Numerical simulation of the effect of fire intensity on wind driven surface fire and its impact on an idealized building
Document Type: Journal Article
Author(s): Ali Edalati-nejad; Maryam Ghodrat; Sayyed Aboozar Fanaee; Albert Simeoni
Publication Year: 2022

Cataloging Information

  • fire intensity
  • fire intensity
  • fire simulation
  • fire-wind interaction
  • FireFOAM
  • LES - Large Eddy Simulation
  • wildfires
  • wind structure
Record Maintained By:
Record Last Modified: February 10, 2022
FRAMES Record Number: 65258


This paper presents an investigation on the effect of fire intensity of a wind driven surface fire, similar to a large wildfire, on an idealized structure located downstream from the fire source. A numerical simulation was conducted using an open source CFD code called FireFOAM, which is a transient solver for fire simulation and turbulent diffusion flames, supported by a large eddy simulation (LES) solver for incompressible flow. The numerical data were verified using the aerodynamic experimental data of a full-scale building model with no fire effects. An idealized cubic obstacle representing a simplified building with the dimension of 6 × 6 × 6 m; is considered downstream from the fire source. Different fire intensity values of the fire line representing different grassland fuels were simulated to analyse the impact of wind-fire interaction on a built area. To solve the problem, a coupled velocity and pressure method was applied through a PIMPLE scheme in FireFoam solver of OpenFoam platform. There is a good agreement between simulated results and experimental measurements with a maximum error of 18%, which confirms the validity and accuracy of the model. The results showed that by increasing the fire intensity; the velocity of the crosswind stream increases, which causes low-density air and generates an extra stream behind the fire plume. It was also found that increasing fire intensity from 10 MW/m to 18 MW/m raises the integrated temperature on the ground near the building and on the surface of the building by 26%, and 69%, respectively.

Online Link(s):
Edalati-nejad, Ali; Ghodrat, Maryam; Fanaee, Sayyed Aboozar; Simeoni, Albert. 2022. Numerical simulation of the effect of fire intensity on wind driven surface fire and its impact on an idealized building. Fire 5(1):17.