C.

References os(), fvPatchField::write(), and Ostream::writeEntryIfDifferent().

Here is the call graph for this function:

---

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

• src/finiteVolume/fields/fvPatchFields/derived/flowRateOutletVelocity/flowRateOutletVelocityFvPatchVectorField.H
• src/finiteVolume/fields/fvPatchFields/derived/flowRateOutletVelocity/flowRateOutletVelocityFvPatchVectorField.C