Fem Class Reference

#include <fem.h>

Public Member Functions
	Fem (Settings &mySets, timing &t_prm)
	~Fem ()
void	energy (double const t, Settings &settings)
void	evolution (void)
void	saver (Settings &settings, timing const &t_prm, std::ofstream &fout, const int nt, std::vector< Eigen::Vector3d > &s) const
bool	recenter (double thres, char recentering_direction)
int	time_integration (Settings &settings, LinAlgebra &linAlg, spinAcc &spinAcc_solver, scal_fmm::fmm &myFMM, timing &t_prm, int &nt)

Public Attributes
double	vmax
std::array< double, NB_ENERGY_TERMS >	E
double	DW_dir
double	Etot0
double	Etot
Mesh::mesh	msh

Private Member Functions
void	direction (enum Nodes::index idx_dir)
void	compute_all (Settings &settings, spinAcc &spinAcc_solver, scal_fmm::fmm &myFMM, const double t)

Private Attributes
bool	recenter_mem
ANNkd_tree *	kdtree
ANNpointArray	pts

Detailed Description

class container to grab altogether all parameters of a simulation, including mesh geometry, containers for the mesh

Constructor & Destructor Documentation

Fem()

Fem::Fem ( Settings &  mySets, timing &  t_prm  )

inline

constructor: call mesh constructor, initialize pts,kdtree and many inner variables

~Fem()

Fem::~Fem ( )

inline

destructor

Member Function Documentation

compute_all()

void Fem::compute_all ( Settings &  settings, spinAcc &  spinAcc_solver, scal_fmm::fmm &  myFMM, const double  t  )

inlineprivate

compute demagnetizing field, energies, and prepare for next time step quantitites at time t

Parameters

[in]	settings
	spinAcc_solver	[in|out]
	myFMM	[in|out]
[in]	t

direction()

void Fem::direction ( enum Nodes::index  idx_dir )

private

find direction of motion of DW

Parameters

[in]

idx_dir

energy()

void Fem::energy	(	double const	t,
		Settings &	settings
	)

computes all the energies

Parameters

[in]	t	time in second, used to compute zeeman contribution if applied field is time dependant
[in]	settings

evolution()

void Fem::evolution ( void  )

inline

time evolution : one step in time

recenter()

bool Fem::recenter	(	double	thres,
		char	recentering_direction
	)

recentering algorithm for the study of the motion of a domain wall.

if \( D_i>0 \) if \( D_i<0 \)

<-------------—|----—> ----—>|<-------------— \( m_i = < u_i > < 0 \)

or or

-------------—>|<----— <----—|-------------—> \( m_i = <u_i> > 0 \)

Parameters

[in]	thres	threshold parameter
[in]	recentering_direction	X|Y|Z

saver()

void Fem::saver	(	Settings &	settings,
		timing const &	t_prm,
		std::ofstream &	fout,
		const int	nt,
		std::vector< Eigen::Vector3d > &	s
	)		const

saving function for a solution

Parameters

[in]	settings
[in]	t_prm
[out]	fout
[in]	nt
[in]	s

time_integration()

int Fem::time_integration	(	Settings &	settings,
		LinAlgebra &	linAlg,
		spinAcc &	spinAcc_solver,
		scal_fmm::fmm &	myFMM,
		timing &	t_prm,
		int &	nt
	)

performs the time integration of the LLG problem, with spin accumulation if any

Parameters

[in]	settings
[in]	linAlg
[in]	spinAcc_solver
[in]	myFMM
[in]	t_prm
[out]	nt	number of time steps performed

Member Data Documentation

DW_dir

double Fem::DW_dir

direction of the domain wall

E

std::array<double,NB_ENERGY_TERMS> Fem::E

current iteration energies

Etot

double Fem::Etot

total energy

Etot0

double Fem::Etot0

initial total energy

kdtree

ANNkd_tree* Fem::kdtree

private

ANN kdtree to find efficiently the closest set of nodes to a physical point in the mesh

msh

Mesh::mesh Fem::msh

mesh object to store nodes, fac, tet, and others geometrical values related to the mesh

pts

ANNpointArray Fem::pts

private

container for the building of the kdtree (handled by ANN library)

recenter_mem

bool Fem::recenter_mem

private

flag to know if kdtree and pts are allocated

vmax

double Fem::vmax

maximum speed of magnetization

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

• fem.h
• energy.cpp
• recentering.cpp
• save.cpp
• time_integration.cpp