gridripper::amr1d::Integrator Class Reference

Time integrator. More...

#include <Integrator.h>

Inheritance diagram for gridripper::amr1d::Integrator:

List of all members.

Public Member Functions
Grad &	getGrad () const
	Gets the numerical differentiation scheme.
const GridInterpolator *	getInterpolator () const
	Gets the margin interpolator for this numerical method.
int	getInterpolatorType () const
	Gets the interpolator type.
int	getInterpolationBufferSize () const
	Gets the number of interpolation related additional points.
virtual void	integrate (int ir)=0
	Integrates a partial differential equation.
virtual void	richardson (const AMError &amerr, int ir)=0
	Richardson error estimation.
double	getError (int i) const
	Gets the Richardson error in the specified grid point.
void	setTimeStepCount (int tsc)
int	getTimeStepCount () const
virtual void	getResult (int i, tvalarray< GReal_t > &w) const =0
	Gets the result of the integration at the specified point.
virtual int	getNumVelocity () const =0
	Gets the numerical error propagation velocity.
virtual Integrator *	createIntegrator (Grid &g, const Sigma *sigma) const =0
	Creates a new integrator instance for the specified grid.
virtual Integrator *	cloneIntegrator (Grid &g) const =0
const Sigma &	getSigma () const
GReal_t	getDeltaT () const
	Gets the time step.
void	setDeltaT (GReal_t dt)
	Sets the time step.
Grid *	getGrid () const
	Gets the grid.
PDE &	getPDE () const
	Gets the PDE.
void	updateGrid (int ir)
Protected Member Functions
	Integrator (const Integrator &gi, Grid &g)
	Integrator (Grid *g, PDE &pde, const tvalarray< string > *optsarr, int deftype, Sigma *sigma)
	Integrator (Grid *g, PDE &pde, Grad *d, Grad *d2, int deftype, Sigma *sigma)
void	calcErrors (const AMError &amerr, const Grid &g, const Grid &g2, double c)
Protected Attributes
Grad *	gradOp
Grad *	gradOp2
int	timeStepCount
Friends
class	Grid

---

Detailed Description

Time integrator.

Numerical method to integrate a PDE on the grid.

Version:

0.5, 01/06/2009

Author:

Peter Csizmadia

---

Member Function Documentation

Grad& gridripper::amr1d::Integrator::getGrad

(

)

const [inline]

Gets the numerical differentiation scheme.

Returns:

the fourth order differentiation scheme

Reimplemented in gridripper::amr1d::gridint::ICN.

const GridInterpolator* gridripper::amr1d::Integrator::getInterpolator

(

)

const [inline]

Gets the margin interpolator for this numerical method.

Returns:

the interpolator

int gridripper::amr1d::Integrator::getInterpolatorType

(

)

const [inline]

Gets the interpolator type.

Returns:

the interpolator type

int gridripper::amr1d::Integrator::getInterpolationBufferSize

(

)

const [inline]

Gets the number of interpolation related additional points.

The margin of a refined parent grid must always be wide enough to make centered interpolation possible for its child grids. 4 additional points are needed for the 5th order interpolation.

Returns:

the number of additional points

virtual void gridripper::amr1d::Integrator::integrate

(

int

ir

)

[pure virtual]

Integrates a partial differential equation.

Parameters:

ir

refined step count (0...r-1)

Implemented in gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

virtual void gridripper::amr1d::Integrator::richardson	(	const AMError &	amerr,
		int	ir
	)			[pure virtual]

Richardson error estimation.

Parameters:

	amerr	the error calculation method
	ir	refined step count (0...r-1)

Implemented in gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

virtual void gridripper::amr1d::Integrator::getResult	(	int	i,
		tvalarray< GReal_t > &	w
	)			const [pure virtual]

Gets the result of the integration at the specified point.

Parameters:

	i	the grid point index
	w	the integration result will be copied here

Implemented in gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

virtual int gridripper::amr1d::Integrator::getNumVelocity

(

)

const [pure virtual]

Gets the numerical error propagation velocity.

Returns:

error propogation velocity in points/time step

Implemented in gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

virtual Integrator* gridripper::amr1d::Integrator::createIntegrator	(	Grid &	g,
		const Sigma *	sigma
	)			const [pure virtual]

Creates a new integrator instance for the specified grid.

Parameters:

	g	the grid
	sigma	dissipation term is multiplied by this factor

Implemented in gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

GReal_t gridripper::amr1d::Integrator::getDeltaT

(

)

const [inline]

Gets the time step.

Returns:

the time step

void gridripper::amr1d::Integrator::setDeltaT

(

GReal_t

dt

)

[inline]

Sets the time step.

Parameters:

dt

the time step

Grid* gridripper::amr1d::Integrator::getGrid

(

)

const [inline]

Gets the grid.

Returns:

the grid

PDE& gridripper::amr1d::Integrator::getPDE

(

)

const [inline]

Gets the PDE.

Returns:

the PDE

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

• gridripper/amr1d/Integrator.h