Package pulse.problem.schemes.rte.dom

Class Discretisation

java.lang.Object

pulse.util.UpwardsNavigable

pulse.util.Group

pulse.util.Accessible

pulse.util.PropertyHolder

pulse.problem.schemes.rte.dom.Discretisation

All Implemented Interfaces:

Serializable, Descriptive

public class Discretisation
extends PropertyHolder

A class specifying the discretisation (both spatial and angular) scheme used to solve the radiative transfer equation with the discrete ordinates method. Has references to the grid and ordinate sets and the discrete quantities appearing in the calculations. Introduces methods to calculate the moments and intensities based on the discrete ordinates method.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
Discretisation(ThermoOpticalProperties properties)	Constructs a DiscreteIntensities with the default OrdinateSet and a new uniform grid.

Method Summary

Modifier and Type	Method	Description
double	firstMoment(double[][] ext, int j)	Calculates the first moment $\sum$iwiμiextij, which can be applied e.g.
double	flux(int j)	Calculates the net flux at j.
double	flux(int j, int startInclusive, int endExclusive)	Calculates the partial flux by performing a simple summation bounded by the arguments.
double	fluxLeft(BlackbodySpectrum emissionFunction)	Calculates the flux at the left boundary using an alternative formula.
double	fluxRight(BlackbodySpectrum emissionFunction)	Calculates the flux at the right boundary using an alternative formula.
String	getDescriptor()	If not null, will return the prefix, otherwise calls the superclass method.
StretchedGrid	getGrid()
OrdinateSet	getOrdinates()
DiscreteSelector<OrdinateSet>	getQuadratureSelector()
DiscreteQuantities	getQuantities()
double	incidentRadation(int j)	Calculates the incident radiation $\sum$iwi Iij, which is the zeroth moment of the intensities.
double	incidentRadiation(int j, int startInclusive, int endExclusive)	Calculates the incident radiation $\sum$iwi Iij, by performing simple summation for node points between startInclusive and endExclusive.
void	intensitiesLeftBoundary(BlackbodySpectrum ef)	Calculates the reflected intensity (positive angles, first half of indices) at the left boundary (τ = 0).
void	intensitiesRightBoundary(BlackbodySpectrum ef)	Calculates the reflected intensity (negative angles, second half of indices) at the right boundary (τ = τ0).
List<Property>	listedTypes()	By default, collects a list of default properties corresponding to types defined by listedKeywords().
void	set(NumericPropertyKeyword type, NumericProperty property)	An abstract method, which must be overriden to gain access over setting the values of all relevant (selected by the programmer) NumericProperties in subclasses of Accessible.
protected void	setEmissivity(double emissivity)
void	setGrid(StretchedGrid grid)
void	setOrdinateSet(OrdinateSet set)
String	toString()

Methods inherited from class pulse.util.PropertyHolder

addListener, areDetailsHidden, data, describe, firePropertyChanged, getListeners, getPrefix, ignoreSiblings, initListeners, isListedNumericType, isListedParameter, listedKeywords, numericData, parameterListChanged, removeListeners, setPrefix, updateProperties, updateProperty

Methods inherited from class pulse.util.Accessible

accessibleChildren, genericProperties, genericProperty, numericProperties, numericProperty, property, update, update

Methods inherited from class pulse.util.Group

access, children, contents, getSimpleName, subgroups

Methods inherited from class pulse.util.UpwardsNavigable

addHierarchyListener, getHierarchyListeners, getParent, identify, removeHierarchyListener, removeHierarchyListeners, setParent, specificAncestor, tellParent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Discretisation

public Discretisation(ThermoOpticalProperties properties)

Constructs a DiscreteIntensities with the default OrdinateSet and a new uniform grid.

Parameters:

properties -

Method Detail

incidentRadation

public double incidentRadation(int j)

Calculates the incident radiation $\sum$_iw_i I_ij, which is the zeroth moment of the intensities. The calculation uses the symmetry of the quadrature weights for positive and negativ nodes.

Parameters:

j - spatial index

Returns:

the incident radiation at j

incidentRadiation

public double incidentRadiation(int j,
                                int startInclusive,
                                int endExclusive)

Calculates the incident radiation $\sum$_iw_i I_ij, by performing simple summation for node points between startInclusive and endExclusive.

Parameters:

j - spatial index

startInclusive - lower bound for summation

endExclusive - upper bound (exclusive) for summation

Returns:

the partial incident radiation at j

See Also:

LinearAnisotropicPF

firstMoment

public double firstMoment(double[][] ext,
                          int j)

Calculates the first moment $\sum$_iw_iμ_iext_ij, which can be applied e.g. for flux or flux derivative calculation. The calculation uses the symmetry of the quadrature weights for positive and negativ nodes.

Parameters:

j - spatial index

Returns:

the first moment at j

flux

public double flux(int j)

Calculates the net flux at j.

Parameters:

j - the spatial coordinate

Returns:

the flux

See Also:

firstMoment(double[][],int)

flux

public double flux(int j,
                   int startInclusive,
                   int endExclusive)

Calculates the partial flux by performing a simple summation bounded by the arguments.

Parameters:

j - the spatial index

startInclusive - node index lower bound

endExclusive - node index upper bound (exclusive)

Returns:

the partial flux

fluxLeft

public double fluxLeft(BlackbodySpectrum emissionFunction)

Calculates the flux at the left boundary using an alternative formula.

Parameters:

emissionFunction - the emission function

Returns:

the net flux at the left boundary

fluxRight

public double fluxRight(BlackbodySpectrum emissionFunction)

Calculates the flux at the right boundary using an alternative formula.

Parameters:

emissionFunction - the emission function

Returns:

the net flux at the right boundary

intensitiesLeftBoundary

public void intensitiesLeftBoundary(BlackbodySpectrum ef)

Calculates the reflected intensity (positive angles, first half of indices) at the left boundary (τ = 0).

Parameters:

ef - the emission function

intensitiesRightBoundary

public void intensitiesRightBoundary(BlackbodySpectrum ef)

Calculates the reflected intensity (negative angles, second half of indices) at the right boundary (τ = τ₀).

Parameters:

ef - the emission function

setEmissivity

protected final void setEmissivity(double emissivity)

getOrdinates

public OrdinateSet getOrdinates()

setOrdinateSet

public void setOrdinateSet(OrdinateSet set)

set

public void set(NumericPropertyKeyword type,
                NumericProperty property)

Description copied from class: Accessible

An abstract method, which must be overriden to gain access over setting the values of all relevant (selected by the programmer) NumericProperties in subclasses of Accessible. Typically this involves a switch statement that goes through the different options for the type and invokes different set(...) methods to update the matching NumericProperty with property.

Specified by:

set in class Accessible

Parameters:

type - the type, which must be equal by definition to property.getType().

property - the property, which contains new information.

listedTypes

public List<Property> listedTypes()

Description copied from class: PropertyHolder

By default, collects a list of default properties corresponding to types defined by listedKeywords(). However, this method is overridable to include non-numeric properties.

Overrides:

listedTypes in class PropertyHolder

Returns:

a list of Property instances, which have been explicitly marked as a listed parameter for this PropertyHolder.

getDescriptor

public String getDescriptor()

Description copied from class: PropertyHolder

If not null, will return the prefix, otherwise calls the superclass method.

Overrides:

getDescriptor in class PropertyHolder

Returns:

the descriptor

See Also:

Group.getSimpleName()

toString

public String toString()

Overrides:

toString in class Object

getGrid

public StretchedGrid getGrid()

setGrid

public final void setGrid(StretchedGrid grid)

getQuantities

public DiscreteQuantities getQuantities()

getQuadratureSelector

public DiscreteSelector<OrdinateSet> getQuadratureSelector()