The dispersion of fugitive emissions from storage tanks

Hort, Matthew C.; Robbins, A.G.

doi:10.1016/s0167-6105(02)00252-0

Cited by 12 publications

(7 citation statements)

References 14 publications

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“…Shirakata et al (2002) used various vorticity generators and roughness elements to generate turbulence and stratification profiles that reproduced diffusion behaviour observed in the field for the Pasquill-Meade stability classes (Pasquill 1961;Meade 1959). Hort and Robins (2002) studied diffusion from the top of cylindrical tanks over a rough surface under neutral and stable stratification conditions. Similarly, Yassin (2013) simulated diffusion from a stack on an isolated building immersed in a boundary layer over a rough surface under neutral, stable, and unstable stratification conditions.…”

Section: Introductionmentioning

confidence: 99%

Passive scalar diffusion in and above urban-like roughness under weakly stable and unstable thermal stratification conditions

Kanda

Yamao

2016

Journal of Wind Engineering and Industrial Aerodynamics

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Wind-tunnel experiments were conducted to investigate passive scalar diffusion behaviour in and above urban-like roughness under various thermal stratification conditions. Staggered arrays of rectangular blocks with aspect ratios of 0.96 or 1.92 were used to model the urban canopies. Weakly stable and unstable thermal stratification conditions were created by controlling the temperature of the windtunnel floor and the airflow. Above the modelled urban roughness, vertical profiles of the velocity and temperature were measured by a laser Doppler anemometer and a cold-wire thermometer, respectively. The estimated Obukhov length was found comparable or larger than the boundary-layer thickness, indicating very weak stratification. Passive-scalar diffusion was studied by emitting ethane gas from a point source on the wind-tunnel floor. Thermal stratification had substantial effect on diffusion even in the vicinity of the source where mechanical mixing by the model blocks was presumed to eliminate the stratification effect.

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Section: Introductionmentioning

confidence: 99%

Passive scalar diffusion in and above urban-like roughness under weakly stable and unstable thermal stratification conditions

Kanda

Yamao

2016

Journal of Wind Engineering and Industrial Aerodynamics

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“…None of this proves to be routine and surprises still abound. The discovery that a relatively low bund wall around a large storage tank can completely change the flow field in the near-wake, almost eliminate mean streamline deflections over the tank and, consequently, also greatly reduce near field ground level concentrations was most unexpected [18]. Surprises like this lead to re-evaluation of what it is that models like ADMS and AERMOD actually provide for their users and what they should be designed to provide.…”

Section: Buildingsmentioning

confidence: 99%

Wind tunnel dispersion modelling some recent and not so recent achievements

Robins

2003

Journal of Wind Engineering and Industrial Aerodynamics

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“…Lin et al (2021) numerically studied dispersion characteristics of natural gas in cofferdam area, and the impacts of wind directions, cofferdam height and leak locations were carefully considered in computational cases. Hort and Robbins (2002) presented a series of experimental results of dense gas diffusion around single storage tank or a small-scale tank group under neutral or stable atmospheric stability. Ohba et al (2004) validated the accuracy of wind tunnel experiment and numerical methods in predicting dispersion of LNG leaking from storage tank.…”

Section: Introductionmentioning

confidence: 99%

Study on the potential risks under a hazardous gas leakage accident: effects of source characteristics and ambient wind velocities

Zhang²,

Wu³

et al. 2022

Environ Sci Pollut Res

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In this study, a full scale storage tank was established to investigate the potential risks of leakage accident. We have developed a series of leak scenarios that close to real accidents, and have divided the ambient areas according to relevant regulations. Considering the variety and complexity of real-life accident scenarios, the presented work revealed the combined effect of source release intensity and ambient wind speed on dispersion features by classifying leakage scenarios into active or passive release. The Environmental hazards in each area is evaluated under various leak scenarios. The results show that when the approaching wind speed is low, the leakage on the windward side is the most dangerous release pattern. With the increase of the wind speed, the case with jet angle perpendicular to the incoming wind produces the largest cloud volume. Top release is the least dangerous way among the studied leak scenarios. However, the results illustrate that under some release angles, the cloud volume near the tank is not sensitive to wind speed. In leak accidents, quantitatively analysis reveals that the commonly used dimensionless concentrations (K c ) cannot be used as a suitable parameter to discuss the concentration eld except under top/leeward passive release conditions. This study will be bene cial to on-site rescue and decision-making when leakage accidents occur, and provide reasonable suggestions for subsequent research on the environmental impact of container leakage and the diffusion of pollutants.

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The dispersion of fugitive emissions from storage tanks

Cited by 12 publications

References 14 publications

Passive scalar diffusion in and above urban-like roughness under weakly stable and unstable thermal stratification conditions

Passive scalar diffusion in and above urban-like roughness under weakly stable and unstable thermal stratification conditions

Wind tunnel dispersion modelling some recent and not so recent achievements

Study on the potential risks under a hazardous gas leakage accident: effects of source characteristics and ambient wind velocities

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