Lagrangian stochastic model for buoyant gas dispersion in a simple geometric chamber

Byung Gu Kim, Jong Soo Kim, Changhoon Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A new Lagrangian stochastic model is proposed to predict dispersion of buoyant gases, such as hydrogen, by including the buoyant forcing term in the stochastic model and by considering the wall-plume interaction based on the hydrostatic approximation. The proposed model was validated by carrying out simulations for three accidental hydrogen release scenarios. The simulation for the case of instantaneous release exhibits a realistic spreading of the hydrogen puff in the vicinity of the horizontal ceiling, caused by the hydrostatic pressure. The predicted variation of concentration for the cases of continuous release shows good agreement with other simulation and experimental results.

Original languageEnglish
Pages (from-to)995-1002
Number of pages8
JournalJournal of Loss Prevention in the Process Industries
Issue number6
Publication statusPublished - 2009 Nov

Bibliographical note

Funding Information:
The authors would like to acknowledge the financial support by National R&D Organization for Hydrogen & Fuel Cell and by the Korean Ministry of Commerce, Industry and Energy.

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Food Science
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Management Science and Operations Research
  • Industrial and Manufacturing Engineering


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