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Theses

CFD simulation of deflagrations in open congested environment for industrial accident application

Abstract : During regulatory hazard studies, governmental or private organizations are called upon for their expertise in predicting the consequences of accidental scenarios. During these hazard studies, effect distances must be determined. Several methods and tools are used to determine these effect distances. First based on phenomenological methods, a more complex numerical modeling has become more affordable and applicable to real industrial situations. Computational fluid mechanics is one of these methods. One of the most devastating accident scenarios is the unconfined vapour cloud explosion (UVCE). Following a loss of containment of a flammable fluid on an industrial site (gasoline, natural gas, hydrogen, etc.), a gas plume can form and mix with the surrounding air to form a flammable mixture. This flammable mixture can potentially spread over a large area. Upon contact with an energy source within the area where the cloud has spread, a combustion reaction can be initiated and propagate throughout the cloud until all fuel has been consumed. The propagation of this turbulent flame front will generate overpressure in the near and far field that can cause heavy human and material damage. This thesis proposes a study of the simulation of UVCE by computational fluid dynamics methods. The main objectives are to improve the skills of organizations like INERIS in this field, and to increase the confidence in predictions produced by such methods.
Keywords : Deflagration UVCE CFD
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Submitted on : Monday, May 23, 2022 - 2:02:12 PM
Last modification on : Tuesday, May 24, 2022 - 3:49:17 AM

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  • HAL Id : tel-03675828, version 1

Citation

Cléante Langrée. CFD simulation of deflagrations in open congested environment for industrial accident application. Fluid mechanics [physics.class-ph]. Normandie Université, 2021. English. ⟨NNT : 2021NORMR085⟩. ⟨tel-03675828⟩

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