import GaussianDecayPuff from 'dirtybomb/src/Dispersion/GaussianDecayPuff.js'

public class | source

GaussianDecayPuff

Extends:

GaussianPlume → GaussianPuff → GaussianDecayPuff

Adds decay to the Simple Gaussian Puff

Constructor Summary

Public Constructor
public	constructor(atmosphere: Atmosphere, source: Source, massReleased: number, halfLife: number)

Method Summary

Public Methods
public	getConcentration(x: number, y: number, z: number, t: number): * Takes into account the decay term, as seen in URAaTM pg 281
public	getDecayTerm(x: number, windSpeed: number): number Read URAaTM pg 281 - 285
public	getHalfLife(): number

Inherited Summary

From class GaussianPlume
public	addSource(source: Source): GaussianPlume Adds a single source to the plume
public	getAtmosphere(): Atmosphere \| *: Atmosphere
public	getConcentration(x: number, y: number, z: number): number Calculates the concentration at a given x,y,z coordinate.
public	getEffectiveSourceHeight(): number Takes into account the wind and other factors into account.
public	getMaxConcentration(): number Calculates the maximum concentration dispersed
public	getMaxConcentrationX(): number Calculates the distance downwind of the maximum concentration
public	getMaxRise(x: number): number The max rise of the plume at x meters downwind
public	getMeanHeight(x: *): number
public	getSource(): Source \| *
public	getStatsForCoords(coords: Coord[]): Stat[] Same as getStatsForXs, but for 3d coordinates
public	getStatsForXs(xs: number[]): Stat[] Calculates the stdY, stdZ, and concentrations for a list of x coordinates directly downwind of the _source Useful in creating graphs / processing large amounts of data at once
public	getStdY(x: number): number Brookhaven sigma The crosswind distance standard deviation for a distance x downwind.
public	getStdZ(x: number): number Brookhaven sigma The vertical distance standard deviation for a distance x downwind.
public	getWindSpeedAtSourceHeight(): number
public	setAtmosphere(atmosphere: Atmosphere): GaussianPlume: Atmosphere
public	setEffectiveSourceHeight(height: number): GaussianPlume Manually set the Effective Source Height
public	toString(): string
protected	_getStdYCoeffs(x: number): STD_Y_COEFF A helper function for the StdZ calculation
protected	_getStdZCoeffs(x: number): STD_Z_COEFF A helper function for the StdZ calculation

From class GaussianPuff
public	getCenterX(t: number): number The center at x meters downstream after t seconds
public	getConcentration(x: number, y: number, z: number, t: number): number
public	getMassReleased(): number

Public Constructors

public constructor(atmosphere: Atmosphere, source: Source, massReleased: number, halfLife: number) source

Override:

GaussianPuff#constructor

Params:

Name	Type	Attribute	Description
atmosphere	Atmosphere
source	Source
massReleased	number
halfLife	number		seconds

Public Methods

public getConcentration(x: number, y: number, z: number, t: number): * source

Takes into account the decay term, as seen in URAaTM pg 281

Override:

GaussianPuff#getConcentration

Params:

Name	Type	Attribute	Description
x	number		downwind (m)
y	number		crosswind (m)
z	number		height (m)
t	number		seconds from start

Return:

See:

https://books.google.com/books?id=bCjRtBX0MYkC&pg=PA280&lpg=PA280&dq=gaussian+decay+plume&source=bl&ots=oJbqk8OmIe&sig=GqzwcwVfbk_XUR6RztjSeVI0J20&hl=en&sa=X&ved=0ahUKEwih4OS7zpTNAhWq5oMKHeM_DyIQ6AEINjAF#v=onepage&q=gaussian%20decay%20plume&f=false

public getDecayTerm(x: number, windSpeed: number): number source

Read URAaTM pg 281 - 285

Params:

Name	Type	Attribute	Description
x	number		downwind distance (m)
windSpeed	number		at source height (m/s)

Return:

number

Decay term

See:

https://books.google.com/books?id=bCjRtBX0MYkC&pg=PA280&lpg=PA280&dq=gaussian+decay+plume&source=bl&ots=oJbqk8OmIe&sig=GqzwcwVfbk_XUR6RztjSeVI0J20&hl=en&sa=X&ved=0ahUKEwih4OS7zpTNAhWq5oMKHeM_DyIQ6AEINjAF#v=onepage&q=gaussian%20decay%20plume&f=false

public getHalfLife(): number source

Return:

number