#include <ode.hpp>

Inheritance diagram for mfem::GeneralizedAlphaSolver:

Collaboration diagram for mfem::GeneralizedAlphaSolver:

Public Member Functions
	GeneralizedAlphaSolver (double rho=1.0)

void	Init (TimeDependentOperator &_f) override
	Associate a TimeDependentOperator with the ODE solver. More...

void	Step (Vector &x, double &t, double &dt) override
	Perform a time step from time t [in] to time t [out] based on the requested step size dt [in]. More...

int	GetMaxStateSize () override
	Function for getting and setting the state vectors. More...

int	GetStateSize () override

const Vector &	GetStateVector (int i) override

void	GetStateVector (int i, Vector &state) override

void	SetStateVector (int i, Vector &state) override

Public Member Functions inherited from mfem::ODESolver
	ODESolver ()

virtual void	Run (Vector &x, double &t, double &dt, double tf)
	Perform time integration from time t [in] to time tf [in]. More...

virtual	~ODESolver ()

Protected Member Functions
void	SetRhoInf (double rho_inf)

void	PrintProperties (std::ostream &out=mfem::out)

Protected Attributes
Vector	xdot

Vector	k

Vector	y

double	alpha_f

double	alpha_m

double	gamma

int	nstate

Protected Attributes inherited from mfem::ODESolver
TimeDependentOperator *	f
	Pointer to the associated TimeDependentOperator. More...

MemoryType	mem_type

Detailed Description

Generalized-alpha ODE solver from "A generalized-α method for integrating the filtered Navier-Stokes equations with a stabilized finite element method" by K.E. Jansen, C.H. Whiting and G.M. Hulbert.

Definition at line 466 of file ode.hpp.

Constructor & Destructor Documentation

mfem::GeneralizedAlphaSolver::GeneralizedAlphaSolver ( double rho = 1.0 )

inline

Definition at line 477 of file ode.hpp.

Member Function Documentation

int mfem::GeneralizedAlphaSolver::GetMaxStateSize ( )

inlineoverridevirtual

Function for getting and setting the state vectors.

Reimplemented from mfem::ODESolver.

Definition at line 483 of file ode.hpp.

int mfem::GeneralizedAlphaSolver::GetStateSize ( )

inlineoverridevirtual

Reimplemented from mfem::ODESolver.

Definition at line 484 of file ode.hpp.

const Vector & mfem::GeneralizedAlphaSolver::GetStateVector ( int i )

overridevirtual

Reimplemented from mfem::ODESolver.

Definition at line 699 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::GetStateVector	(	int	i,
		Vector &	state
	)

overridevirtual

Reimplemented from mfem::ODESolver.

Definition at line 707 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::Init ( TimeDependentOperator & f )

overridevirtual

Associate a TimeDependentOperator with the ODE solver.

This method has to be called:

Before the first call to Step().
When the dimensions of the associated TimeDependentOperator change.
When a time stepping sequence has to be restarted.
To change the associated TimeDependentOperator.

Reimplemented from mfem::ODESolver.

Definition at line 689 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::PrintProperties ( std::ostream & out = mfem::out )

protected

Definition at line 735 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::SetRhoInf ( double rho_inf )

protected

Definition at line 724 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::SetStateVector	(	int	i,
		Vector &	state
	)

overridevirtual

Reimplemented from mfem::ODESolver.

Definition at line 715 of file ode.cpp.

void mfem::GeneralizedAlphaSolver::Step	(	Vector &	x,
		double &	t,
		double &	dt
	)

overridevirtual

Perform a time step from time t [in] to time t [out] based on the requested step size dt [in].

Parameters

[in,out]	x	Approximate solution.
[in,out]	t	Time associated with the approximate solution x.
[in,out]	dt	Time step size.

The following rules describe the common behavior of the method:

The input x [in] is the approximate solution for the input time t [in].
The input dt [in] is the desired time step size, defining the desired target time: t [target] = t [in] + dt [in].
The output x [out] is the approximate solution for the output time t [out].
The output dt [out] is the last time step taken by the method which may be smaller or larger than the input dt [in] value, e.g. because of time step control.
The method may perform more than one time step internally; in this case dt [out] is the last internal time step size.
The output value of t [out] may be smaller or larger than t [target], however, it is not smaller than t [in] + dt [out], if at least one internal time step was performed.
The value x [out] may be obtained by interpolation using internally stored data.
In some cases, the contents of x [in] may not be used, e.g. when x [out] from a previous Step() call was obtained by interpolation.
In consecutive calls to this method, the output t [out] of one Step() call has to be the same as the input t [in] to the next Step() call.
If the previous rule has to be broken, e.g. to restart a time stepping sequence, then the ODE solver must be re-initialized by calling Init() between the two Step() calls.

Implements mfem::ODESolver.

Definition at line 762 of file ode.cpp.

Member Data Documentation

double mfem::GeneralizedAlphaSolver::alpha_f

protected

Definition at line 470 of file ode.hpp.

double mfem::GeneralizedAlphaSolver::alpha_m

protected

Definition at line 470 of file ode.hpp.

double mfem::GeneralizedAlphaSolver::gamma

protected

Definition at line 470 of file ode.hpp.

Vector mfem::GeneralizedAlphaSolver::k

mutableprotected

Definition at line 469 of file ode.hpp.

int mfem::GeneralizedAlphaSolver::nstate

protected

Definition at line 471 of file ode.hpp.

Vector mfem::GeneralizedAlphaSolver::xdot

mutableprotected

Definition at line 469 of file ode.hpp.

Vector mfem::GeneralizedAlphaSolver::y

mutableprotected

Definition at line 469 of file ode.hpp.

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

linalg/ode.hpp
linalg/ode.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation