Numerical Simulation of Mixing Process of Gaseous Suppressant

Nobuyoshi Kawabata, Takuji Ishikawa, Yusuke Naito, Youichiro Matsumoto, Naoshi Saito, Takashi Tsuruda

Research output: Contribution to journalArticlepeer-review


It is important for a fire suppression system to keep the target concentration in all regions of a protected room. In this study, the effects of aspect ratio of the protected region, position and area of the pressure relief port, area of an obstacle in the protected region and the number of nozzles on the mixing process of gaseous suppressant are investigated by large eddy simulation, Besides, the evaluation method of the mixing condition is discussed. The results show that the gaseous suppressant is insufficiently mixed when the aspect ratio of the protected region is large and that the mixing condition can be evaluated by the ratio of the target concentration attainment.

Original languageEnglish
Pages (from-to)2569-2576
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number688
Publication statusPublished - 2003 Dec


  • Computational Fluid Dynamics
  • Diffusion
  • Gaseous Suppression System
  • Large Eddy Simulation
  • Mixing process
  • Turbulent Flow


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