DOI: 10.1016/j.atmosenv.2015.06.038
Scopus记录号: 2-s2.0-84937109715
论文题名: CFD model for large hazardous dense cloud spread predictions, with particular reference to Bhopal disaster
作者: Mishra K ; B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 117 起始页码: 74
结束页码: 91
语种: 英语
英文关键词: Bhopal disaster
; CFD model
; Dense cloud
; Porous medium
; Safety distance
Scopus关键词: Atmospheric boundary layer
; Atmospheric movements
; Boundary layers
; Disasters
; Fluid dynamics
; Forecasting
; Hazards
; Porous materials
; CFD (computational fluid dynamics)
; CFD modeling
; Different densities
; Gravity conditions
; Grid-independent
; Porous medium
; Safety distances
; Worst case scenario
; Computational fluid dynamics
; boundary layer
; computational fluid dynamics
; concentration (composition)
; data set
; disaster management
; hazard assessment
; numerical model
; organic compound
; pollution exposure
; porous medium
; prediction
; terrain
; toxicity
; trajectory
; wind velocity
; Article
; atmospheric dispersion
; Bhopal disaster
; cloud
; computational fluid dynamics
; controlled study
; density
; dispersion
; gravity
; plume
; prediction
; priority journal
; surface property
; velocity
; wind
; Bhopal
; India
; Madhya Pradesh
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: A volumetric source based CFD (Computational Fluid Dynamics) model for estimating the wind and gravity driven spread of an elevated released dense hazardous cloud on a flat terrain without and with obstacles is demonstrated. The model considers the development of a worst-case scenario similar to that occurred at Bhopal. Fully developed clouds of a dense gas having different densities, under ABL (Atmospheric Boundary Layer) with calm ground wind conditions are first obtained. These clouds are then allowed to spread under ABL with different ground wind speeds and gravity conditions. The developed model is validated by performing the grid independent study, the fluid dynamical evidences, post-disaster facts, the downwind MIC (Methyl Isocynate) concentrations estimated by earlier models and experiments on dense plume trajectories. It is shown that in case of an active dispersion under calm wind conditions the lateral spread would prevail over the downwind spread. The presence of a dense medium behaves like a weak porous media and initiates turbulence at much smaller downwind distances than that normally would occur without the dense medium. The safety distances from toxic exposures of MIC are predicted by specifying an isosurface of a minimum concentration above the ground surface. Discrepancies in near-field predictions still exist. However, the far-field predictions agree well with data published before. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81577
Appears in Collections: 气候变化事实与影响
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作者单位: Department 2.2, Reactive Substances and Systems, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, Berlin, Germany; Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, India
Recommended Citation:
Mishra K,B. CFD model for large hazardous dense cloud spread predictions, with particular reference to Bhopal disaster[J]. Atmospheric Environment,2015-01-01,117