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Leaf-scale flames play a pivotal role in fire spread within the same crown fuel and from one shrub or tree to another. In the present work, pyrolysis and combustion of a solid fuel element representing a manzanita leaf were computationally investigated in a configuration where the fuel was subject to an upward stream of hot gases. The configuration...
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... the current simulation setup. Therefore, because of the upward direction of the gas flow from the FFB, a significant portion of the heat released due to the combustion of secondary pyrolysis products cannot be transferred to the leaf. Consequently, the solid fuel pyrolysis process is not considerably influenced by tar cracking. It is evident from Fig. 3 that all HRR curves start to gain appreciable amounts at around t = 3 s. This initial similarity is correlated with the initial similarity in the pyrolysis (mass loss) rates as indicated by Fig. 2 between all cases. Despite the differences in the composition-reaction models, similar amounts of pyrolysis gas initially released from the ...
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