Calculates and writes a field in the range -1 to 1, in which: More...

Inheritance diagram for flowType:

Collaboration diagram for flowType:

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

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

virtual	~flowType ()
	Destructor. More...

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

virtual wordList	fields () const
	Return the list of fields required. More...

virtual bool	execute ()
	Calculate the flowType fields. More...

virtual bool	write ()
	Write the flowType fields. 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)
	Construct from the region objectRegistry. More...

	fvMeshFunctionObject (const fvMeshFunctionObject &)=delete
	Disallow default bitwise copy construction. More...

virtual	~fvMeshFunctionObject ()
	Destructor. More...

const fvMesh &	mesh () const
	Return a reference to the mesh. More...

void	operator= (const fvMeshFunctionObject &)=delete
	Disallow default bitwise assignment. 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)
	Construct from the region objectRegistry. More...

	regionFunctionObject (const regionFunctionObject &)=delete
	Disallow default bitwise copy construction. More...

virtual	~regionFunctionObject ()
	Destructor. More...

void	operator= (const regionFunctionObject &)=delete
	Disallow default bitwise assignment. More...

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

	objectRegistryFunctionObject (const word &name, const objectRegistry &obr, const dictionary &dict)
	Construct from an objectRegistry and dictionary. More...

	objectRegistryFunctionObject (const word &name, const objectRegistry &obr)
	Construct from an objectRegistry. More...

	objectRegistryFunctionObject (const objectRegistryFunctionObject &)=delete
	Disallow default bitwise copy construction. More...

virtual	~objectRegistryFunctionObject ()
	Destructor. More...

void	operator= (const objectRegistryFunctionObject &)=delete
	Disallow default bitwise assignment. More...

Public Member Functions inherited from functionObject
	ClassName ("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, const Time &runTime)
	Construct from components. More...

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

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

	functionObject (const functionObject &)=delete
	Disallow default bitwise copy construction. More...

virtual	~functionObject ()
	Destructor. More...

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

virtual bool	executeAtStart () const
	Return true if the functionObject should be executed at the start. More...

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

virtual scalar	timeToNextAction ()
	Called by Time::adjustTimeStep(). Allows the functionObject to. More...

virtual scalar	maxDeltaT () const
	Return the maximum time-step for stable operation. More...

virtual void	movePoints (const polyMesh &mesh)
	Update topology using the given map. More...

virtual void	topoChange (const polyTopoChangeMap &map)
	Update topology using the given map. More...

virtual void	mapMesh (const polyMeshMap &)
	Update from another mesh using the given map. More...

virtual void	distribute (const polyDistributionMap &)
	Redistribute or update using the given distribution map. More...

void	operator= (const functionObject &)=delete
	Disallow default bitwise assignment. More...

Public Member Functions inherited from writeLocalObjects
	writeLocalObjects (const objectRegistry &obr, const Switch &logRef=logFalse)
	Construct from objectRegistry and inheriting function object. More...

	writeLocalObjects (const writeLocalObjects &)=delete
	Disallow default bitwise copy construction. More...

virtual	~writeLocalObjects ()
	Destructor. More...

const wordList &	localObjectNames () const
	Return const access to the local object names. More...

void	operator= (const writeLocalObjects &)=delete
	Disallow default bitwise assignment. More...

Public Member Functions inherited from writeObjectsBase
	writeObjectsBase (const objectRegistry &obr, const Switch &logRef=logFalse)
	Construct from objectRegistry and inheriting function object. More...

	writeObjectsBase (const writeObjectsBase &)=delete
	Disallow default bitwise copy construction. More...

virtual	~writeObjectsBase ()
	Destructor. More...

const wordReList &	writeObjectNames () const
	Return const access to the object names requested to be written. More...

void	operator= (const writeObjectsBase &)=delete
	Disallow default bitwise assignment. 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...

Switch	executeAtStart_
	Switch execute at start time. More...

Static Public Attributes inherited from functionObject
static bool	postProcess
	Global post-processing mode switch. More...

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

template<class ObjectType >
void	cannotFindObject (const word &fieldName)
	Prints a warning message that fieldName cannot be found. More...

void	cannotFindObject (const word &fieldName)
	Prints a warning message that fieldName cannot be found. More...

void	cannotFindObjects (const wordList &fieldNames)
	Prints a warning message that fieldNames cannot be found. 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 >
ObjectType &	store (const tmp< ObjectType > &tfield)
	Store the given field in the objectRegistry. More...

template<class ObjectType >
ObjectType &	store (const 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 Member Functions inherited from writeLocalObjects
void	resetLocalObjectName (const word &name)
	Reset the list of local object names from a single word. More...

void	resetLocalObjectNames (const wordList &names)
	Reset the list of local object names from a wordList. More...

virtual wordList	objectNames ()
	Get the list of field names to be written. More...

Protected Member Functions inherited from writeObjectsBase
void	resetWriteObjectName (const wordRe &name)
	Reset the list of object names to be written to a single regular. More...

void	resetWriteObjectNames (const wordReList &names)
	Reset the list of object names to be written. More...

virtual void	writeObject (const regIOobject &obj)
	Write the requested registered IO object. More...

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

Protected Attributes inherited from objectRegistryFunctionObject
const objectRegistry &	obr_
	Reference to the objectRegistry. More...

Protected Attributes inherited from functionObject
const Time &	time_
	Reference to time. More...

Protected Attributes inherited from writeLocalObjects
wordList	localObjectNames_
	Object names that are handled on behalf of the inheritor. More...

Protected Attributes inherited from writeObjectsBase
const objectRegistry &	writeObr_
	Reference to the region objectRegistry. More...

const Switch &	log_
	Reference to the inheriting function object's log variable. More...

Switch	regExp_
	Optional switch for regular expression support. More...

wordReList	writeObjectNames_
	Object names requested by the user to be written. More...

Static Protected Attributes inherited from writeObjectsBase
static const Switch	logFalse
	False switch to which log_ defaults. More...

Detailed Description

Calculates and writes a field in the range -1 to 1, in which:

- 1 = rotational flow

0 = parallel shear (50% rotational, 50% shear)
-1 = pure shear deformation

The field is calculated as:

flowType = -(devGradU && devGradU.T())/magSqr(devGradU)

where devGradU = dev(fvc::grad(U)). The flowType parameter is designed for visualisation of vortices, by extracting an iso-surface of these fields at a specified value. The parameter is similar to Q and Lambda2, except that Q and Lambda2 represent the rotational speed, or "strength", of vortices whereas flowType is normalised to a scale between -1 and 1, making it independent of vortex strength.

The normalisation of flowType provides the advantage that it is much easier to select a value of iso-surface to visualise vortices effectively. Generally a value of 0.2 (or between 0.05 - 0.2) is recommended. With Q and Lambda2 the choice of an effective iso-surface value depends on the strength of vortices for the specific CFD problem.

The flowType function object writes an additional magSqrDevGradU field corresponding to the denominator in the flowType field. An iso-surface can then be coloured by the magSqrDevGradU field to indicate the strength of the vortices as they move with the flow.