jass.generators
Class OpenWebsterTube

java.lang.Object
  jass.engine.Out
      jass.engine.InOut
          jass.generators.OpenWebsterTube

All Implemented Interfaces:

Sink, Source

public class OpenWebsterTube
extends InOut

Author:

Kees van den Doel (kvdoel@cs.ubc.ca) Implement Webster equation with open ends (pressure=0) and external fluid force applied on left end. u,f on o grid, S (area) on both p on x grid, p=0 on boundaries O x o x o x o x O N grid points, N is odd. Let i= 0,...,N-1 S[i] p[i=0,2...,N-1], u[i=1,3,..,N-2], same for f[] Physical parameters: - pressure deviation PP = rho * p (rho = dmass dens. air) - velocity UU = u/c - force on fluid FF = (rho/c)*f CFL conditions give delta_x = h > c/2*srate.

Field Summary

protected double	c
protected double[]	d_pu
protected double	h
protected double	len
protected double	minLen
protected int	N
protected double[]	outBuf
protected int	overSamplingFactor
protected double[]	pu
protected double[]	S
protected double[]	Sold
protected float	srate Sampling rate in Hertz.

Fields inherited from class jass.engine.InOut

sourceContainer, sourcePassivity, srcBuffers

Fields inherited from class jass.engine.Out

buf, bufferSize, bufOld, lock

Constructor Summary

OpenWebsterTube(float srate, int bufferSize, TubeModel tm)
Create and initialize.

Method Summary

void	changeTubeModel()
protected void	computeBuffer() Compute the next buffer and store in member float[] buf.
void	reset()
void	setAllAreas(double[] a) Set all areas
void	setArea(int k, double a) Set an individual segment area

Methods inherited from class jass.engine.InOut

addSource, addSource, getBuffer, getSources, removeSource, resetTime

Methods inherited from class jass.engine.Out

clearBuffer, copyToOld, getBuffer, getBufferSize, getTime, peekAtBuffer, setBufferSize, setTime, setTimeAndNotify

Methods inherited from class java.lang.Object

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

Field Detail

srate

protected float srate

Sampling rate in Hertz.

minLen

protected double minLen

c

protected double c

len

protected double len

h

protected double h

overSamplingFactor

protected int overSamplingFactor

N

protected int N

S

protected double[] S

Sold

protected double[] Sold

pu

protected double[] pu

d_pu

protected double[] d_pu

outBuf

protected double[] outBuf

Constructor Detail

OpenWebsterTube

public OpenWebsterTube(float srate,
                       int bufferSize,
                       TubeModel tm)

Create and initialize.

Parameters:

srate - sampling rate in Hertz.

nTubeSection - maximum number of sections (must be even)

Method Detail

changeTubeModel

public void changeTubeModel()

reset

public void reset()

setArea

public void setArea(int k,
                    double a)

Set an individual segment area

Parameters:

k - index of segment (0,....N-1)

a - area to set

setAllAreas

public void setAllAreas(double[] a)

Set all areas

Parameters:

array - of r areas

computeBuffer

protected void computeBuffer()

Compute the next buffer and store in member float[] buf.

Specified by:

computeBuffer in class Out