Comparison of the effect of one-way and two-way fire-wind coupling on the modelling of wildland fire propagation dynamics

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Abstract

Operational wildland fire propagation models are typically uncoupled from the wind field or they rely either on estimations extracted from an atmospheric model or on meteorological observations. This leads to a frozen wind field (one-way coupling) with a high degree of uncertainty, thus drifting away from the ground truth. In contrast, fully-coupled models (two-way coupling) comprise more accurate representations of the real phenomena, although they are not viable for operational use due to the hefty computational effort they entail. This article investigates and compares the effects of one-way and two-way wind-fire coupling on the predicted propagation of wildfires. The models are validated against experimental data obtained from grassland experiments carried out by the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia. Simulations are carried out on a flat surface and for different wind speeds. Two scenarious are considered, one with and the other without an obstactle affecting both the wind flow and the wildfire propagation. Results from the simulations indicate that the burnt area and the rate of spread (RoS) are both smaller in two-way coupled than in one-way coupled models.
Original languageEnglish
Title of host publicationAdvances in Forest Fire Research
EditorsDomingos Xavier Viegas, Luís Mário Ribeiro
PublisherCoimbra University Press
Pages115–121
Number of pages7
Volume2022
ISBN (Electronic) 978-989-26-2298-9
ISBN (Print)978-989-26-2297-2
DOIs
Publication statusPublished - Dec 2022
EventIX International Conference on Forest Fire Research & 17th International Wildland Fire Safety Summit - Coimbra, Portugal
Duration: 11 Nov 202218 Nov 2022
Conference number: 9
https://www.adai.pt/newevent/event/home/index.php?target=home&event=4&defLang=2

Conference

ConferenceIX International Conference on Forest Fire Research & 17th International Wildland Fire Safety Summit
Country/TerritoryPortugal
CityCoimbra
Period11/11/2218/11/22
Internet address

Bibliographical note

Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND 4.0)

Keywords

  • Wildland fire
  • WFDS Level-set
  • static wind field
  • two-way coupling

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