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Communication Dans Un Congrès Année : 2009

Assessment of the plume theory predictions of crown scorch using transport models

Résumé

The aim of our work is to study numerically crown scorch as the effectsof a fire line spreading through surface fuel under a tree canopy. Theobjective was to assess the usual assumptions made when one uses the Van Wagner criteria, which are indeed simple predictive models for crown scorch height, to estimate crown scorch. For this purpose the FIRESTAR 2D and FIRETEC wildfire simulators are used. We simulated the fire line by a heat source at ground level and mainly investigated the temperature field. As a first step, we ran computations of thermal plumes with no-wind and with no canopy, for first comparison to plume theory. The influence of crown existence on the temperature field above the heat source, as well as on crown scorch, was then investigated. As a second step, the effect of a wind to the plume, as well as to crown scorch, was shown for the no-canopy and canopy cases.
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Dates et versions

hal-03378677 , version 1 (14-10-2021)

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  • HAL Id : hal-03378677 , version 1

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Jean-Luc Dupuy, Vladimir Konovalov, François Pimont, Dominique Morvan, Rodman R. Linn. Assessment of the plume theory predictions of crown scorch using transport models. CFM 2009 - 19ème Congrès Français de Mécanique, Aug 2009, Marseille, France. ⟨hal-03378677⟩
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