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Validation of CFD Multiple Pool Fires Model with Experimental Study of Multiple Pool Fires

Beygmohammadi, Farzaneh | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51034 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Rashtchian, Davoud
  7. Abstract:
  8. Fire is the most likely type of process accident which occurs in industrial plants. Among all different types of fire, pool fire is the most frequent one, so there are extensive researches done about pool fire. One of the research areas that has drawn a lot of attention in recent years, is pool fire modeling. Results obtained from fire modeling are quite applicable in different fields of safety engineering such as Quantitative Risk Assessment (QRA) or fire proofing studies of process equipment. But fire modeling is an inherently complex process. Because there are several aspects involved such as multi-phase flow, turbulent mixing, combustion and different mechanisms of heat transfer. This complexity increases when simultaneous pool fires take place and that is why there is not any comprehensive research dealing this phenomenon available in the literature. On the other hand, there are a considerable number of past accidents, in which more than one single pool fire has occurred. So it seems necessary for some plants to include simultaneous pool fire scenarios in risk analysis. In this project, a well-known Computational Fluid Dynamics software, so-called Fire Dynamics Simulator (FDS), has been used to simulate simultaneous pool fire scenarios. Influences and reciprocal impactsin terms of dynamics and growth of pool fires have been investigated. Heat release rates, temperature and flame shapes have been monitored as the main outputs of the simulations. Based on the simulation results, it can be concluded that the amounts of mass burning rate, the flame temperature and the pool fire flame height were significantly higher in multiple pool fires, when compared and validate with multiple pool fires experiments. Furthermore, the effects of different grid sizes on the accuracy of the pool fire simulations have also been investigated and are discussed
  9. Keywords:
  10. Modeling ; Multiple Pool Fire ; Fire Dynamic Simulator (FDS)Software ; Simulation ; Computational Fluid Dynamics (CFD)

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