LinearODESolver Class Reference

Class for linear ODE solver. More...

#include <linear_ode_solver.hh>

Public Member Functions
	LinearODESolver ()
	~LinearODESolver ()
void	set_system_matrix (const arma::mat &matrix)
	Sets the matrix of ODE system. More...
void	set_step (double step)
	Sets the step of the numerical method. More...
void	update_solution (arma::vec &init_vec, arma::vec &output_vec)
	Updates solution of the ODEs system. More...
virtual bool	evaluate_time_constraint (FMT_UNUSED double &time_constraint)
	Estimate upper bound for time step. Return true if constraint was set. More...

Protected Attributes
arma::mat	system_matrix_
	the square matrix of ODE system More...
arma::mat	solution_matrix_
	the square solution matrix (exponential of system matrix) More...
arma::vec	rhs_
	the column vector of RHS values (not used currently) More...
double	step_
	the step of the numerical method More...
bool	step_changed_
	flag is true if the step has been changed More...
bool	system_matrix_changed_
	Indicates that the system_matrix_ was recently updated. More...

Detailed Description

Class for linear ODE solver.

This class represents the solver of a system of linear ordinary differential equations with constant coefficients which uses matrix exponential to compute the solution at given times.

Definition at line 38 of file linear_ode_solver.hh.

Constructor & Destructor Documentation

LinearODESolver::LinearODESolver

(

)

Definition at line 26 of file linear_ode_solver.cc.

LinearODESolver::~LinearODESolver

(

)

Definition at line 32 of file linear_ode_solver.cc.

Member Function Documentation

virtual bool LinearODESolver::evaluate_time_constraint ( FMT_UNUSED double &  time_constraint )

inlinevirtual

Estimate upper bound for time step. Return true if constraint was set.

Definition at line 56 of file linear_ode_solver.hh.

void LinearODESolver::set_step

(

double

step

)

Sets the step of the numerical method.

Definition at line 42 of file linear_ode_solver.cc.

void LinearODESolver::set_system_matrix

(

const arma::mat &

matrix

)

Sets the matrix of ODE system.

Definition at line 36 of file linear_ode_solver.cc.

void LinearODESolver::update_solution	(	arma::vec &	init_vec,
		arma::vec &	output_vec
	)

Updates solution of the ODEs system.

Parameters

init_vec	is the column initial vector
output_vec	is the column output vector containing the result

Definition at line 48 of file linear_ode_solver.cc.

Member Data Documentation

arma::vec LinearODESolver::rhs_

protected

the column vector of RHS values (not used currently)

Definition at line 61 of file linear_ode_solver.hh.

arma::mat LinearODESolver::solution_matrix_

protected

the square solution matrix (exponential of system matrix)

Definition at line 60 of file linear_ode_solver.hh.

double LinearODESolver::step_

protected

the step of the numerical method

Definition at line 62 of file linear_ode_solver.hh.

bool LinearODESolver::step_changed_

protected

flag is true if the step has been changed

Definition at line 63 of file linear_ode_solver.hh.

arma::mat LinearODESolver::system_matrix_

protected

the square matrix of ODE system

Definition at line 59 of file linear_ode_solver.hh.

bool LinearODESolver::system_matrix_changed_

protected

Indicates that the system_matrix_ was recently updated.

Definition at line 64 of file linear_ode_solver.hh.

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

• /opt/flow123d/flow123d/src/reaction/linear_ode_solver.hh
• /opt/flow123d/flow123d/src/reaction/linear_ode_solver.cc