Document


Title

Study of the jump fire produced by the interaction of two oblique fire fronts. Part 1. Analytical model and validation with no-slope laboratory experiments
Document Type: Journal Article
Author(s): Domingos Xavier Viegas; Jorge R. Raposo; David A. Davim; Carlos G. Rossa
Publication Year: 2012

Cataloging Information

Keyword(s):
  • Australia
  • Australian Capital Territory
  • converging fire fronts
  • converging fronts
  • fire case histories
  • fire growth
  • fire interactions
  • fire management
  • forest management
  • heat
  • heat transfer
  • laboratory experiments
  • laboratory fires
  • rate of spread
  • sloping terrain
  • statistical analysis
  • wildfires
  • wind
Topic(s):
Record Maintained By:
Record Last Modified: September 3, 2019
FRAMES Record Number: 51168
Tall Timbers Record Number: 27970
TTRS Location Status: In-file
TTRS Call Number: Journals - I
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

When two fires approach each other, convective and radiative heat transfer processes are greatly enhanced. The interaction between two linear fire fronts making an angle θoi between them is of particular interest as it produces a very rapid advance of their intersection point with intense radiation and convection activity in the space between the fire lines. This fire is designated here as a 'jump fire' for when the value of θoi is small, the intersection point of the fire lines can reach unusually high rate of spread values that decrease afterwards in the course of time. A very simple analytical model based on the concept of energy concentration between the fire lines is proposed to explain this behaviour, which in large-scale fires can be of great concern to personnel and property safety. Experimental tests performed at laboratory scale on a horizontal fuel bed confirmed the basic assumptions of the model and provide a framework to extend the present analysis to more general conditions, namely to explain the behaviour of real fires. Given the rapid changes in fire behaviour, 'jump fires' can be considered as a form of extreme fire behaviour.

Online Link(s):
Citation:
Viegas, Domingos X.; Raposo, Jorge R.; Davim, David A.; Rossa, Carlos G. 2012. Study of the jump fire produced by the interaction of two oblique fire fronts. Part 1. Analytical model and validation with no-slope laboratory experiments. International Journal of Wildland Fire 21(7):843-856.