#include <deal.II/base/flow_function.h>

Inheritance diagram for Functions::FlowFunction< dim >:

Public Member Functions
	FlowFunction ()

virtual	~FlowFunction () override=default

void	pressure_adjustment (double p)

virtual void	vector_values (const std::vector< Point< dim >> &points, std::vector< std::vector< double >> &values) const override=0

virtual void	vector_gradients (const std::vector< Point< dim >> &points, std::vector< std::vector< Tensor< 1, dim >>> &gradients) const override=0

virtual void	vector_laplacians (const std::vector< Point< dim >> &points, std::vector< std::vector< double >> &values) const =0

virtual void	vector_value (const Point< dim > &points, Vector< double > &value) const override

virtual double	value (const Point< dim > &points, const unsigned int component) const override

virtual void	vector_value_list (const std::vector< Point< dim >> &points, std::vector< Vector< double >> &values) const override

virtual void	vector_laplacian_list (const std::vector< Point< dim >> &points, std::vector< Vector< double >> &values) const override

Public Member Functions inherited from Function< dim >
	Function (const unsigned int n_components=1, const time_type initial_time=0.0)

virtual	~Function () override=0

Function &	operator= (const Function &f)

virtual void	value_list (const std::vector< Point< dim >> &points, std::vector< double > &values, const unsigned int component=0) const

virtual Tensor< 1, dim, double >	gradient (const Point< dim > &p, const unsigned int component=0) const

virtual void	vector_gradient (const Point< dim > &p, std::vector< Tensor< 1, dim, double >> &gradients) const

virtual void	gradient_list (const std::vector< Point< dim >> &points, std::vector< Tensor< 1, dim, double >> &gradients, const unsigned int component=0) const

virtual void	vector_gradients (const std::vector< Point< dim >> &points, std::vector< std::vector< Tensor< 1, dim, double >>> &gradients) const

virtual void	vector_gradient_list (const std::vector< Point< dim >> &points, std::vector< std::vector< Tensor< 1, dim, double >>> &gradients) const

virtual double	laplacian (const Point< dim > &p, const unsigned int component=0) const

virtual void	vector_laplacian (const Point< dim > &p, Vector< double > &values) const

virtual void	laplacian_list (const std::vector< Point< dim >> &points, std::vector< double > &values, const unsigned int component=0) const

virtual SymmetricTensor< 2, dim, double >	hessian (const Point< dim > &p, const unsigned int component=0) const

virtual void	vector_hessian (const Point< dim > &p, std::vector< SymmetricTensor< 2, dim, double >> &values) const

virtual void	hessian_list (const std::vector< Point< dim >> &points, std::vector< SymmetricTensor< 2, dim, double >> &values, const unsigned int component=0) const

virtual void	vector_hessian_list (const std::vector< Point< dim >> &points, std::vector< std::vector< SymmetricTensor< 2, dim, double >>> &values) const

std::size_t	memory_consumption () const

Public Member Functions inherited from FunctionTime< Number >
	FunctionTime (const Number initial_time=Number(0.0))

virtual	~FunctionTime ()=default

Number	get_time () const

virtual void	set_time (const Number new_time)

virtual void	advance_time (const Number delta_t)

Public Member Functions inherited from Subscriptor
	Subscriptor ()

	Subscriptor (const Subscriptor &)

	Subscriptor (Subscriptor &&) noexcept

virtual	~Subscriptor ()

Subscriptor &	operator= (const Subscriptor &)

Subscriptor &	operator= (Subscriptor &&) noexcept

void	subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

void	unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

unsigned int	n_subscriptions () const

template<typename StreamType >
void	list_subscribers (StreamType &stream) const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

Protected Attributes
double	mean_pressure

Private Attributes
Threads::Mutex	mutex

std::vector< std::vector< double > >	aux_values

std::vector< std::vector< Tensor< 1, dim > > >	aux_gradients

Additional Inherited Members
Public Types inherited from Function< dim >
using	time_type = typename FunctionTime< typename numbers::NumberTraits< double >::real_type >::time_type

Public Types inherited from FunctionTime< Number >
using	time_type = Number

Static Public Member Functions inherited from Subscriptor
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

Public Attributes inherited from Function< dim >
const unsigned int	n_components

Static Public Attributes inherited from Function< dim >
static const unsigned int	dimension

Detailed Description

template<int dim>
class Functions::FlowFunction< dim >

Base class for analytic solutions to incompressible flow problems.

Additional to the Function interface, this function provides for an offset of the pressure: if the pressure of the computed solution has an integral mean value different from zero, this value can be given to pressure_adjustment() in order to compute correct pressure errors.

Note: Derived classes should implement pressures with integral mean value zero always.; Thread safety: Some of the functions make use of internal data to compute values. Therefore, every thread should obtain its own object of derived classes.

Author: Guido Kanschat, 2007

Definition at line 49 of file flow_function.h.

Constructor & Destructor Documentation

◆ FlowFunction()

template<int dim>

Functions::FlowFunction< dim >::FlowFunction ( )

Constructor, setting up some internal data structures.

Definition at line 31 of file flow_function.cc.

◆ ~FlowFunction()

template<int dim>

virtual Functions::FlowFunction< dim >::~FlowFunction ( )

overridevirtualdefault

Virtual destructor.

Member Function Documentation

◆ pressure_adjustment()

template<int dim>

void Functions::FlowFunction< dim >::pressure_adjustment ( double p )

Store an adjustment for the pressure function, such that its mean value is p.

Definition at line 42 of file flow_function.cc.

◆ vector_values()

template<int dim>

virtual void Functions::FlowFunction< dim >::vector_values	(	const std::vector< Point< dim >> &	points,
		std::vector< std::vector< double >> &	values
	)		const

overridepure virtual

Values in a structure more suitable for vector valued functions. The outer vector is indexed by solution component, the inner by quadrature point.

Reimplemented from Function< dim >.

Implemented in Functions::StokesCosine< dim >, and Functions::PoisseuilleFlow< dim >.

◆ vector_gradients()

template<int dim>

virtual void Functions::FlowFunction< dim >::vector_gradients	(	const std::vector< Point< dim >> &	points,
		std::vector< std::vector< Tensor< 1, dim >>> &	gradients
	)		const

overridepure virtual

Gradients in a structure more suitable for vector valued functions. The outer vector is indexed by solution component, the inner by quadrature point.

Implemented in Functions::StokesCosine< dim >, and Functions::PoisseuilleFlow< dim >.

◆ vector_laplacians()

template<int dim>

virtual void Functions::FlowFunction< dim >::vector_laplacians	(	const std::vector< Point< dim >> &	points,
		std::vector< std::vector< double >> &	values
	)		const

pure virtual

Force terms in a structure more suitable for vector valued functions. The outer vector is indexed by solution component, the inner by quadrature point.

Warning: This is not the true Laplacian, but the force term to be used as right hand side in Stokes' equations

Implemented in Functions::StokesCosine< dim >, and Functions::PoisseuilleFlow< dim >.

◆ vector_value()

template<int dim>

void Functions::FlowFunction< dim >::vector_value	(	const Point< dim > &	p,
		Vector< double > &	values
	)		const

overridevirtual

Return all components of a vector-valued function at a given point.

values shall have the right size beforehand, i.e. n_components.

The default implementation will call value() for each component.

Reimplemented from Function< dim >.

Definition at line 78 of file flow_function.cc.

◆ value()

template<int dim>

double Functions::FlowFunction< dim >::value	(	const Point< dim > &	p,
		const unsigned int	component
	)		const

overridevirtual

Return the value of the function at the given point. Unless there is only one component (i.e. the function is scalar), you should state the component you want to have evaluated; it defaults to zero, i.e. the first component.

Reimplemented from Function< dim >.

Definition at line 103 of file flow_function.cc.

◆ vector_value_list()

template<int dim>

void Functions::FlowFunction< dim >::vector_value_list	(	const std::vector< Point< dim >> &	points,
		std::vector< Vector< double >> &	values
	)		const

overridevirtual

Set values to the point values of the function at the points. It is assumed that values already has the right size, i.e. the same size as the points array, and that all elements be vectors with the same number of components as this function has.

By default, this function repeatedly calls vector_value() for each point separately, to fill the output array.

Reimplemented from Function< dim >.

Definition at line 50 of file flow_function.cc.

◆ vector_laplacian_list()

template<int dim>

void Functions::FlowFunction< dim >::vector_laplacian_list	(	const std::vector< Point< dim >> &	points,
		std::vector< Vector< double >> &	values
	)		const

overridevirtual

The force term in the momentum equation.

Reimplemented from Function< dim >.

Definition at line 153 of file flow_function.cc.

Member Data Documentation

◆ mean_pressure

template<int dim>

double Functions::FlowFunction< dim >::mean_pressure

protected

Mean value of the pressure to be added by derived classes.

Definition at line 125 of file flow_function.h.

◆ mutex

template<int dim>

Threads::Mutex Functions::FlowFunction< dim >::mutex

mutableprivate

A mutex that guards the following scratch arrays.

Definition at line 131 of file flow_function.h.

◆ aux_values

template<int dim>

std::vector<std::vector<double> > Functions::FlowFunction< dim >::aux_values

mutableprivate

Auxiliary values for the usual Function interface.

Definition at line 136 of file flow_function.h.

◆ aux_gradients

template<int dim>

std::vector<std::vector<Tensor<1, dim> > > Functions::FlowFunction< dim >::aux_gradients

mutableprivate

Auxiliary values for the usual Function interface.

Definition at line 141 of file flow_function.h.

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

deal.II/base/flow_function.h
source/base/flow_function.cc

Public Member Functions

Protected Attributes

Private Attributes

Additional Inherited Members

Detailed Description

template<int dim> class Functions::FlowFunction< dim >

Constructor & Destructor Documentation

◆ FlowFunction()

◆ ~FlowFunction()

Member Function Documentation

◆ pressure_adjustment()

◆ vector_values()

◆ vector_gradients()

◆ vector_laplacians()

◆ vector_value()

◆ value()

◆ vector_value_list()

◆ vector_laplacian_list()

Member Data Documentation

◆ mean_pressure

◆ mutex

◆ aux_values

◆ aux_gradients

template<int dim>
class Functions::FlowFunction< dim >