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totalPressureFvPatchScalarField Class Reference
Boundary conditions » InletBoundary conditions » | Outlet

This boundary condition provides a total pressure condition. Four variants are possible: More...

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Public Member Functions

 TypeName ("totalPressure")
 Runtime type information. More...
 
 totalPressureFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
 Construct from patch and internal field. More...
 
 totalPressureFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
 Construct from patch, internal field and dictionary. More...
 
 totalPressureFvPatchScalarField (const this_bctype &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
 Construct by mapping onto a new patch. More...
 
 totalPressureFvPatchScalarField (const this_bctype &, const DimensionedField< scalar, volMesh > &)
 Construct as copy setting internal field reference. More...
 
 totalPressureFvPatchScalarField (const this_bctype &)=delete
 No copy without an internal field. More...
 
virtual tmp< fvPatchField< scalar > > clone (const DimensionedField< scalar, volMesh > &iF) const
 Clone with an internal field reference. More...
 
const word & UName () const
 Return the name of the velocity field. More...
 
word & UName ()
 Return reference to the name of the velocity field. More...
 
const word & phiName () const
 Return the name of the flux field. More...
 
word & phiName ()
 Return reference to the name of the flux field. More...
 
const word & rhoName () const
 Return the name of the density field. More...
 
word & rhoName ()
 Return reference to the name of the density field. More...
 
const word & psiName () const
 Return the name of the compressibility field. More...
 
word & psiName ()
 Return reference to the name of the compressibility field. More...
 
scalar gamma () const
 Return the heat capacity ratio. More...
 
scalar & gamma ()
 Return reference to the heat capacity ratio to allow adjustment. More...
 
const scalarField & p0 () const
 Return the total pressure. More...
 
scalarField & p0 ()
 Return reference to the total pressure to allow adjustment. More...
 
virtual void autoMap (const fvPatchFieldMapper &)
 Map (and resize as needed) from self given a mapping object. More...
 
virtual void rmap (const fvPatchScalarField &, const labelList &)
 Reverse map the given fvPatchField onto this fvPatchField. More...
 
virtual void updateCoeffs (const scalarField &p0p, const vectorField &Up)
 Update the coefficients associated with the patch field using the given patch total pressure and velocity fields. 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 provides a total pressure condition. Four variants are possible:

1. incompressible subsonic:

\[ p_p = p_0 - 0.5 |U|^2 \]

where

$ p_p $ = incompressible pressure at patch [m2/s2]
$ p_0 $ = incompressible total pressure [m2/s2]
$ U $ = velocity

2. compressible subsonic:

\[ p_p = p_0 - 0.5 \rho |U|^2 \]

where

$ p_p $ = pressure at patch [Pa]
$ p_0 $ = total pressure [Pa]
$ \rho $ = density [kg/m3]
$ U $ = velocity

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

\[ p_p = \frac{p_0}{1 + 0.5 \psi |U|^2} \]

where

$ p_p $ = pressure at patch [Pa]
$ p_0 $ = total pressure [Pa]
$ G $ = coefficient given by $\frac{\gamma}{1-\gamma}$

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

\[ p_p = \frac{p_0}{(1 + 0.5 \psi G |U|^2)^{\frac{1}{G}}} \]

where

$ p_p $ = pressure at patch [Pa]
$ p_0 $ = total pressure [Pa]
$ \gamma $ = ratio of specific heats (Cp/Cv)
$ \psi $ = compressibility [m2/s2]
$ G $ = coefficient given by $\frac{\gamma}{1-\gamma}$

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 Total pressure yes

Example of the boundary condition specification: 

    <patchName>
    {
        type            totalPressure;
        p0              uniform 1e5;
    }
See also
Foam::fixedValueFvPatchField
Source files

Definition at line 252 of file totalPressureFvPatchScalarField.H.

Constructor & Destructor Documentation

◆ totalPressureFvPatchScalarField() [1/5]

totalPressureFvPatchScalarField ( const fvPatch &  ,
const DimensionedField< scalar, volMesh > &   
)

Construct from patch and internal field.

◆ totalPressureFvPatchScalarField() [2/5]

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

Construct from patch, internal field and dictionary.

◆ totalPressureFvPatchScalarField() [3/5]

totalPressureFvPatchScalarField ( const this_bctype &  ,
const fvPatch &  ,
const DimensionedField< scalar, volMesh > &  ,
const fvPatchFieldMapper &   
)

Construct by mapping onto a new patch.

◆ totalPressureFvPatchScalarField() [4/5]

totalPressureFvPatchScalarField ( const this_bctype &  ,
const DimensionedField< scalar, volMesh > &   
)

Construct as copy setting internal field reference.

◆ totalPressureFvPatchScalarField() [5/5]

totalPressureFvPatchScalarField ( const this_bctype &  )
delete

No copy without an internal field.

Member Function Documentation

◆ TypeName()

TypeName ( "totalPressure"  )

Runtime type information.

◆ clone()

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

Clone with an internal field reference.

Reimplemented in fanPressureFvPatchScalarField, and rotatingTotalPressureFvPatchScalarField.

Definition at line 351 of file totalPressureFvPatchScalarField.H.

References fvPatchField< Type >::Clone().

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◆ UName() [1/2]

const word& UName ( ) const
inline

Return the name of the velocity field.

Definition at line 366 of file totalPressureFvPatchScalarField.H.

◆ UName() [2/2]

word& UName ( )
inline

Return reference to the name of the velocity field.

to allow adjustment

Definition at line 376 of file totalPressureFvPatchScalarField.H.

◆ phiName() [1/2]

const word& phiName ( ) const
inline

Return the name of the flux field.

Definition at line 384 of file totalPressureFvPatchScalarField.H.

◆ phiName() [2/2]

word& phiName ( )
inline

Return reference to the name of the flux field.

to allow adjustment

Definition at line 394 of file totalPressureFvPatchScalarField.H.

◆ rhoName() [1/2]

const word& rhoName ( ) const
inline

Return the name of the density field.

Definition at line 402 of file totalPressureFvPatchScalarField.H.

◆ rhoName() [2/2]

word& rhoName ( )
inline

Return reference to the name of the density field.

to allow adjustment

Definition at line 412 of file totalPressureFvPatchScalarField.H.

◆ psiName() [1/2]

const word& psiName ( ) const
inline

Return the name of the compressibility field.

Definition at line 420 of file totalPressureFvPatchScalarField.H.

◆ psiName() [2/2]

word& psiName ( )
inline

Return reference to the name of the compressibility field.

to allow adjustment

Definition at line 430 of file totalPressureFvPatchScalarField.H.

◆ gamma() [1/2]

scalar gamma ( ) const
inline

Return the heat capacity ratio.

Definition at line 438 of file totalPressureFvPatchScalarField.H.

◆ gamma() [2/2]

scalar& gamma ( )
inline

Return reference to the heat capacity ratio to allow adjustment.

Definition at line 446 of file totalPressureFvPatchScalarField.H.

◆ p0() [1/2]

const scalarField& p0 ( ) const
inline

Return the total pressure.

Definition at line 454 of file totalPressureFvPatchScalarField.H.

◆ p0() [2/2]

scalarField& p0 ( )
inline

Return reference to the total pressure to allow adjustment.

Definition at line 462 of file totalPressureFvPatchScalarField.H.

◆ autoMap()

virtual void autoMap ( const fvPatchFieldMapper &  )
virtual

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

◆ rmap()

virtual void rmap ( const fvPatchScalarField &  ,
const labelList &   
)
virtual

Reverse map the given fvPatchField onto this fvPatchField.

◆ updateCoeffs() [1/2]

virtual void updateCoeffs ( const scalarField &  p0p,
const vectorField &  Up 
)
virtual

Update the coefficients associated with the patch field using the given patch total pressure and velocity fields.

◆ updateCoeffs() [2/2]

virtual void updateCoeffs ( )
virtual

Update the coefficients associated with the patch field.

Reimplemented in fanPressureFvPatchScalarField, and rotatingTotalPressureFvPatchScalarField.

◆ write()

virtual void write ( Ostream &  ) const
virtual

Write.

Reimplemented in fanPressureFvPatchScalarField, and rotatingTotalPressureFvPatchScalarField.

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