AdaptivePreconditioner a preconditioner designed for use with large mechanisms that leverages sparse solvers. More...

#include <AdaptivePreconditioner.h>

Inheritance diagram for AdaptivePreconditioner:

Detailed Description

AdaptivePreconditioner a preconditioner designed for use with large mechanisms that leverages sparse solvers.

It does this by pruning the preconditioner by a threshold value. It also neglects pressure dependence and third body contributions in its formation and has a finite difference approximation for temperature.

Definition at line 26 of file AdaptivePreconditioner.h.

Public Member Functions
void	initialize (size_t networkSize) override
	Called during setup for any processes that need to be completed prior to setup functions used in sundials. More...

void	reset () override
	Reset preconditioner parameters as needed. More...

void	setup () override
	Perform preconditioner specific post-reactor setup operations such as factorize. More...

void	solve (const size_t stateSize, double rhs_vector, double output) override
	Solve a linear system Ax=b where A is the preconditioner. More...

void	setValue (size_t row, size_t col, double value) override
	Set a value at the specified row and column of the jacobian triplet vector. More...

void	stateAdjustment (vector< double > &state) override
	Adjust the state vector based on the preconditioner, e.g., Adaptive preconditioning uses a strictly positive composition when preconditioning which is handled by this function. More...

void	updatePreconditioner () override
	Transform Jacobian vector and write into preconditioner, P = (I - gamma * J) More...

void	prunePreconditioner ()
	Prune preconditioner elements. More...

Eigen::SparseMatrix< double >	jacobian ()
	Return semi-analytical Jacobian of an AdaptivePreconditioner object. More...

Eigen::SparseMatrix< double >	matrix ()
	Return the internal preconditioner matrix. More...

double	threshold ()
	Get the threshold value for setting elements. More...

double	ilutFillFactor ()
	Get ILUT fill factor. More...

double	ilutDropTol ()
	Get ILUT drop tolerance. More...

void	setThreshold (double threshold)
	Set the threshold value to compare elements against. More...

void	setIlutDropTol (double droptol)
	Set drop tolerance for ILUT. More...

void	setIlutFillFactor (int fillFactor)
	Set the fill factor for ILUT solver. More...

void	printPreconditioner () override
	Print preconditioner contents. More...

void	printJacobian ()
	Print jacobian contents. More...

Public Member Functions inherited from PreconditionerBase
string	preconditionerSide () const
	Get preconditioner application side for CVODES. More...

virtual void	setPreconditionerSide (const string &preconSide)

virtual void	setGamma (double gamma)
	Set gamma used in preconditioning. More...

virtual double	gamma ()
	Get gamma used in preconditioning. More...

virtual void	setAbsoluteTolerance (double atol)
	Set the absolute tolerance in the solver outside of the network initialization. More...

Protected Attributes
double	m_fill_factor = 0
	ILUT fill factor. More...

double	m_drop_tol = 0
	ILUT drop tolerance. More...

vector< Eigen::Triplet< double > >	m_jac_trips
	Vector of triples representing the jacobian used in preconditioning. More...

Eigen::SparseMatrix< double >	m_identity
	Storage of appropriately sized identity matrix for making the preconditioner. More...

Eigen::SparseMatrix< double >	m_precon_matrix
	Container that is the sparse preconditioner. More...

Eigen::IncompleteLUT< double >	m_solver
	Solver used in solving the linear system. More...

double	m_threshold = 0.0
	Minimum value a non-diagonal element must be to be included in the preconditioner. More...

double	m_prune_precon = true
	Bool set whether to prune the matrix or not. More...

Protected Attributes inherited from PreconditionerBase
size_t	m_dim
	Dimension of the preconditioner. More...

double	m_gamma = 1.0
	gamma value used in M = I - gamma*J More...

bool	m_init = false
	bool saying whether or not the preconditioner is initialized More...

double	m_atol = 0
	Absolute tolerance of the ODE solver. More...

string	m_precon_side = "none"

Member Function Documentation

◆ initialize()

void initialize ( size_t networkSize )

overridevirtual

Called during setup for any processes that need to be completed prior to setup functions used in sundials.

Parameters

networkSize the number of variables in the associated reactor network

Reimplemented from PreconditionerBase.

Definition at line 29 of file AdaptivePreconditioner.cpp.

◆ reset()

void reset ( )

inlineoverridevirtual

Reset preconditioner parameters as needed.

Reimplemented from PreconditionerBase.

Definition at line 33 of file AdaptivePreconditioner.h.

◆ setup()

void setup ( )

overridevirtual

Perform preconditioner specific post-reactor setup operations such as factorize.

Reimplemented from PreconditionerBase.

Definition at line 57 of file AdaptivePreconditioner.cpp.

◆ solve()

void solve	(	const size_t	stateSize,
		double *	rhs_vector,
		double *	output
	)

overridevirtual

Solve a linear system Ax=b where A is the preconditioner.

Parameters

[in]	stateSize	length of the rhs and output vectors
[in]	rhs_vector	right hand side vector used in linear system
[out]	output	output vector for solution

Reimplemented from PreconditionerBase.

Definition at line 96 of file AdaptivePreconditioner.cpp.

◆ setValue()

void setValue	(	size_t	row,
		size_t	col,
		double	value
	)

overridevirtual

Set a value at the specified row and column of the jacobian triplet vector.

Parameters

row	row in the jacobian matrix
col	column in the jacobian matrix
value	value of the element at row and col

Reimplemented from PreconditionerBase.

Definition at line 17 of file AdaptivePreconditioner.cpp.

◆ stateAdjustment()

void stateAdjustment ( vector< double > & state )

overridevirtual

Adjust the state vector based on the preconditioner, e.g., Adaptive preconditioning uses a strictly positive composition when preconditioning which is handled by this function.

Parameters

state a vector containing the state to be updated

Reimplemented from PreconditionerBase.

Definition at line 22 of file AdaptivePreconditioner.cpp.

◆ updatePreconditioner()

void updatePreconditioner ( )

overridevirtual

Transform Jacobian vector and write into preconditioner, P = (I - gamma * J)

Reimplemented from PreconditionerBase.

Definition at line 72 of file AdaptivePreconditioner.cpp.

◆ prunePreconditioner()

void prunePreconditioner ( )

Prune preconditioner elements.

Definition at line 84 of file AdaptivePreconditioner.cpp.

◆ matrix()

Eigen::SparseMatrix<double> matrix ( )

inline

Return the internal preconditioner matrix.

Definition at line 60 of file AdaptivePreconditioner.h.

◆ threshold()

double threshold ( )

inline

Get the threshold value for setting elements.

Definition at line 66 of file AdaptivePreconditioner.h.

◆ ilutFillFactor()

double ilutFillFactor ( )

inline

Get ILUT fill factor.

Definition at line 69 of file AdaptivePreconditioner.h.

◆ ilutDropTol()

double ilutDropTol ( )

inline

Get ILUT drop tolerance.

Definition at line 72 of file AdaptivePreconditioner.h.

◆ setThreshold()

void setThreshold ( double threshold )

inline

Set the threshold value to compare elements against.

Parameters

threshold double value used in setting by threshold

Definition at line 76 of file AdaptivePreconditioner.h.

◆ setIlutDropTol()

void setIlutDropTol ( double droptol )

inline

Set drop tolerance for ILUT.

Parameters

droptol double value used in setting solver drop tolerance

Definition at line 83 of file AdaptivePreconditioner.h.

◆ setIlutFillFactor()

void setIlutFillFactor ( int fillFactor )

inline

Set the fill factor for ILUT solver.

Parameters

fillFactor fill in factor for ILUT solver

Definition at line 90 of file AdaptivePreconditioner.h.

◆ printPreconditioner()

void printPreconditioner ( )

overridevirtual

Print preconditioner contents.

Reimplemented from PreconditionerBase.

Definition at line 110 of file AdaptivePreconditioner.cpp.

◆ printJacobian()

void printJacobian ( )

Print jacobian contents.

Definition at line 117 of file AdaptivePreconditioner.cpp.

Member Data Documentation

◆ m_fill_factor

double m_fill_factor = 0

protected

ILUT fill factor.

Definition at line 103 of file AdaptivePreconditioner.h.

◆ m_drop_tol

double m_drop_tol = 0

protected

ILUT drop tolerance.

Definition at line 106 of file AdaptivePreconditioner.h.

◆ m_jac_trips

vector<Eigen::Triplet<double> > m_jac_trips

protected

Vector of triples representing the jacobian used in preconditioning.

Definition at line 109 of file AdaptivePreconditioner.h.

◆ m_identity

Eigen::SparseMatrix<double> m_identity

protected

Storage of appropriately sized identity matrix for making the preconditioner.

Definition at line 112 of file AdaptivePreconditioner.h.

◆ m_precon_matrix

Eigen::SparseMatrix<double> m_precon_matrix

protected

Container that is the sparse preconditioner.

Definition at line 115 of file AdaptivePreconditioner.h.

◆ m_solver

Eigen::IncompleteLUT<double> m_solver

protected

Solver used in solving the linear system.

Definition at line 118 of file AdaptivePreconditioner.h.

◆ m_threshold

double m_threshold = 0.0

protected

Minimum value a non-diagonal element must be to be included in the preconditioner.

Definition at line 122 of file AdaptivePreconditioner.h.

◆ m_prune_precon

double m_prune_precon = true

protected

Bool set whether to prune the matrix or not.

Definition at line 125 of file AdaptivePreconditioner.h.

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

Detailed Description

Public Member Functions

Protected Attributes

Member Function Documentation

◆ initialize()

◆ reset()

◆ setup()

◆ solve()

◆ setValue()

◆ stateAdjustment()

◆ updatePreconditioner()

◆ prunePreconditioner()

◆ matrix()

◆ threshold()

◆ ilutFillFactor()

◆ ilutDropTol()

◆ setThreshold()

◆ setIlutDropTol()

◆ setIlutFillFactor()

◆ printPreconditioner()

◆ printJacobian()

Member Data Documentation

◆ m_fill_factor

◆ m_drop_tol

◆ m_jac_trips

◆ m_identity

◆ m_precon_matrix

◆ m_solver

◆ m_threshold

◆ m_prune_precon