Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4438844 | Atmospheric Environment | 2012 | 8 Pages |
Numerical calculations are performed to reproduce the transport and dispersion of the continuous release of dense gases over flat homogeneous surfaces with and without the mitigating influence of a downwind water curtain. Frequently such plumes are released as a result of a chemical manufacturing, storage or gas transportation accident resulting in a ground-level hazard due to gas flammability or toxicity. A field situation in which cold carbon dioxide was released upwind of water curtains (Moodie et al., 1981) was simulated using the open-source software FDS (Fire Dynamic Simulator) a full 3-d CFD model. Only water-spray enhancement of dispersion was considered; hence, no chemical removal or reactions were present or simulated. Wind-tunnel measurements for a 1:28.9 scale replication of the Moodie experiments are also compared with the 3-d CFD results. Concentration distributions, percent dilution and forced diffusion parameters were compared in scatter diagrams. Concentration field contours with and without active spray curtains are also presented.
► Model replicated dense gas dispersing with water-spray curtain mitigation devices. ► Cold carbon dioxide released upwind of water curtains was simulated using CFD. ► Wind-tunnel measurements were compared with the 3-d CFD results. ► Concentration, percent dilution and forced dilution were compared in diagrams.