- Conference date: 17-19 October 2006
- Location: Madrid (Spain)
Flame spreading over liquid fuels exhibits, depending on the initial fuel surface temperature (T ∞), five different spreading regimes, separated by four critical temperatures T 1, T 2, T 3 T 4, being T 1 a stationnary bifurcation, T 2 a trasncritical bifurcation, T 3 a Hopf bifurcation and T 4 a homoclinic connection. For T 4 ⩽ T ∞ ⩽ T 3 flame spreading velocity (ν f ) oscillates with a given period that diverges for T ∞ = T 4. The appearance of all these regimes is due to the existence of a preheating zone ahead of the flame front that modifies its spreading, and it corresponds to an avalanche‐collapse process, that has been shown to possess universal characteristics. The mechanisms involved are described here and compared with the experimental results obtained in our laboratory.
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