gridripper::amr1d::Integrator Class Reference

Time integrator. More...

Inheritance diagram for gridripper::amr1d::Integrator:

List of all members.

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

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Detailed Description

Time integrator.

Numerical method to integrate a PDE on the grid.

Version:

0.5, 02/21/2009

Author:

Peter Csizmadia

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Member Function Documentation

final Grad gridripper::amr1d::Integrator::getGrad

(

)

[inline]

Gets the numerical differentiation scheme.

Returns:

the fourth order differentiation scheme

final Grid.Interpolator gridripper::amr1d::Integrator::getInterpolator

(

)

[inline]

Gets the margin interpolator for this numerical method.

Returns:

the interpolator

final int gridripper::amr1d::Integrator::getInterpolatorType

(

)

[inline]

Gets the interpolator type.

Returns:

the interpolator type

final int gridripper::amr1d::Integrator::getInterpolationBufferSize

(

)

[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

abstract 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::FirstOrder, gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::LW2, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

abstract void gridripper::amr1d::Integrator::richardson	(	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::FirstOrder, gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::LW2, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

abstract void gridripper::amr1d::Integrator::getResult	(	int	i,
		double[]	w
	)			[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::FirstOrder, gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::LW2, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

abstract int gridripper::amr1d::Integrator::getNumVelocity

(

)

[pure virtual]

Gets the numerical error propagation velocity.

Returns:

error propogation velocity in points/time step

Implemented in gridripper::amr1d::gridint::FirstOrder, gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::LW2, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

abstract Integrator gridripper::amr1d::Integrator::createIntegrator	(	Grid	g,
		Sigma	sigma
	)			[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::FirstOrder, gridripper::amr1d::gridint::ICN, gridripper::amr1d::gridint::LW2, gridripper::amr1d::gridint::RK2, and gridripper::amr1d::gridint::RK4.

final double gridripper::amr1d::Integrator::getDeltaT

(

)

[inline]

Gets the time step.

Returns:

the time step

final void gridripper::amr1d::Integrator::setDeltaT

(

double

dt

)

[inline]

Sets the time step.

Parameters:

dt

the time step

final Grid gridripper::amr1d::Integrator::getGrid

(

)

[inline]

Gets the grid.

Returns:

the grid

final PDE gridripper::amr1d::Integrator::getPDE

(

)

[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.java