Public Member Functions | Static Public Attributes | List of all members
noiseFFT Class Reference

FFT of the pressure field. More...

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Public Member Functions

 noiseFFT (const scalar deltat, const scalarField &pressure)
 Construct from pressure field. More...
 
 noiseFFT (Istream &)
 Construct from Istream. More...
 
 noiseFFT (const fileName &pFileName, const label skip=0)
 Construct from pressure field file name. More...
 
graph pt () const
 Return the graph of p(t) More...
 
tmp< scalarFieldwindow (const label N, const label n) const
 Return the nth window. More...
 
tmp< scalarFieldHanning (const label N) const
 Return the Hanning window function. More...
 
tmp< scalarFieldPf (const tmp< scalarField > &pn) const
 Return the fft of the given pressure data. More...
 
graph meanPf (const label N, const label nw) const
 Return the multi-window mean fft of the complete pressure data. More...
 
graph RMSmeanPf (const label N, const label nw) const
 Return the multi-window RMS mean fft of the complete pressure data. More...
 
graph Lf (const graph &gPf) const
 Return the narrow-band PFL (pressure-fluctuation level) spectrum. More...
 
graph Ldelta (const graph &gLf, const scalar f1, const scalar fU) const
 Return the one-third-octave-band PFL spectrum. More...
 
graph Pdelta (const graph &gLf, const scalar f1, const scalar fU) const
 Return the one-third-octave-band pressure spectrum. More...
 
scalar Lsum (const graph &gLf) const
 Return the total PFL as the sum of Lf over all frequencies. More...
 
scalar dbToPa (const scalar db) const
 Convert the db into Pa. More...
 
tmp< scalarFielddbToPa (const tmp< scalarField > &db) const
 Convert the db-field into Pa. More...
 
- Public Member Functions inherited from Field< Type >
 Field ()
 Construct null. More...
 
 Field (const label)
 Construct given size. More...
 
 Field (const label, const Type &)
 Construct given size and initial value. More...
 
 Field (const UList< Type > &)
 Construct as copy of a UList<Type> More...
 
 Field (const Xfer< List< Type > > &)
 Construct by transferring the List contents. More...
 
 Field (const UList< Type > &mapF, const labelUList &mapAddressing)
 Construct by 1 to 1 mapping from the given field. More...
 
 Field (const tmp< Field< Type > > &tmapF, const labelUList &mapAddressing)
 Construct by 1 to 1 mapping from the given tmp field. More...
 
 Field (const UList< Type > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
 Construct by interpolative mapping from the given field. More...
 
 Field (const tmp< Field< Type > > &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
 Construct by interpolative mapping from the given tmp field. More...
 
 Field (const UList< Type > &mapF, const FieldMapper &map)
 Construct by mapping from the given field. More...
 
 Field (const UList< Type > &mapF, const FieldMapper &map, const Type &defaultValue)
 Construct by mapping from the given field. More...
 
 Field (const UList< Type > &mapF, const FieldMapper &map, const UList< Type > &defaultValues)
 Construct by mapping from the given field. More...
 
 Field (const tmp< Field< Type > > &tmapF, const FieldMapper &map)
 Construct by mapping from the given tmp field. More...
 
 Field (const tmp< Field< Type > > &tmapF, const FieldMapper &map, const Type &defaultValue)
 Construct by mapping from the given tmp field. Supplied uniform. More...
 
 Field (const tmp< Field< Type > > &tmapF, const FieldMapper &map, const UList< Type > &defaultValues)
 Construct by mapping from the given tmp field. Supplied values. More...
 
 Field (const Field< Type > &)
 Construct as copy. More...
 
 Field (Field< Type > &, bool reUse)
 Construct as copy or re-use as specified. More...
 
 Field (const Xfer< Field< Type > > &)
 Construct by transferring the Field contents. More...
 
 Field (const tmp< Field< Type > > &)
 Construct as copy of tmp<Field> More...
 
 Field (Istream &)
 Construct from Istream. More...
 
 Field (const word &keyword, const dictionary &, const label size)
 Construct from a dictionary entry. More...
 
tmp< Field< Type > > clone () const
 Clone. More...
 
void map (const UList< Type > &mapF, const labelUList &mapAddressing)
 1 to 1 map from the given field More...
 
void map (const tmp< Field< Type > > &tmapF, const labelUList &mapAddressing)
 1 to 1 map from the given tmp field More...
 
void map (const UList< Type > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
 Interpolative map from the given field. More...
 
void map (const tmp< Field< Type > > &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
 Interpolative map from the given tmp field. More...
 
void map (const UList< Type > &mapF, const FieldMapper &map)
 Map from the given field. More...
 
void map (const tmp< Field< Type > > &tmapF, const FieldMapper &map)
 Map from the given tmp field. More...
 
void autoMap (const FieldMapper &map)
 Map from self. More...
 
void rmap (const UList< Type > &mapF, const labelUList &mapAddressing)
 1 to 1 reverse-map from the given field More...
 
void rmap (const tmp< Field< Type > > &tmapF, const labelUList &mapAddressing)
 1 to 1 reverse-map from the given tmp field More...
 
void rmap (const UList< Type > &mapF, const labelUList &mapAddressing, const UList< scalar > &weights)
 Interpolative reverse map from the given field. More...
 
void rmap (const tmp< Field< Type > > &tmapF, const labelUList &mapAddressing, const UList< scalar > &weights)
 Interpolative reverse map from the given tmp field. More...
 
void negate ()
 Negate this field. More...
 
tmp< Field< cmptType > > component (const direction) const
 Return a component field of the field. More...
 
void replace (const direction, const UList< cmptType > &)
 Replace a component field of the field. More...
 
void replace (const direction, const tmp< Field< cmptType > > &)
 Replace a component field of the field. More...
 
void replace (const direction, const cmptType &)
 Replace a component field of the field. More...
 
tmp< Field< Type > > T () const
 Return the field transpose (only defined for second rank tensors) More...
 
void writeEntry (const word &keyword, Ostream &os) const
 Write the field as a dictionary entry. More...
 
void operator= (const Field< Type > &)
 
void operator= (const UList< Type > &)
 
void operator= (const SubField< Type > &)
 
void operator= (const tmp< Field< Type > > &)
 
void operator= (const Type &)
 
template<class Form , class Cmpt , int nCmpt>
void operator= (const VectorSpace< Form, Cmpt, nCmpt > &)
 
void operator+= (const UList< Type > &)
 
void operator+= (const tmp< Field< Type > > &)
 
void operator-= (const UList< Type > &)
 
void operator-= (const tmp< Field< Type > > &)
 
void operator*= (const UList< scalar > &)
 
void operator*= (const tmp< Field< scalar > > &)
 
void operator/= (const UList< scalar > &)
 
void operator/= (const tmp< Field< scalar > > &)
 
void operator+= (const Type &)
 
void operator-= (const Type &)
 
void operator*= (const scalar &)
 
void operator/= (const scalar &)
 
template<class Type>
void operator= (const tmp< Field > &rhs)
 
- Public Member Functions inherited from refCount
 refCount ()
 Construct null with zero count. More...
 
int count () const
 Return the reference count. More...
 
bool okToDelete () const
 Return true if the reference count is zero. More...
 
void resetRefCount ()
 Reset the reference count to zero. More...
 
void operator++ ()
 Increment the reference count. More...
 
void operator++ (int)
 Increment the reference count. More...
 
void operator-- ()
 Decrement the reference count. More...
 
void operator-- (int)
 Decrement the reference count. More...
 
- Public Member Functions inherited from List< Type >
label size () const
 Return the number of elements in the UList. More...
 
 List ()
 Null constructor. More...
 
 List (const label)
 Construct with given size. More...
 
 List (const label, const Type &)
 Construct with given size and value for all elements. More...
 
 List (const List< Type > &)
 Copy constructor. More...
 
 List (const Xfer< List< Type > > &)
 Construct by transferring the parameter contents. More...
 
 List (List< Type > &, bool reUse)
 Construct as copy or re-use as specified. More...
 
 List (const UList< Type > &, const labelUList &mapAddressing)
 Construct as subset. More...
 
 List (InputIterator first, InputIterator last)
 Construct given start and end iterators. More...
 
 List (const FixedList< Type, Size > &)
 Construct as copy of FixedList<T, Size> More...
 
 List (const PtrList< Type > &)
 Construct as copy of PtrList<T> More...
 
 List (const SLList< Type > &)
 Construct as copy of SLList<T> More...
 
 List (const UIndirectList< Type > &)
 Construct as copy of UIndirectList<T> More...
 
 List (const BiIndirectList< Type > &)
 Construct as copy of BiIndirectList<T> More...
 
 List (Istream &)
 Construct from Istream. More...
 
autoPtr< List< Type > > clone () const
 Clone. More...
 
 ~List ()
 Destructor. More...
 
void resize (const label)
 Alias for setSize(const label) More...
 
void resize (const label, const Type &)
 Alias for setSize(const label, const T&) More...
 
void setSize (const label)
 Reset size of List. More...
 
void setSize (const label, const Type &)
 Reset size of List and value for new elements. More...
 
void clear ()
 Clear the list, i.e. set size to zero. More...
 
void append (const Type &)
 Append an element at the end of the list. More...
 
void append (const UList< Type > &)
 Append a List at the end of this list. More...
 
void append (const UIndirectList< Type > &)
 Append a UIndirectList at the end of this list. More...
 
void transfer (List< Type > &)
 Transfer the contents of the argument List into this list. More...
 
void transfer (DynamicList< Type, SizeInc, SizeMult, SizeDiv > &)
 Transfer the contents of the argument List into this list. More...
 
void transfer (SortableList< Type > &)
 Transfer the contents of the argument List into this list. More...
 
Xfer< List< Type > > xfer ()
 Transfer contents to the Xfer container. More...
 
Type & newElmt (const label)
 Return subscript-checked element of UList. More...
 
void operator= (const UList< Type > &)
 Assignment from UList operator. Takes linear time. More...
 
void operator= (const List< Type > &)
 Assignment operator. Takes linear time. More...
 
void operator= (const SLList< Type > &)
 Assignment from SLList operator. Takes linear time. More...
 
void operator= (const UIndirectList< Type > &)
 Assignment from UIndirectList operator. Takes linear time. More...
 
void operator= (const BiIndirectList< Type > &)
 Assignment from BiIndirectList operator. Takes linear time. More...
 
void operator= (const Type &)
 Assignment of all entries to the given value. More...
 
- Public Member Functions inherited from UList< Type >
 UList ()
 Null constructor. More...
 
 UList (Type *__restrict__ v, label size)
 Construct from components. More...
 
label fcIndex (const label i) const
 Return the forward circular index, i.e. the next index. More...
 
label rcIndex (const label i) const
 Return the reverse circular index, i.e. the previous index. More...
 
std::streamsize byteSize () const
 Return the binary size in number of characters of the UList. More...
 
const Type * cdata () const
 Return a const pointer to the first data element,. More...
 
Type * data ()
 Return a pointer to the first data element,. More...
 
Type & first ()
 Return the first element of the list. More...
 
const Type & first () const
 Return first element of the list. More...
 
Type & last ()
 Return the last element of the list. More...
 
const Type & last () const
 Return the last element of the list. More...
 
void checkStart (const label start) const
 Check start is within valid range (0 ... size-1). More...
 
void checkSize (const label size) const
 Check size is within valid range (0 ... size). More...
 
void checkIndex (const label i) const
 Check index i is within valid range (0 ... size-1). More...
 
void writeEntry (Ostream &) const
 Write the UList as a dictionary entry. More...
 
void writeEntry (const word &keyword, Ostream &) const
 Write the UList as a dictionary entry with keyword. More...
 
void assign (const UList< Type > &)
 Assign elements to those from UList. More...
 
Type & operator[] (const label)
 Return element of UList. More...
 
const Type & operator[] (const label) const
 Return element of constant UList. More...
 
 operator const Foam::List< Type > & () const
 Allow cast to a const List<T>&. More...
 
void operator= (const Type &)
 Assignment of all entries to the given value. More...
 
iterator begin ()
 Return an iterator to begin traversing the UList. More...
 
const_iterator begin () const
 Return const_iterator to begin traversing the constant UList. More...
 
iterator end ()
 Return an iterator to end traversing the UList. More...
 
const_iterator end () const
 Return const_iterator to end traversing the constant UList. More...
 
const_iterator cbegin () const
 Return const_iterator to begin traversing the constant UList. More...
 
const_iterator cend () const
 Return const_iterator to end traversing the constant UList. More...
 
reverse_iterator rbegin ()
 Return reverse_iterator to begin reverse traversing the UList. More...
 
const_reverse_iterator rbegin () const
 Return const_reverse_iterator to begin reverse traversing the UList. More...
 
reverse_iterator rend ()
 Return reverse_iterator to end reverse traversing the UList. More...
 
const_reverse_iterator rend () const
 Return const_reverse_iterator to end reverse traversing the UList. More...
 
const_reverse_iterator crbegin () const
 Return const_reverse_iterator to begin reverse traversing the UList. More...
 
const_reverse_iterator crend () const
 Return const_reverse_iterator to end reverse traversing the UList. More...
 
label size () const
 Return the number of elements in the UList. More...
 
label max_size () const
 Return size of the largest possible UList. More...
 
bool empty () const
 Return true if the UList is empty (ie, size() is zero). More...
 
void swap (UList< Type > &)
 Swap two ULists of the same type in constant time. More...
 
bool operator== (const UList< Type > &) const
 Equality operation on ULists of the same type. More...
 
bool operator!= (const UList< Type > &) const
 The opposite of the equality operation. Takes linear time. More...
 
bool operator< (const UList< Type > &) const
 Compare two ULists lexicographically. Takes linear time. More...
 
bool operator> (const UList< Type > &) const
 Compare two ULists lexicographically. Takes linear time. More...
 
bool operator<= (const UList< Type > &) const
 Return true if !(a > b). Takes linear time. More...
 
bool operator>= (const UList< Type > &) const
 Return true if !(a < b). Takes linear time. More...
 

Static Public Attributes

static scalar p0 = 2e-5
 Reference pressure. More...
 
- Static Public Attributes inherited from Field< Type >
static const char *const typeName
 

Additional Inherited Members

- Public Types inherited from Field< Type >
typedef pTraits< Type >::cmptType cmptType
 Component type. More...
 
typedef SubField< Type > subField
 Declare type of subField. More...
 
- Public Types inherited from List< Type >
typedef SubList< Type > subList
 Declare type of subList. More...
 
- Public Types inherited from UList< Type >
typedef Type value_type
 Type of values the UList contains. More...
 
typedef Type & reference
 Type that can be used for storing into. More...
 
typedef const Type & const_reference
 Type that can be used for storing into. More...
 
typedef label difference_type
 The type that can represent the difference between any two. More...
 
typedef label size_type
 The type that can represent the size of a UList. More...
 
typedef Type * iterator
 Random access iterator for traversing UList. More...
 
typedef const Type * const_iterator
 Random access iterator for traversing UList. More...
 
typedef Type * reverse_iterator
 Reverse iterator for reverse traversal of UList. More...
 
typedef const Type * const_reverse_iterator
 Reverse iterator for reverse traversal of constant UList. More...
 
- Static Public Member Functions inherited from Field< Type >
static const Field< Type > & null ()
 Return a null field. More...
 
template<class Type2 >
static tmp< Field< Type > > NewCalculatedType (const Field< Type2 > &f)
 Return a pointer to a new calculatedFvPatchFieldField created on. More...
 
- Static Public Member Functions inherited from List< Type >
static const List< Type > & null ()
 Return a null List. More...
 
- Static Public Member Functions inherited from UList< Type >
static const UList< Type > & null ()
 Return a null UList. More...
 
- Protected Member Functions inherited from List< Type >
void size (const label)
 Override size to be inconsistent with allocated storage. More...
 

Detailed Description

FFT of the pressure field.

Source files

Definition at line 49 of file noiseFFT.H.

Constructor & Destructor Documentation

noiseFFT ( const scalar  deltat,
const scalarField pressure 
)

Construct from pressure field.

Definition at line 41 of file noiseFFT.C.

noiseFFT ( Istream )

Construct from Istream.

noiseFFT ( const fileName pFileName,
const label  skip = 0 
)

Construct from pressure field file name.

Definition at line 51 of file noiseFFT.C.

References IOstream::eof(), Foam::exit(), Foam::FatalError, FatalErrorIn, IOstream::good(), List< T >::size(), Field< Type >::T(), and List< Type >::transfer().

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Member Function Documentation

Foam::graph pt ( ) const

Return the graph of p(t)

Definition at line 108 of file noiseFFT.C.

References forAll, List< Type >::size(), and noiseFFT::window().

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Foam::tmp< Foam::scalarField > window ( const label  N,
const label  n 
) const

Return the nth window.

Definition at line 128 of file noiseFFT.C.

References Foam::endl(), Foam::exit(), Foam::FatalError, FatalErrorIn, forAll, N, UList< Type >::operator[](), and List< Type >::size().

Referenced by noiseFFT::meanPf(), noiseFFT::pt(), and noiseFFT::RMSmeanPf().

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Foam::tmp< Foam::scalarField > Hanning ( const label  N) const

Return the Hanning window function.

Definition at line 159 of file noiseFFT.C.

References Foam::cos(), forAll, noiseFFT::Pf(), Field< Type >::T(), and Foam::constant::mathematical::twoPi().

Referenced by noiseFFT::meanPf(), and noiseFFT::RMSmeanPf().

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Foam::tmp< Foam::scalarField > Pf ( const tmp< scalarField > &  pn) const

Return the fft of the given pressure data.

Definition at line 174 of file noiseFFT.C.

References tmp< T >::clear(), Foam::mag(), noiseFFT::meanPf(), Foam::ReComplexField(), fft::reverseTransform(), List< Type >::size(), and Foam::sqrt().

Referenced by noiseFFT::Hanning(), noiseFFT::meanPf(), noiseFFT::Pdelta(), and noiseFFT::RMSmeanPf().

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Foam::graph meanPf ( const label  N,
const label  nw 
) const

Return the multi-window mean fft of the complete pressure data.

Definition at line 209 of file noiseFFT.C.

References Foam::exit(), f(), Foam::FatalError, FatalErrorIn, forAll, noiseFFT::Hanning(), Foam::nl, nw, noiseFFT::Pf(), noiseFFT::RMSmeanPf(), List< T >::size(), List< Type >::size(), and noiseFFT::window().

Referenced by noiseFFT::Pf().

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Foam::graph RMSmeanPf ( const label  N,
const label  nw 
) const

Return the multi-window RMS mean fft of the complete pressure data.

Definition at line 255 of file noiseFFT.C.

References Foam::endl(), Foam::exit(), f(), Foam::FatalError, FatalErrorIn, forAll, noiseFFT::Hanning(), nw, noiseFFT::Pf(), List< T >::size(), List< Type >::size(), Foam::sqr(), Foam::sqrt(), and noiseFFT::window().

Referenced by noiseFFT::meanPf().

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Foam::graph Lf ( const graph gPf) const

Return the narrow-band PFL (pressure-fluctuation level) spectrum.

Definition at line 300 of file noiseFFT.C.

References noiseFFT::Ldelta(), Foam::log10(), noiseFFT::p0, graph::x(), and graph::y().

Referenced by noiseFFT::Ldelta(), and noiseFFT::Lsum().

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Foam::graph Ldelta ( const graph gLf,
const scalar  f1,
const scalar  fU 
) const

Return the one-third-octave-band PFL spectrum.

starting at octave with mean frequency f1

Definition at line 314 of file noiseFFT.C.

References Foam::cbrt(), f(), noiseFFT::Lf(), Foam::log10(), noiseFFT::Pdelta(), Foam::pow(), List< T >::setSize(), List< T >::size(), Foam::sqrt(), graph::x(), and graph::y().

Referenced by noiseFFT::Lf().

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Foam::graph Pdelta ( const graph gLf,
const scalar  f1,
const scalar  fU 
) const

Return the one-third-octave-band pressure spectrum.

starting at octave with mean frequency f1

Definition at line 370 of file noiseFFT.C.

References Foam::cbrt(), f(), noiseFFT::Pf(), List< T >::setSize(), List< T >::size(), Foam::sqr(), Foam::sqrt(), graph::x(), and graph::y().

Referenced by noiseFFT::Ldelta().

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Foam::scalar Lsum ( const graph gLf) const

Return the total PFL as the sum of Lf over all frequencies.

Definition at line 425 of file noiseFFT.C.

References forAll, noiseFFT::Lf(), Foam::log10(), Foam::pow(), and graph::y().

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Foam::scalar dbToPa ( const scalar  db) const

Convert the db into Pa.

Definition at line 442 of file noiseFFT.C.

References noiseFFT::p0, and Foam::pow().

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Foam::tmp< Foam::scalarField > dbToPa ( const tmp< scalarField > &  db) const

Convert the db-field into Pa.

Definition at line 449 of file noiseFFT.C.

References noiseFFT::p0, and Foam::pow().

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Member Data Documentation

Foam::scalar p0 = 2e-5
static

Reference pressure.

Definition at line 62 of file noiseFFT.H.

Referenced by noiseFFT::dbToPa(), and noiseFFT::Lf().


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