Large eddy simulations of smoke movement

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 methanol 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 temperature.

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“…The details of the model have been described previously [1,2] and will not be repeated here. A full description can be found in Ref.…”

Section: Hydrodynamic Modelmentioning

confidence: 99%

Numerical Modeling Of Pool Fires Using Les And Finite Volume Method For Radiation

Hostikka¹,

McGrattan²,

Hamins³

2003

Fire Saf. Sci.

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“…After the window was opened the uncertainty was minimized due to the majority of the burning occurring outside of the room. In large-scale fire tests reported in [24], FDS temperature predictions were found to be within 15% of the measured temperatures and the FDS heat release rates were predicted to within 20% of the measured values. Therefore the results are presented as ranges to address these uncertainties.…”

Section: Methodsmentioning

confidence: 56%

Evaluation of the ability of fire dynamic simulator to simulate positive pressure ventilation in the laboratory and practical scenarios

Kerber¹

2006

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Positive Pressure Ventilation (PPV) is a tactic that is used on fire grounds across the world everyday, both to improve tenability after the extinguishment of a fire and/or offensively during fire attack to improve firefighting conditions. PPV has proven that it can be a useful tool on the fire ground, but it can also kill or injure fire fighters and All experiments qualify and quantify the comparison of the experimental results with the FDS results. A concluding scenario is modeled utilizing the calibration of the full-scale experiments to examine the effects of PPV on a fire in a two-story, colonial style house.

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“…McGrattan [30] suggested 10 % of plume characteristic length as adequate resolution after careful comparisons with plume correlations. Based on these suggestions, a grid sensitivity analysis was conducted to determine the appropriate grid spacing [26], see Appendix B.…”

Section: Grid Resolutionmentioning

confidence: 99%