com.mockturtlesolutions.snifflib.pde

Class CrankNicholson

java.lang.Object

com.mockturtlesolutions.snifflib.pde.AbstractDiffuse

com.mockturtlesolutions.snifflib.pde.CrankNicholson

All Implemented Interfaces:

Reportable, NamedParameters, Diffusion, PartialDifferentialEquation

public class CrankNicholson
extends AbstractDiffuse

Sparse matrix implementation of Crank-Nicholson parabolic equation solver.

Field Summary

Fields

Modifier and Type	Field and Description
static int	AMATRIX
static int	BMATRIX

Fields inherited from class com.mockturtlesolutions.snifflib.pde.AbstractDiffuse

boundaryCondition, D, dt, ghostpts, grid, initialCondition, Params, reporter, time, tstop, u

Constructor Summary

Constructors

Constructor and Description
CrankNicholson()
CrankNicholson(NDGrid g)
CrankNicholson(NDGrid g, BoundaryCondition BC)

Method Summary

Methods

Modifier and Type	Method and Description
void	generateMatrix(int type)
SblMatrix	getAMatrix() Returns the sparse matrix representation of the "backward" or implicit matrix A of the Crank-Nicholson scheme A*u(t+1) = B*u(t)
SblMatrix	getBMatrix() Returns the sparse matrix representation of the "forward" matrix B of the Crank-Nicholson scheme A*u(t+1) = B*u(t)
DblMatrix	getRHSA()
DblMatrix	getRHSB()
void	solve()
void	updateGrid(NDGrid grid)

Methods inherited from class com.mockturtlesolutions.snifflib.pde.AbstractDiffuse

getBoundaryCondition, getDiffusionCoefficient, getDimension, getInitialCondition, getParam, getReporter, getSolution, getTime, hasParameter, parameterSet, replaceParams, setBoundaryCondition, setDiffusionCoefficient, setInitialCondition, setParam, setReporter, setTime

Methods inherited from class java.lang.Object

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

Field Detail

BMATRIX

public static final int BMATRIX

See Also:

Constant Field Values

AMATRIX

public static final int AMATRIX

See Also:

Constant Field Values

Constructor Detail

CrankNicholson

public CrankNicholson()

CrankNicholson

public CrankNicholson(NDGrid g)

CrankNicholson

public CrankNicholson(NDGrid g,
              BoundaryCondition BC)

Method Detail

updateGrid

public void updateGrid(NDGrid grid)

getAMatrix

public SblMatrix getAMatrix()

Returns the sparse matrix representation of the "backward" or implicit matrix A of the Crank-Nicholson scheme A*u(t+1) = B*u(t)

getBMatrix

public SblMatrix getBMatrix()

Returns the sparse matrix representation of the "forward" matrix B of the Crank-Nicholson scheme A*u(t+1) = B*u(t)

getRHSA

public DblMatrix getRHSA()

getRHSB

public DblMatrix getRHSB()

generateMatrix

public void generateMatrix(int type)

solve

public void solve()

Specified by:

solve in interface PartialDifferentialEquation

Specified by:

solve in class AbstractDiffuse