fieldAverage Class Reference

Computes ensemble- and/or time-based field averages, with optional windowing, for a user-specified selection of volumetric and/or surface fields. More...

Inheritance diagram for fieldAverage:
Collaboration diagram for fieldAverage:

Public Member Functions

 TypeName ("fieldAverage")
 Runtime type information. More...
 
 fieldAverage (const word &name, const Time &runTime, const dictionary &)
 Construct from name, Time and dictionary. More...
 
 fieldAverage (const fieldAverage &)=delete
 No copy construct. More...
 
void operator= (const fieldAverage &)=delete
 No copy assignment. More...
 
virtual ~fieldAverage ()=default
 Destructor. More...
 
virtual bool read (const dictionary &dict)
 Read the function-object dictionary. More...
 
virtual bool execute ()
 Execute the function-object operations. More...
 
virtual bool write ()
 Write the function-object results. 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 ()=default
 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 ()=default
 Destructor. More...
 
template<class ObjectType >
const ObjectType * lookupObjectPtr (const word &fieldName) const
 Deprecated(2018-10) More...
 
template<class ObjectType >
ObjectType * lookupObjectRefPtr (const word &fieldName) const
 Deprecated(2018-10) More...
 
- Public Member Functions inherited from stateFunctionObject
 stateFunctionObject (const word &name, const Time &runTime)
 Construct from components. More...
 
virtual ~stateFunctionObject ()=default
 Destructor. More...
 
dictionarypropertyDict ()
 Return access to the property dictionary. More...
 
bool foundProperty (const word &entryName) const
 Return true if the property exists. More...
 
void clearTrigger ()
 Remove the trigger index from the properties. More...
 
label getTrigger () const
 Get the current trigger index. More...
 
bool setTrigger (const label triggeri)
 Set new trigger index. More...
 
bool getDict (const word &entryName, dictionary &dict) const
 Set dictionary, return true if set. More...
 
bool getObjectDict (const word &objectName, const word &entryName, dictionary &dict) const
 Set dictionary from named object, return true if set. More...
 
template<class Type >
Type getProperty (const word &entryName, const Type &defaultValue=Type(Zero)) const
 Retrieve generic property. More...
 
template<class Type >
bool getProperty (const word &entryName, Type &value) const
 Set generic property, return true if set. More...
 
template<class Type >
void setProperty (const word &entryName, const Type &value)
 Add generic property. More...
 
template<class Type >
Type getObjectProperty (const word &objectName, const word &entryName, const Type &defaultValue=Type(Zero)) const
 Retrieve generic property from named object. More...
 
template<class Type >
bool getObjectProperty (const word &objectName, const word &entryName, Type &value) const
 Set generic property from named object, return true if set. More...
 
template<class Type >
void setObjectProperty (const word &objectName, const word &entryName, const Type &value)
 Add generic property from named object. More...
 
bool getObjectResultDict (const word &objectName, dictionary &dict) const
 
template<class Type >
void setResult (const word &entryName, const Type &value)
 Add result. More...
 
template<class Type >
void setObjectResult (const word &objectName, const word &entryName, const Type &value)
 Add result from named object. More...
 
template<class Type >
Type getResult (const word &entryName, const Type &defaultValue=Type(Zero)) const
 Retrieve result. More...
 
template<class Type >
Type getObjectResult (const word &objectName, const word &entryName, const Type &defaultValue=Type(Zero)) const
 Retrieve result from named object. More...
 
template<class Type >
bool getObjectResult (const word &objectName, const word &entryName, Type &value) const
 Set result from named object, return true if set. More...
 
word resultType (const word &entryName) const
 Retrieve the result type. More...
 
word objectResultType (const word &objectName, const word &entryName) const
 Return the type of result. More...
 
wordList objectResultEntries () const
 Retrieve the result entries. More...
 
wordList objectResultEntries (const word &objectName) const
 Return result entries for named object. More...
 
void writeResultEntries (Ostream &os) const
 Write the results entries for all objects to stream. More...
 
void writeResultEntries (const word &objectName, Ostream &os) const
 Write the results entries for named object to stream. More...
 
void writeAllResultEntries (Ostream &os) const
 Write the results entries for all objects to stream. More...
 
- Public Member Functions inherited from timeFunctionObject
 timeFunctionObject (const word &name, const Time &runTime)
 Construct from Time. More...
 
virtual ~timeFunctionObject ()=default
 Destructor. More...
 
const Timetime () const
 Return time database. More...
 
objectRegistrystoredObjects ()
 Write access to the output objects ("functionObjectObjects") registered on Time. More...
 
const objectRegistrystoredObjects () const
 Const access to the output objects ("functionObjectObjects") registered on Time. More...
 
- Public Member Functions inherited from functionObject
 declareRunTimeSelectionTable (autoPtr, functionObject, dictionary,(const word &name, const Time &runTime, const dictionary &dict),(name, runTime, dict))
 
 functionObject (const word &name, const bool withNamePrefix=defaultUseNamePrefix)
 Construct from components. More...
 
autoPtr< functionObjectclone () const
 Return clone. More...
 
virtual ~functionObject ()=default
 Destructor. More...
 
virtual const wordtype () const =0
 Runtime type information. More...
 
const wordname () const noexcept
 Return the name of this functionObject. More...
 
bool useNamePrefix () const noexcept
 Return the flag for adding a scoping name prefix. More...
 
bool useNamePrefix (bool on) noexcept
 Modify the flag for adding a scoping name prefix. More...
 
virtual bool execute (const label subIndex)
 Execute using the specified subIndex. 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 bool filesModified () const
 Did any file get changed during execution? 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...
 

Protected Member Functions

void initialize ()
 Reset lists (clear existing values) and initialize averaging. More...
 
void restart ()
 Restart averaging for restartOnOutput. More...
 
template<class Type >
bool addMeanFieldType (fieldAverageItem &item)
 Add mean average field to database. More...
 
template<class Type >
bool addMeanField (fieldAverageItem &item)
 Add mean average field to database. More...
 
template<class Type1 , class Type2 >
bool addPrime2MeanFieldType (fieldAverageItem &item)
 Add prime-squared average field to database. More...
 
template<class Type1 , class Type2 >
bool addPrime2MeanField (fieldAverageItem &item)
 Add prime-squared average field to database. More...
 
virtual void calcAverages ()
 Main calculation routine. More...
 
template<class Type >
void calculateMeanFields () const
 Calculate mean average fields. More...
 
template<class Type1 , class Type2 >
void calculatePrime2MeanFields () const
 Calculate prime-squared average fields. More...
 
template<class Type1 , class Type2 >
bool addMeanSqrToPrime2MeanType (const fieldAverageItem &item) const
 Add mean-squared field value to prime-squared mean field. More...
 
template<class Type1 , class Type2 >
void addMeanSqrToPrime2Mean () const
 Add mean-squared field value to prime-squared mean field. More...
 
template<class Type >
bool storeWindowFieldType (fieldAverageItem &item)
 
template<class Type >
void storeWindowFields ()
 
template<class Type >
bool restoreWindowFieldsType (const fieldAverageItem &item)
 
template<class Type >
void restoreWindowFields (const fieldAverageItem &item)
 
virtual void writeAverages () const
 Write averages. More...
 
template<class Type >
bool writeFieldType (const word &fieldName) const
 Write fields. More...
 
template<class Type >
void writeFields () const
 Write fields. More...
 
void writeAveragingProperties ()
 Write averaging properties - steps and time. More...
 
void readAveragingProperties ()
 Read averaging properties - steps and time. More...
 
- Protected Member Functions inherited from fvMeshFunctionObject
 fvMeshFunctionObject (const fvMeshFunctionObject &)=delete
 No copy construct. More...
 
void operator= (const fvMeshFunctionObject &)=delete
 No copy assignment. More...
 
- Protected Member Functions inherited from regionFunctionObject
virtual const objectRegistryobr () const
 The region or sub-region registry being used. More...
 
template<class ObjectType >
bool foundObject (const word &fieldName) const
 Find object (eg, a field) in the (sub) objectRegistry. More...
 
template<class ObjectType >
const ObjectType * cfindObject (const word &fieldName) const
 Return const pointer to the object (eg, a field) in the (sub) objectRegistry. More...
 
template<class ObjectType >
const ObjectType * findObject (const word &fieldName) const
 Return const pointer to the object (eg, a field) in the (sub) objectRegistry. More...
 
template<class ObjectType >
ObjectType * findObject (const word &fieldName)
 Return non-const pointer to the object of the given Type, (sub) objectRegistry. More...
 
template<class ObjectType >
ObjectType * getObjectPtr (const word &fieldName) const
 Return non-const pointer to the object of the given Type, using a const-cast to have it behave like a mutable. More...
 
template<class ObjectType >
const ObjectType & lookupObject (const word &fieldName) const
 Lookup and return object (eg, a field) from the (sub) objectRegistry. More...
 
template<class ObjectType >
ObjectType & lookupObjectRef (const word &fieldName) const
 Lookup and return object (eg, a field) from the (sub) objectRegistry. More...
 
template<class ObjectType >
bool store (word &fieldName, const tmp< ObjectType > &tfield, bool cacheable=false)
 Store the field in the (sub) objectRegistry under the given name. More...
 
template<class ObjectType >
bool storeInDb (const word &fieldName, const tmp< ObjectType > &tfield, const objectRegistry &obr)
 Store the field in an optional objectRegistry under the given name. More...
 
bool writeObject (const word &fieldName)
 Write field if present in the (sub) objectRegistry. More...
 
bool clearObject (const word &fieldName)
 Clear field from the (sub) objectRegistry if present. More...
 
void clearObjects (const wordList &objNames)
 Clear fields from the (sub) objectRegistry if present. More...
 
 regionFunctionObject (const regionFunctionObject &)=delete
 No copy construct. More...
 
void operator= (const regionFunctionObject &)=delete
 No copy assignment. More...
 
- Protected Member Functions inherited from stateFunctionObject
const functionObjects::propertiesstateDict () const
 Return a const reference to the state dictionary. More...
 
functionObjects::propertiesstateDict ()
 Return non-const access to the state dictionary. More...
 
 stateFunctionObject (const stateFunctionObject &)=delete
 No copy construct. More...
 
void operator= (const stateFunctionObject &)=delete
 No copy assignment. More...
 
- Protected Member Functions inherited from timeFunctionObject
void clearOutputObjects (const wordList &objNames)
 Remove specified items from "functionObjectObjects". More...
 
 timeFunctionObject (const timeFunctionObject &)=delete
 No copy construct. More...
 
void operator= (const timeFunctionObject &)=delete
 No copy assignment. More...
 
- Protected Member Functions inherited from functionObject
word scopedName (const word &name) const
 Return a scoped (prefixed) name. More...
 

Protected Attributes

label prevTimeIndex_
 Time at last call, prevents repeated averaging. More...
 
bool initialised_
 Initialised flag. More...
 
Switch restartOnRestart_
 Restart the averaging process on restart. More...
 
Switch restartOnOutput_
 Restart the averaging process on output. More...
 
Switch periodicRestart_
 Periodically restart the averaging process. More...
 
scalar restartPeriod_
 Restart period. More...
 
scalar restartTime_
 Specific restart time. More...
 
List< fieldAverageItemfaItems_
 List of field average items, describing what averages to be calculated and output. More...
 
List< label > totalIter_
 Iteration steps counter. More...
 
List< scalar > totalTime_
 Total time counter. More...
 
label periodIndex_
 Index for periodic restart. More...
 
- Protected Attributes inherited from fvMeshFunctionObject
const fvMeshmesh_
 Reference to the fvMesh. More...
 
- Protected Attributes inherited from regionFunctionObject
word subRegistryName_
 Name for alternative object registry. More...
 
const objectRegistryobr_
 Reference to the region objectRegistry. More...
 
const objectRegistryobrPtr_
 Pointer to alternative (eg, sub-region) objectRegistry. More...
 
- Protected Attributes inherited from timeFunctionObject
const Timetime_
 Reference to the time database. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from functionObject
static autoPtr< functionObjectNew (const word &name, const Time &runTime, const dictionary &dict)
 Select from dictionary, based on its "type" entry. More...
 
- Public Attributes inherited from functionObject
bool log
 Flag to write log into Info. More...
 
- Static Public Attributes inherited from functionObject
static int debug
 Flag to execute debug content. More...
 
static bool postProcess
 Global post-processing mode switch. More...
 
static bool defaultUseNamePrefix
 Global default for useNamePrefix. More...
 
static word outputPrefix
 Directory prefix. More...
 

Detailed Description

Computes ensemble- and/or time-based field averages, with optional windowing, for a user-specified selection of volumetric and/or surface fields.

Fields are entered as a list of sub-dictionaries, which indicate the type of averages to perform, and can be updated during the calculation. The current options include:

  • mean: arithmetic mean

    \[ \overline{x} = \frac{1}{N}\displaystyle\sum\limits_{i=0}^N x_i \]

  • prime2Mean: prime-squared mean

    \[ \overline{x'}^2 = \frac{1}{N}\displaystyle\sum\limits_{i=0}^N (x_i - \overline{x})^2 \]

  • base: average over 'time', or 'iteration' (N in the above)
  • window: optional averaging window, specified in 'base' units

Average field names are constructed by concatenating the base field with the averaging type, e.g. when averaging field 'U', the name of resultant fields becomes:

  • arithmetic mean field, UMean
  • prime-squared field, UPrime2Mean

Information regarding the number of averaging steps, and total averaging time are written on a per-field basis to the "<functionObject name>Properties" dictionary, located in <time>/uniform.

When restarting form a previous calculation, the averaging is continuous or may be restarted using the restartOnRestart option.

The averaging process may be restarted after each calculation output time using the restartOnOutput option or restarted periodically using the periodicRestart option and setting restartPeriod to the required averaging period.

With the subRegion option, also supports fields on function object surface output (e.g., sampledSurfaces).

Operands:

Operand Type Location
input {vol,surface}<Type>Field(s) <time>/inputFields
output file - -
output field {vol,surface}<Type>Field(s) <time>/outputFields

where Type can be one of: Scalar, Vector, SphericalTensor, SymmTensor, or Tensor.

Usage
Minimal example by using system/controlDict.functions:
fieldAverageFO
{
    // Mandatory entries
    type                fieldAverage;
    libs                (fieldFunctionObjects);
    fields
    (
        <field1>
        {
            // Inherited entries
            ...
        }

        ...

        <fieldN>
        {
            ...
        }
    );

    // Optional entries
    restartOnRestart    false;
    restartOnOutput     false;
    periodicRestart     false;
    restartPeriod       0.002;

    // Inherited entries
    ...
}

where the entries mean:

Property Description Type Reqd Deflt
type Type name: fieldAverage word yes -
libs Library name: fieldFunctionObjects word yes -
fields Names of the operand fields and averaging options dict yes -
restartOnRestart Restart the averaging on restart bool no false
restartOnOutput Restart the averaging on output bool no false
periodicRestart Periodically restart the averaging bool no false
restartPeriod Periodic restart period scalar conditional -
restartTime One-shot reset of the averaging scalar no GREAT
subRegion Name for alternative objectRegistry word no ""

The inherited entries are elaborated in:

Source files

Definition at line 239 of file fieldAverage.H.

Constructor & Destructor Documentation

◆ fieldAverage() [1/2]

fieldAverage ( const word name,
const Time runTime,
const dictionary dict 
)

Construct from name, Time and dictionary.

Definition at line 264 of file fieldAverage.C.

References dict, and Foam::read().

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◆ fieldAverage() [2/2]

fieldAverage ( const fieldAverage )
delete

No copy construct.

◆ ~fieldAverage()

virtual ~fieldAverage ( )
virtualdefault

Destructor.

Member Function Documentation

◆ initialize()

void initialize ( )
protected

Reset lists (clear existing values) and initialize averaging.

Check requested field averages are valid, populate field lists

Definition at line 41 of file fieldAverage.C.

References Foam::endl(), fieldAverage::faItems_, fieldAverage::initialised_, Log, functionObject::name(), Foam::nl, regionFunctionObject::obr(), fieldAverage::prevTimeIndex_, functionObject::type(), and WarningInFunction.

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◆ restart()

void restart ( )
protected

Restart averaging for restartOnOutput.

Definition at line 97 of file fieldAverage.C.

References Foam::endl(), Log, and Foam::nl.

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◆ addMeanFieldType()

bool addMeanFieldType ( fieldAverageItem item)
protected

Add mean average field to database.

Definition at line 32 of file fieldAverageTemplates.C.

References fieldAverageItem::active(), Foam::endl(), fieldAverageItem::fieldName(), found, Log, fieldAverageItem::mean(), fieldAverageItem::meanFieldName(), startTime, and timeName.

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◆ addMeanField()

bool addMeanField ( fieldAverageItem item)
protected

Add mean average field to database.

Definition at line 94 of file fieldAverageTemplates.C.

References fieldAverageItem::mean().

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◆ addPrime2MeanFieldType()

bool addPrime2MeanFieldType ( fieldAverageItem item)
protected

Add prime-squared average field to database.

Definition at line 200 of file fieldAverageTemplates.C.

References Foam::endl(), fieldAverageItem::fieldName(), found, Log, fieldAverageItem::meanFieldName(), Foam::nl, fieldAverageItem::prime2Mean(), fieldAverageItem::prime2MeanFieldName(), Foam::sqr(), startTime, and timeName.

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◆ addPrime2MeanField()

bool addPrime2MeanField ( fieldAverageItem item)
protected

Add prime-squared average field to database.

Definition at line 259 of file fieldAverageTemplates.C.

References Foam::exit(), Foam::FatalError, FatalErrorInFunction, fieldAverageItem::fieldName(), fieldAverageItem::mean(), Foam::nl, and fieldAverageItem::prime2Mean().

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◆ calcAverages()

void calcAverages ( )
protectedvirtual

Main calculation routine.

Definition at line 112 of file fieldAverage.C.

References Foam::endl(), forAll, initialised_(), Log, Foam::name(), Foam::nl, and Foam::type().

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◆ calculateMeanFields()

void calculateMeanFields ( ) const
protected

Calculate mean average fields.

Definition at line 368 of file fieldAverageTemplates.C.

References fieldAverageItem::calculateMeanField().

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◆ calculatePrime2MeanFields()

void calculatePrime2MeanFields ( ) const
protected

Calculate prime-squared average fields.

Definition at line 391 of file fieldAverageTemplates.C.

References fieldAverageItem::calculatePrime2MeanField().

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◆ addMeanSqrToPrime2MeanType()

bool addMeanSqrToPrime2MeanType ( const fieldAverageItem item) const
protected

Add mean-squared field value to prime-squared mean field.

Definition at line 422 of file fieldAverageTemplates.C.

References fieldAverageItem::fieldName(), fieldAverageItem::meanFieldName(), fieldAverageItem::prime2MeanFieldName(), and Foam::sqr().

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◆ addMeanSqrToPrime2Mean()

void addMeanSqrToPrime2Mean ( ) const
protected

Add mean-squared field value to prime-squared mean field.

Definition at line 442 of file fieldAverageTemplates.C.

References fieldAverageItem::prime2Mean().

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◆ storeWindowFieldType()

bool storeWindowFieldType ( fieldAverageItem item)
protected

◆ storeWindowFields()

void storeWindowFields ( )
protected

Definition at line 344 of file fieldAverageTemplates.C.

References fieldAverage::faItems_, and fieldAverageItem::storeWindowFields().

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◆ restoreWindowFieldsType()

bool restoreWindowFieldsType ( const fieldAverageItem item)
protected

◆ restoreWindowFields()

void restoreWindowFields ( const fieldAverageItem item)
protected

Definition at line 176 of file fieldAverageTemplates.C.

References fieldAverageItem::window().

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◆ writeAverages()

void writeAverages ( ) const
protectedvirtual

Write averages.

Definition at line 185 of file fieldAverage.C.

References Foam::endl(), and Log.

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◆ writeFieldType()

bool writeFieldType ( const word fieldName) const
protected

Write fields.

Definition at line 475 of file fieldAverageTemplates.C.

References DebugInfo, Foam::endl(), and Ostream::write().

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◆ writeFields()

◆ writeAveragingProperties()

void writeAveragingProperties ( )
protected

Write averaging properties - steps and time.

Definition at line 199 of file fieldAverage.C.

References propsDict().

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◆ readAveragingProperties()

void readAveragingProperties ( )
protected

Read averaging properties - steps and time.

Definition at line 210 of file fieldAverage.C.

References Foam::endl(), Foam::Info, and Foam::nl.

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◆ TypeName()

TypeName ( "fieldAverage"  )

Runtime type information.

◆ operator=()

void operator= ( const fieldAverage )
delete

No copy assignment.

◆ read()

bool read ( const dictionary dict)
virtual

Read the function-object dictionary.

Reimplemented from regionFunctionObject.

Definition at line 287 of file fieldAverage.C.

References dict, Foam::endl(), Foam::Info, initialised_(), Foam::name(), names, Foam::nl, regionFunctionObject::read(), UList< T >::size(), Foam::type(), and WarningInFunction.

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◆ execute()

bool execute ( )
virtual

Execute the function-object operations.

Implements functionObject.

Definition at line 384 of file fieldAverage.C.

◆ write()

bool write ( )
virtual

Write the function-object results.

Implements functionObject.

Definition at line 392 of file fieldAverage.C.

Member Data Documentation

◆ prevTimeIndex_

label prevTimeIndex_
protected

Time at last call, prevents repeated averaging.

Definition at line 250 of file fieldAverage.H.

Referenced by fieldAverage::initialize().

◆ initialised_

bool initialised_
protected

Initialised flag.

Definition at line 255 of file fieldAverage.H.

Referenced by fieldAverage::initialize().

◆ restartOnRestart_

Switch restartOnRestart_
protected

Restart the averaging process on restart.

Definition at line 260 of file fieldAverage.H.

◆ restartOnOutput_

Switch restartOnOutput_
protected

Restart the averaging process on output.

Definition at line 265 of file fieldAverage.H.

◆ periodicRestart_

Switch periodicRestart_
protected

Periodically restart the averaging process.

Definition at line 270 of file fieldAverage.H.

◆ restartPeriod_

scalar restartPeriod_
protected

Restart period.

Definition at line 275 of file fieldAverage.H.

◆ restartTime_

scalar restartTime_
protected

Specific restart time.

Definition at line 280 of file fieldAverage.H.

◆ faItems_

List<fieldAverageItem> faItems_
protected

List of field average items, describing what averages to be calculated and output.

Definition at line 286 of file fieldAverage.H.

Referenced by fieldAverage::initialize(), and fieldAverage::storeWindowFields().

◆ totalIter_

List<label> totalIter_
protected

Iteration steps counter.

Definition at line 293 of file fieldAverage.H.

◆ totalTime_

List<scalar> totalTime_
protected

Total time counter.

Definition at line 298 of file fieldAverage.H.

◆ periodIndex_

label periodIndex_
protected

Index for periodic restart.

Definition at line 303 of file fieldAverage.H.


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