Rayleigh-Taylor instability: Modelling and effect on coherent deflagrations

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The modelling of Rayleigh-Taylor instability during premixed combustion scenarios is presented. Experimental data obtained from experiments undertaken by FM Global using their large-scale vented deflagration chamber was used to develop the modelling approach. Rayleigh-Taylor instability is introduced as an additional time-dependent, combustion enhancing, mechanism. It is demonstrated that prior to the addition of this mechanism the LES deflagration model under-predicted the experimental pressure transients. It is confirmed that the instability plays a significant role throughout the coherent deflagration process. The addition of the mechanism led to the model more closely replicating the pressure peak associated with the external deflagration.
Original languageEnglish
Pages (from-to)20467-20473
JournalInternational Journal of Hydrogen Energy
Issue number35
Publication statusPublished (in print/issue) - 3 Dec 2014


  • Deflagration
  • Modelling
  • Rayleigh-Taylor instability
  • Venting


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