Class FFTSolution

java.lang.Object
  Solution
      FluidSolution
          FFTSolution

public class FFTSolution

extends FluidSolution

FFTsolution - Fast Fourier Transform solver

See Also:

FluidSolution, Solution

Field Summary

protected boolean	isForward True if needs to shiftLevels
protected FFT	keepFFT FFT previous (or initial) step
protected FFT	toolFFT FFT tool

Fields inherited from class Solution

df, dfm, dfp, dg, dgm, dgp, dh, dhm, dhp, dx, f, f0, fm, fp, g, gm, gp, h, hm, hp, ic, initialMoments, mesh, method, pde, s, scheme, sm, sp, time, x, x_0, x_1, xOffset, xSize, y_0, y_1, yOffset, ySize

Constructor Summary

FFTSolution(RunData runData)

Method Summary

void	discretize(ShapeFunction function) Discretize the initial Shape function and initialize the moments
boolean	hasOption(java.lang.String option) Tells whether the solution implements a option
boolean	next(RunData runData, PhysData physData) Advance the solution forward one step in time.
boolean	previous(RunData runData, PhysData physData) Starting procedure for FFT schemes.
protected void	shiftLevels() Internal function for copying new -> old

Methods inherited from class Solution

calculateMoments, getTime, getValue, getValue, getWinSize, incTime, limits, measure, momentsDeviation, output, plot, rescale, setIC, setMethod, setPde, setScheme, setTime, updateHeaders

Methods inherited from class java.lang.Object

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

Field Detail

keepFFT

protected FFT keepFFT

FFT previous (or initial) step

toolFFT

protected FFT toolFFT

FFT tool

isForward

protected boolean isForward

True if needs to shiftLevels

Constructor Detail

FFTSolution

public FFTSolution(RunData runData)

Method Detail

discretize

public void discretize(ShapeFunction function)

Discretize the initial Shape function and initialize the moments

Overrides:

discretize in class FluidSolution

Parameters:

function - The initial shape to be approximated

next

public boolean next(RunData runData,
                    PhysData physData)

Advance the solution forward one step in time. The equation is set by the internal variable pde and the numerical scheme by the internal variable scheme

Specified by:

next in class Solution

Parameters:

runData - List of run parameters

physData - Physical parameters (e.g. potential)

Returns:

True if a scheme is implemented for that equation

See Also:

RunData

previous

public boolean previous(RunData runData,
                        PhysData physData)

Starting procedure for FFT schemes.

Specified by:

previous in class Solution

Parameters:

runData - List of run parameters

Returns:

True if an initialisation scheme is implemented for that equation

See Also:

RunData

hasOption

public boolean hasOption(java.lang.String option)

Tells whether the solution implements a option

Specified by:

hasOption in class Solution

Parameters:

option - The the option to implement

Returns:

True if the option is implemented

See Also:

jbone.pdeNames, jbone.schemeNames

shiftLevels

protected void shiftLevels()

Internal function for copying new -> old