Includes tools to manipulate the pressure into different forms. More...

Inheritance diagram for pressure:

Collaboration diagram for pressure:

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

	pressure (const word &name, const Time &runTime, const dictionary &)
	Construct from Time and dictionary. More...

virtual	~pressure ()
	Destructor. More...

virtual bool	read (const dictionary &)
	Read the pressure data. More...

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

	fieldExpression (const word &name, const Time &runTime, const dictionary &dict, const word &fieldName=word::null, const word &resultName=word::null)
	Construct from Time and dictionary. More...

virtual	~fieldExpression ()
	Destructor. More...

virtual bool	execute ()
	Calculate the result field. More...

virtual bool	write ()
	Write the result field. More...

virtual bool	clear ()
	Clear the result field from the objectRegistry. More...

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

	fvMeshFunctionObject (const word &name, const Time &runTime, const dictionary &dict)
	Construct from Time and dictionary. More...

	fvMeshFunctionObject (const word &name, const objectRegistry &obr, const dictionary &dict)
	Construct from the region objectRegistry and dictionary. More...

virtual	~fvMeshFunctionObject ()
	Destructor. More...

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

	regionFunctionObject (const word &name, const Time &runTime, const dictionary &dict)
	Construct from Time and dictionary. More...

	regionFunctionObject (const word &name, const objectRegistry &obr, const dictionary &dict)
	Construct from the region objectRegistry and dictionary. More...

virtual	~regionFunctionObject ()
	Destructor. More...

Public Member Functions inherited from functionObject
virtual const word &	type () const =0
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, functionObject, dictionary,(const word &name, const Time &runTime, const dictionary &dict),(name, runTime, dict))

	functionObject (const word &name)
	Construct from components. More...

autoPtr< functionObject >	clone () const
	Return clone. More...

virtual	~functionObject ()
	Destructor. More...

const word &	name () const
	Return the name of this functionObject. More...

virtual bool	end ()
	Called when Time::run() determines that the time-loop exits. More...

virtual bool	adjustTimeStep ()
	Called at the end of Time::adjustDeltaT() if adjustTime is true. More...

virtual void	updateMesh (const mapPolyMesh &mpm)
	Update for changes of mesh. More...

virtual void	movePoints (const polyMesh &mesh)
	Update for changes of mesh. More...

Additional Inherited Members
Static Public Member Functions inherited from functionObject
static autoPtr< functionObject >	New (const word &name, const Time &, const dictionary &)
	Select from dictionary, based on its "type" entry. More...

Public Attributes inherited from functionObject
Switch	log
	Switch write log to Info. More...

Static Public Attributes inherited from functionObject
static int	debug

static bool	postProcess
	Global post-processing mode switch. More...

Protected Member Functions inherited from fieldExpression
void	setResultName (const word &typeName, const word &defaultArg)

template<class Type >
bool	foundObject (const word &name)

Protected Member Functions inherited from regionFunctionObject
template<class ObjectType >
bool	foundObject (const word &fieldName) const
	Find field in the objectRegistry. More...

template<class ObjectType >
const ObjectType &	lookupObject (const word &fieldName) const
	Lookup object from the objectRegistry. More...

template<class ObjectType >
ObjectType &	lookupObjectRef (const word &fieldName)
	Lookup non-const object reference from the objectRegistry. More...

template<class ObjectType >
bool	store (word &fieldName, const tmp< ObjectType > &tfield, bool cacheable=false)
	Store the given field in the objectRegistry under the given name. More...

bool	writeObject (const word &fieldName)
	Write field if present in objectRegistry. More...

bool	clearObject (const word &fieldName)
	Clear field from the objectRegistry if present. More...

Protected Attributes inherited from fieldExpression
word	fieldName_
	Name of field to process. More...

word	resultName_
	Name of result field. More...

Protected Attributes inherited from fvMeshFunctionObject
const fvMesh &	mesh_
	Reference to the fvMesh. More...

Protected Attributes inherited from regionFunctionObject
const Time &	time_
	Reference to the Time. More...

const objectRegistry &	obr_
	Reference to the region objectRegistry. More...

Detailed Description

Includes tools to manipulate the pressure into different forms.

These currently include:

static pressure
$p = \rho p_k$
total pressure
$p_0 = p_{ref} + p + 0.5 \rho |U|^2$
static pressure coefficient
$Cp = \frac{p - p_{\inf}}{0.5 \rho_{\inf} |U_{\inf}|^2}$
total pressure coefficient
$Cp_0 = \frac{p_0 - p_{\inf}}{0.5 \rho_{\inf} |U_{\inf}|^2}$

where

$\rho$	=	Density [kg/m3]
	=	Velocity [m/s]
$\rho_{\inf}$	=	Freestream density [kg/m3]
$p_{\inf}$	=	Freestream pressure [Pa]
$U_{\inf}$	=	Freestream velocity [m/s]
	=	Kinematic pressure (p/rho)[m2/s2]
	=	Pressure [Pa]
	=	Total pressure [Pa]
$p_{ref}$	=	Reference pressure level [Pa]
	=	Pressure coefficient
	=	Total pressure coefficient

The function object will operate on both kinematic ( $ p_k $ ) and static pressure ( $ p $ ) fields, and the result is written as a volScalarField.

The modes of operation are:

Mode	calcTotal	calcCoeff
`Static` pressure	no	no
`Total` pressure	yes	no
`Pressure` coefficient	no	yes
`Total` pressure coefficient	yes	yes

Example of function object specification to calculate pressure coefficient:

    pressure1
    {
        type        pressure;
        libs        ("libfieldFunctionObjects.so");
        ...
        calcTotal   no;
        calcCoeff   yes;
    }

Usage

Property	Description	Required	Default value
`type`	type name: pressure	yes
`field`	Name of the pressure field	no	p
`U`	Name of the velocity field	no	U
`rho`	Name of the density field	no	rho
`result`	Name of the resulting field	no	derived from p
`calcTotal`	Calculate total coefficient	yes
`pRef`	Reference pressure for total pressure	no	0
`calcCoeff`	Calculate pressure coefficient	yes
`pInf`	Freestream pressure for coefficient calculation	no
`UInf`	Freestream velocity for coefficient calculation	no
`rhoInf`	Freestream density for coefficient calculation	no

See also: Foam::functionObjects::fieldExpression Foam::functionObjects::fvMeshFunctionObject

Source files

Definition at line 257 of file pressure.H.

Constructor & Destructor Documentation

◆ pressure()

pressure	(	const word &	name,
		const Time &	runTime,
		const dictionary &	dict
	)

Construct from Time and dictionary.

Definition at line 186 of file pressure.C.

References Foam::dimPressure, and Foam::read().

Here is the call graph for this function:

◆ ~pressure()

~pressure ( )

virtual

Destructor.

Definition at line 215 of file pressure.C.

Member Function Documentation

◆ TypeName()

TypeName ( "pressure" )

Runtime type information.

◆ read()

bool read ( const dictionary & dict )

virtual

Read the pressure data.

Reimplemented from fieldExpression.

Definition at line 221 of file pressure.C.

References Foam::endl(), dictionary::lookup(), dictionary::lookupOrDefault(), Foam::mag(), Foam::magSqr(), Foam::name(), dictionary::readIfPresent(), Foam::type(), and WarningInFunction.