plume modeling Articles

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Gaussian plume modeling of contaminant transport

by Springer  (Nov. 18, 2005)

A technique for modeling contaminant transport based on Markov process theory is developed. Transport is quantified by summing the first two moments of independent random displacements and applying the central limit theorem (CLT) to obtain solute distributions of a Gaussian nature. For non-uniform flow fields the CLT is applied in a ...

A simple and practical model for reactive plumes

by Inderscience Publishers  (Jan. 26, 2004)

Pollutants emitted from industrial stacks can be transformed by chemical reactions. An interesting case is the NO to NO2 conversion due to reactions with the ambient ozone. A simple and practical model has been developed to calculate this conversion in the vicinity of the source. Spatial distributions of the reactive species concentrations in the ...

Characterising uncertainty in plume dispersion models

by Inderscience Publishers  (Sep. 1, 2005)

For management decisions related to effects of releases of toxic chemicals, it is useful to consider not only the expected or most likely impact of the release, but also the envelope of possible outcomes, the latter of which involves an assessment of the uncertainty in the modelling results. In this paper, we provide quantitative estimates of ...

Theory, Modeling, and Measurements of Gas Plumes

by D&P Instruments  (Jan. 1, 2003)

Abstract Spectroscopic measurements of infrared CO2 transitions in gas plumes are reported, and evaluated for their potential to yield a reliable remote sensing technique for determination of plume temperature. Measurements were made on two types of plumes: a sideways-directed plume from a vehicle exhaust, and a stack plume from a propane-burning ...

Comparison of the inherent data error in plume rise models

by Inderscience Publishers  (Jan. 26, 2004)

Differences between Gaussian model results and observations depend highly on the individual data errors of the parameters considered in the model. For example, errors in the estimated plume rise can be partly explained by the semi-empirical character of its estimation procedures. Nevertheless, inherent data errors keep being important. A ...

A fluctuating plume model for pollutants dispersion with chemical reactions

by Inderscience Publishers  (Oct. 13, 2012)

A fluctuating plume model for pollutant dispersion is developed. The model is able to include chemical reactions, accounting for segregation. The model is tested against measured data in wind tunnel experiment, where NO is emitted from a source in an environment of ozone. The results are presented in terms of the plume centre line dispersion and ...

The plume model MODIS: integration in the Hydro-Quebec shell

by Inderscience Publishers  (Sep. 17, 2009)

The comprehensive numerical model MODIS for the simulation of pollutant dispersion from a point source is integrated in the graphical shell of Hydro-Quebec. The shell has been developed by Hydro-Quebec to offer a valuable scheme for various applications of software products, which were originally conceived only for scientific purposes. MODIS, ...

Plume dispersion in the wake of a rectangular model building

by Inderscience Publishers  (Dec. 9, 2008)

A field experiment was specifically designed and conducted to investigate the width of the near-wake recirculation region of a wide and slender model building. Tracer gas was released from the centre of the leeward side of the building. The results suggested that the width of the wake ranged between 0.6 and 1.1 W in the case of the wind normal to ...

Using plume rise schemes to model highly buoyant plumes from large fires

by Inderscience Publishers  (Feb. 8, 2011)

The atmospheric dispersion model Numerical Atmospheric-dispersion Modelling Environment (NAME) is used to simulate the smoke plume from the explosion at the Buncefield oil depot. Simple modelling, in which the plume rise is included through an effective elevated source term, captures the transport and spread of the plume well. More complex ...

On formulating equations for plume spreads for near-surface releases

by Inderscience Publishers  (Oct. 16, 2014)

Recent concerns about effects of automobile emissions on the health of people living close to roads have motivated an examination of models to estimate dispersion in the surface boundary layer. This examination led to new formulations for horizontal and vertical plume spread described in Venkatram et al. (2013). Concentration estimates based on ...

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