plume modeling Articles

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High-Resolution Site Characterization with Multilevel Systems

by Solinst Canada Ltd.  (Feb. 3, 2015)

Within the last few years, the U.S. EPA added a new focus area on high-resolution site characterization (HRSC) to their Contaminated Site Clean-Up Information (CLU-IN) website. The U.S. EPA’s definition of HRSC is: “High-resolution site characterization (HRSC) strategies and techniques use scale-appropriate ...

Simulation of plume dispersion using different stack configurations and meteorological inputs

by Inderscience Publishers  (Dec. 1, 2014)

The application of CALMET/CALPUFF modelling system is well known, and several validation tests were performed until now; however, most of them were based on experiments with a large compilation of surface and aloft meteorological measurements, not always available. Also, the use of an operational large smokestack as tracer source is not so usual. ...

The use of probabilistic plume predictions for the consequence assessment of atmospheric releases of hazardous materials

by Inderscience Publishers  (Dec. 1, 2014)

Toxic load-based toxicity models have been increasingly applied to model the effects of atmospheric releases of hazardous materials. Although the majority of atmospheric transport and dispersion models predict only a ‘mean’ plume, real-world personnel are exposed to one of many possible individual realisations of a plume, and never to a ‘mean’ ...

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 ...

A Lagrangian stochastic model for estimating the high order statistics of a fluctuating plume in the neutral boundary layer

by Inderscience Publishers  (Oct. 16, 2014)

We use a Lagrangian stochastic micromixing model to predict the concentration fluctuations of a continuous release in a neutral boundary layer. We present the computational algorithm that implements the interaction by exchange with the conditional mean model and we compare the numerical solutions with the experimental values in order to evaluate ...

Support to Aviation Control Service (SACS): an online service for near-real-time satellite monitoring of volcanic plumes

by NILU - The Norwegian Institute for Air Research  (May 16, 2014)

Volcanic eruptions emit plumes of ash and gases into the atmosphere, potentially at very high altitudes. Ash-rich plumes are hazardous for airplanes as ash is very abrasive and easily melts inside their engines. With more than 50 active volcanoes per year and the ever-increasing number of commercial flights, the safety of airplanes is a real ...

Numerical simulation of aerosols in an aircraft wake using a 3D LES solver and a detailed microphysical model

by Inderscience Publishers  (Oct. 28, 2014)

The global impact of aviation on the atmosphere is generally determined using the total amount of gas and particulate matter emitted at the aircraft engine exit but generally ignore some of the physical transformations occurring at much smaller scales in the aircraft wake. In this work, we present an offline alternative method based on the use of ...

Comparison of hazard area and casualty predictions of a small-scale chemical attack using various toxic load toxicity models

by Inderscience Publishers  (Oct. 16, 2014)

It has been observed that the toxic load model can better account for toxic effects from chemical exposures than Haber’s law. However, the toxic load model has been experimentally validated only for steady exposures. We compare four proposed extensions of the toxic load model to the case of time-varying exposures. We conclude that the choice of ...

Analytical offline approach for concentration fluctuations and higher order concentration moments

by Inderscience Publishers  (Dec. 1, 2014)

We developed a fluctuating plume model able to evaluate all the higher order moments of concentration only requiring the knowledge of the first one. The simple algorithm used to calculate the meander centroid component is independent of the method used to obtain the mean concentration field and makes the computational time lower than most ...

Spolchemie site remediation and NanoRem field site application

by NANO IRON s.r.o.  (Jan. 26, 2015)

Site Remediation The Spolchemie site was chosen as one of the NanoRem case study sites, to test two types of nanoparticles (NPs) (zerovalent iron - nZVI and iron oxide NPs) for in situ remediation of BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) contamination. Nanoremediation was seen as an opportunity to enhance the in situ biodegradation of ...

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