Coupled assessment of fire behaviour and firebrand dynamics

Jan C. Thomas, Eric Mueller, Michael Gallagher, Kenneth L. Clark, Nicholas S. Skowronski, Albert Simeoni, Rory M. Hadden*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The hazards associated with firebrands have been well documented. However, there exist few studies that allow the hazard from a given fire to be quantified. To develop predictive tools to evaluate this hazard, it is necessary to under-stand the conditions that govern firebrand generation and those that affect firebrand deposition. A method is presented that allows time resolved measurements of fire behaviour to be related to the dynamics of firebrand deposition. Fire-brand dynamics were recorded in three fires undertaken in two different ecosystems. Fire intensity is shown to drive firebrand generation and firebrand deposition – higher global fire intensities resulting in the deposition of more, larger firebrands at a given distance from the fire front. Local firebrand dynamics are also shown to dominate the temporal firebrand deposition with periods of high fire intensity within a fire resulting in firebrand shower at deposition sites at times commensurate with firebrand transport. For the range of conditions studied, firebrand deposition can be expected up to 200 m ahead of the fire line based on extrapolation from the measurements.
Original languageEnglish
Article number650580
Number of pages16
JournalFrontiers in Mechanical Engineering
Volume7
Early online date16 Dec 2021
DOIs
Publication statusE-pub ahead of print - 16 Dec 2021

Keywords / Materials (for Non-textual outputs)

  • firebrands
  • wildland-urban interface
  • WUI fires
  • fire behaviour
  • spread rate
  • firebrand generation
  • firebrand deposition
  • prescribed fire planning

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