A Coupled AtmosphereFire Model: Convective Feedback on Fire-Line Dynamics

Clark, Terry L.; Jenkins, Mary Ann; Coen, Janice L.; Packham, David

doi:10.1175/1520-0450(1996)035<0875:acamcf>2.0.co;2

Cited by 176 publications

(177 citation statements)

References 19 publications

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“…Again, the grid size used in her work was in the order of 100 m. The large scale studies help the understanding of the meteorological impact of bushfires but could not help resolving issues related to buildings. At a relatively smaller scale, or at the near ground level scale, focus has been directed towards the influence of wind on fire spread [24,25]. Little attention has been given to the study of the influence of bushfire on wind and the consequential impact on building structures using domain sizes comparable to buildings and grid sizes significantly smaller than the boundary layer thickness until recently.…”

Section: Overviewmentioning

confidence: 99%

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

He¹,

Kwok²,

Douglas³

et al. 2011

Fire Safety Science - Proceedings of the 10th International Sym

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Presented in this paper are the results of a numerical study on bushfire, wind and structure interactions. The association of bushfires with wind has long been recognized. However, the mechanism of their interaction has not received due attention. In the current study a computational fluid dynamics package was used to reveal the enhancement of wind by fires at scales comparable to buildings and the impact on buildings. The study also revealed a pulsation movement of flames under the influence of free stream wind conditions. The predicted pressure coefficient distribution around a building under no-fire condition was compared with the experimental result measured by others. Reasonably good agreement was obtained before a fire was added to reveal the impact of the fire.KEYWORDS: CFD, modeling, pressure coefficient, pulsation, velocity, wildfires. NOMENCLATURE LISTINGnormalized power spectrum (energy fraction at given frequency) (s)

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Section: Overviewmentioning

confidence: 99%

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

He¹,

Kwok²,

Douglas³

et al. 2011

Fire Safety Science - Proceedings of the 10th International Sym

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“…More recently, Luderer et al (2006) and Trentmann et al (2006) used the ATHAM model to perform 3-D simulations and sensitivity studies on the smoke injection into the lower stratosphere by the Chisholm forest fire in Canada in May 2001. Coupled atmosphere-fire models have been proposed by several authors (Clark et al, 1996;Grishin, 1996;Clark et al, 2003) and include detailed interaction between the atmosphere and combusting material. However, these models have the enormous task of taking into account all the relevant spatial scales, which span six to seven orders of magnitude (Clark et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models

et al. 2007

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Abstract. We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmosphericchemistry transport models. This sub-grid transport mechanism is simulated by embedding a 1-D cloud-resolving model with appropriate lower boundary conditions in each column of the 3-D host model. Through assimilation of remote sensing fire products, we recognize which columns have fires. Using a land use dataset appropriate fire properties are selected. The host model provides the environmental conditions, allowing the plume rise to be simulated explicitly. The derived height of the plume is then used in the source emission field of the host model to determine the effective injection height, releasing the material emitted during the flaming phase at this height. Model results are compared with CO aircraft profiles from an Amazon basin field campaign and with satellite data, showing the huge impact that this mechanism has on model performance. We also show the relative role of each main vertical transport mechanisms, shallow and deep moist convection and the pyro-convection (dry or moist) induced by vegetation fires, on the distribution of biomass burning CO emissions in the troposphere.

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“…2). The model is able to run faster than real time on several hundred cores, with the fire-model resolution of a few meters and horizontal atmospheric resolution on the order of 100 m for a large real fire (Jordanov WRF-SFIRE has evolved from the Coupled AtmosphereWildland Fire Environment (CAWFE) (Clark et al, 1996a(Clark et al, , b, 2004Coen, 2005), which consists of the Clark-Hall atmospheric model, coupled with fire spread implemented by tracers. The SFIRE code currently supports the semiempirical fire-spread model of Rothermel (1972), inherited from the CAWFE code.…”

Section: Introductionmentioning

confidence: 99%

Recent advances and applications of WRF–SFIRE

Mandel

Amram

Beezley

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Coupled atmosphere-fire models can now generate forecasts in real time, owing to recent advances in computational capabilities. WRF-SFIRE consists of the Weather Research and Forecasting (WRF) model coupled with the fire-spread model SFIRE. This paper presents new developments, which were introduced as a response to the needs of the community interested in operational testing of WRF-SFIRE. These developments include a fuel-moisture model and a fuel-moisture-data-assimilation system based on the Remote Automated Weather Stations (RAWS) observations, allowing for fire simulations across landscapes and time scales of varying fuel-moisture conditions. The paper also describes the implementation of a coupling with the atmospheric chemistry and aerosol schemes in WRF-Chem, which allows for a simulation of smoke dispersion and effects of fires on air quality. There is also a data-assimilation method, which provides the capability of starting the fire simulations from an observed fire perimeter, instead of an ignition point. Finally, an example of operational deployment in Israel, utilizing some of the new visualization and datamanagement tools, is presented.

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A Coupled AtmosphereFire Model: Convective Feedback on Fire-Line Dynamics

Cited by 176 publications

References 19 publications

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models

Recent advances and applications of WRF–SFIRE

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A Coupled AtmosphereFire Model: Convective Feedback on Fire-Line Dynamics

Cited by 176 publications

References 19 publications

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

Numerical Investigation of Bushfire-Wind Interaction and its Impact on Building Structure

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models

Recent advances and applications of WRF–SFIRE

Contact Info

Product

Resources

About

A Coupled AtmosphereFire Model: Convective Feedback on Fire-Line Dynamics