Fire Safety Science Digital Archive

The mechanism and process of the flame growth and developnent over oil-sand pool was studied numerically in detail. Considering the influence of the oil and sand, the oil-sand pool must he included in the simulating domain, which modeled by the porous medium approach. Heat release is described by a single-step, irreversible, global reaction for complete combustion. At the interface, the Stefan Flow was considered. Based on the numerical aspect and the calculated flame spread rate and the temperature distributions in glass bead layer, it is pointed out that under the flash point temperature, the behavior of the flame spread is affected by the two-phase heat transfer through the mixed media of glass beads and kerosene as well as glass beads and gas. The dominant mode of heat transfer to kerosene ahead of the leading flame edge is inferred to he the conduction through the liquid-solid phase.