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flowRateOutletVelocityFvPatchVectorField Class Reference
Boundary conditions » Outlet

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

#include <flowRateOutletVelocityFvPatchVectorField.H>

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Public Member Functions

 TypeName ("flowRateOutletVelocity")
 Runtime type information.
 flowRateOutletVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &)
 Construct from patch and internal field.
 flowRateOutletVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &, const dictionary &)
 Construct from patch, internal field and dictionary.
 flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &, const fvPatch &, const DimensionedField< vector, volMesh > &, const fvPatchFieldMapper &)
 Construct by mapping given.
 flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &)
 Construct as copy.
 flowRateOutletVelocityFvPatchVectorField (const flowRateOutletVelocityFvPatchVectorField &, const DimensionedField< vector, volMesh > &)
 Construct as copy setting internal field reference.
virtual tmp< fvPatchField< vector > > clone () const
 Return a clone.
virtual tmp< fvPatchField< vector > > clone (const DimensionedField< vector, volMesh > &iF) const
 Clone with an internal field reference.
virtual void updateCoeffs ()
 Update the coefficients associated with the patch field.
virtual void write (Ostream &) const
 Write.

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

Definition at line 130 of file flowRateOutletVelocityFvPatchVectorField.H.

Constructor & Destructor Documentation

◆ flowRateOutletVelocityFvPatchVectorField() [1/5]

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

Construct from patch and internal field.

Definition at line 29 of file flowRateOutletVelocityFvPatchVectorField.C.

References p.

Referenced by flowRateOutletVelocityFvPatchVectorField(), flowRateOutletVelocityFvPatchVectorField(), flowRateOutletVelocityFvPatchVectorField(), and TypeName().

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◆ flowRateOutletVelocityFvPatchVectorField() [2/5]

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

Construct from patch, internal field and dictionary.

Definition at line 44 of file flowRateOutletVelocityFvPatchVectorField.C.

References UPstream::buffered, dict, Foam::exit(), Foam::FatalIOError, FatalIOErrorInFunction, Function1< Type >::NewIfPresent(), Foam::nl, and p.

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◆ flowRateOutletVelocityFvPatchVectorField() [3/5]

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

Construct by mapping given.

flowRateOutletVelocityFvPatchVectorField onto a new patch

Definition at line 88 of file flowRateOutletVelocityFvPatchVectorField.C.

References clone(), flowRateOutletVelocityFvPatchVectorField(), and p.

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◆ flowRateOutletVelocityFvPatchVectorField() [4/5]

flowRateOutletVelocityFvPatchVectorField ( const flowRateOutletVelocityFvPatchVectorField & ptf)

Construct as copy.

Definition at line 105 of file flowRateOutletVelocityFvPatchVectorField.C.

References clone(), and flowRateOutletVelocityFvPatchVectorField().

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◆ flowRateOutletVelocityFvPatchVectorField() [5/5]

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

Construct as copy setting internal field reference.

Definition at line 119 of file flowRateOutletVelocityFvPatchVectorField.C.

References clone(), and flowRateOutletVelocityFvPatchVectorField().

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Member Function Documentation

◆ TypeName()

TypeName ( "flowRateOutletVelocity" )

Runtime type information.

References flowRateOutletVelocityFvPatchVectorField().

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◆ clone() [1/2]

virtual tmp< fvPatchField< vector > > clone ( ) const
inlinevirtual

Return a clone.

Definition at line 229 of file flowRateOutletVelocityFvPatchVectorField.H.

References fvPatchField< Type >::Clone().

Referenced by flowRateOutletVelocityFvPatchVectorField(), flowRateOutletVelocityFvPatchVectorField(), and flowRateOutletVelocityFvPatchVectorField().

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◆ clone() [2/2]

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

Clone with an internal field reference.

Definition at line 237 of file flowRateOutletVelocityFvPatchVectorField.H.

References fvPatchField< Type >::Clone().

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◆ updateCoeffs()

void updateCoeffs ( )
virtual

Update the coefficients associated with the patch field.

Definition at line 178 of file flowRateOutletVelocityFvPatchVectorField.C.

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

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◆ write()

void write ( Ostream & os) const
virtual

Write.

Definition at line 219 of file flowRateOutletVelocityFvPatchVectorField.C.

References os(), fvPatchField< Type >::write(), and fvPatchField< Type >::writeValueEntry().

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