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Numerical Modeling of Pool Fires Using LES and Finite Volume Method for Radiation.


pdf icon Numerical Modeling of Pool Fires Using LES and Finite Volume Method for Radiation. (726 K)
Hostikka, S.; McGrattan, K. B.; Hamins, A.

Fire Safety Science. Proceedings. Seventh (7th) International Symposium. International Association for Fire Safety Science (IAFSS). June 16-21, 2003, Worcester, MA, Intl. Assoc. for Fire Safety Science, Boston, MA, Evans, D. D., Editor(s), 383-394 pp, 2003.

Keywords:

fire research; compartment fires; pool fires; burning rate; combustion models; thermal radiation; equations; pyrolysis; liquid fuels; computational fluid dynamics

Abstract:

The thermal environment in small and moderate-scale pool flames is studied by Large Eddy Simulation and the Finite Volume Method for radiative transport. The spectral dependence of the local absorption coefficient is represented using a simple wide band model. The predicted radiative heat fluxes from methane/natural gas flames as well as methane pool burning rates and flame temperatures are compared with measurements. The model can qualitatively predict the pool size dependence of the burning rate, but the accuracy of the radiation predictions is strongly affected by even small errors in prediction of the gas phase temeprature.