Estimating the Flammable Mass of a Vapor Cloud

Woodward, John L.

doi:10.1002/9780470935361

Cited by 25 publications

(34 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This assumption is in close agreement with what is reported in the literature (TNO, 2005;Woodward, 1999). For this plume source height, the particle diameters that would reach ground level at the corresponding downwind distance can be calculated by above gravitational settling models.…”

Section: Daytime Insolationsupporting

confidence: 60%

Setting threshold values of particle sizes for determination of the appropriate dispersion/deposition model during various atmospheric stability conditions

Mandel

Stern

Ullmann

et al. 2015

Atmospheric Environment

View full text Add to dashboard Cite

Section: Daytime Insolationsupporting

confidence: 60%

Setting threshold values of particle sizes for determination of the appropriate dispersion/deposition model during various atmospheric stability conditions

Mandel

Stern

Ullmann

et al. 2015

Atmospheric Environment

View full text Add to dashboard Cite

“…(4) (Woodward, 2010): where z is the height, g is the gravitational acceleration, T is the ambient temperature at the reference height obtained from Raman lidar measurements, and u is the vertical wind speed at the reference height obtained from Doppler lidar measurements. Based on the Richardson number, the stability of the boundary layer can be classified into six Pasquill stability regimes: A -extremely unstable; B -moderately unstable; C -slightly unstable; D -neutral; E -slightly stable; and F -moderately stable.…”

Section: Estimates Of Hygroscopicity Parameter Water Content Of Nanomentioning

confidence: 99%

Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site

et al. 2018

View full text Add to dashboard Cite

Abstract. Most prior field studies of new particle formation (NPF) have been performed at or near ground level, leaving many unanswered questions regarding the vertical extent of NPF. To address this, we measured concentrations of 11-16 nm diameter particles from ground level to 1000 m during the 2013 New Particle Formation Study at the Atmospheric Radiation Measurement Southern Great Plains site in Lamont, Oklahoma. The measurements were performed using a tethered balloon carrying two condensation particle counters that were configured for two different particle cut-off diameters. These observations were compared to data from three scanning mobility particle sizers at the ground level. We observed that 11-16 nm diameter particles were generated at the top region of the boundary layer, and were then rapidly mixed throughout the boundary layer. We also estimate liquid water content of nanoparticles using ground-based measurements of particle hygroscopicity obtained with a Humidified Tandem Differential Mobility Analyzer and vertically resolved relative humidity (RH) and temperature measured with a Raman lidar. Our analyses of these observations lead to the following conclusions regarding nanoparticles formed during NPF events at this site: (1) ground-based observations may not always accurately represent the timing, distribution, and meteorological conditions associated with the onset of NPF; (2) nanoparticles are highly hygroscopic and typically contain up to 50 % water by volume, and during conditions of high RH combined with high particle hygroscopicity, particles can be up to 95 % water by volume; (3) increased liquid water content of nanoparticles at high RH greatly enhances the partitioning of water-soluble species like organic acids into ambient nanoparticles.

show abstract

“…On the other hand, stable class F tends to conquer turbulence and updraft movements which results in impeded dispersion of chemicals comparing to unstable atmospheres (Table 3). Since the measurement of stability is difficult, Pasquill (1961) proposed a scheme in order to estimate the stability classes taking into consideration the solar radiation (during day), cloudiness (at night) and wind speed (Woodward, 2010). Since in this study wind speed was considered to be constant from the moment that the accident occurs through complete dilution of the chemical, the only parameter which could alter the stability class was solar radiation or cloudiness.…”

Section: Case Study For Explosion During Ammonia Transportmentioning

confidence: 99%

Explosion impacts during transport of hazardous cargo: GIS-based characterization of overpressure impacts and delineation of flammable zones for ammonia

Inanloo

Tansel

2015

Journal of Environmental Management

View full text Add to dashboard Cite

Estimating the Flammable Mass of a Vapor Cloud

Cited by 25 publications

References 0 publications

Setting threshold values of particle sizes for determination of the appropriate dispersion/deposition model during various atmospheric stability conditions

Setting threshold values of particle sizes for determination of the appropriate dispersion/deposition model during various atmospheric stability conditions

Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site

Explosion impacts during transport of hazardous cargo: GIS-based characterization of overpressure impacts and delineation of flammable zones for ammonia

Contact Info

Product

Resources

About