A JFSP Fire Science Exchange Network
Bringing People Together & Sharing Knowledge in the Northern Rockies

On the non-monotonic behaviour of fire spread

Author(s): Domingos Xavier Viegas, J. R. Raposo, Carlos Ribeiro, Luís Carlos Duarte Reis, Abdelrahman Abouali, Carlos Viegas
Year Published: 2021

A conceptual model based on the dynamic interaction between fire, the fuel bed and the surrounding flow to explain the non-monotonic or intermittent behaviour of fires is proposed. According to the model, even in nominally permanent and uniform boundary conditions, the fire-induced flow modifies the geometry of the flame and its rate of spread. After an initial acceleration, there is a reduction in the rate of spread followed by one or more cycles of growth. Carefully controlled experiments of fires in slopes and canyons show that the evolution of fire properties, namely flame angle and rate of spread, have high-frequency oscillations superimposed on the low-frequency fire growth cycle described above.

Citation: Viegas, Domingos Xavier Filomeno Carlos; Raposo, Jorge Rafael Nogueira; Ribeiro, Carlos Fernando Morgado; Reis, Luís Carlos Duarte; Abouali, Abdelrahman; Viegas, Carlos Xavier Pais. 2021. On the non-monotonic behaviour of fire spread. International Journal of Wildland Fire 30(9):702-719. https://doi.org/10.1071/WF21016
Topic(s): Fire Behavior, Simulation Modeling, Fuels
Ecosystem(s): None
Document Type: Book or Chapter or Journal Article
NRFSN number: 23664
FRAMES RCS number: 64450
Record updated: Oct 19, 2021