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Showing 1 to 20 of 34 for “"fire spread"”.
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Modelling of fire spread and the growth of fire in buildings using computational fluid dynamics
… to contribute to the development of a model of fire spread over a surface, and to integrate this model with a computational fluid dynamics (CFD) model that is capable of making predictions of the environment associated with full-scale fires in enclosures. The research focuses on the growth and …
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The simulation of fire growth and spread within enclosures using an integrated CFD fire spread model
… within a CFD software framework to simulate fire in a compartment and fire growth and propagation in enclosures in which solid combustibles are involved through wall or ceiling linings. Gas phase combustion, radiation and solid fuel combustion are addressed in this study. At the heart of this …
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The use of GIS for the development of a fully embedded predictive fire model
Fire is very important for maintaining balance in the ecosystems and is used by fire management across the world to regulate growth of vegetation in natural conservation areas. However, improper management of fire may lead to hazardous behaviour. Fire modelling tools are implemented to provide fire …
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Fire and Fuels: Vegetation Change Over Time in the Zuni Mountains, New Mexico
… by human interference. Anthropogenically, fire suppression practices have allowed a buildup of fuels and caused a change in the fire-adapted ponderosa pine ecosystem such that the new ecosystem now incorporates many fire-intolerant species. As a result, the low-severity fires that the …
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A Fire Simulation Model for Heterogeneous Environments Using the Level Set Method
<p>Wildfire hazard and its destructive consequences have become a growing issue around the world especially in the context of global warming. An effective and efficient fire simulation model will make it possible to predict the fire spread and assist firefighters in the process of controlling the …
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Estimating the Heat Transfer from an Electric Vehicle Fire using Fire Dynamics Simulator
… thesis guidelines for modeling a vehicle using Fire Dynamics Simulator (FDS) and its relevant parameters are explored and documented through an estimation and comparison to experimental data. Vehicle construction consists of determining fire spread and subsequent burner delineation from analysis …
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Visualising convective heat transfer in a propagating wildland fire
Bushfires are a large destructive natural hazard, intensified by climate change and increasing human activity into wildland areas. Accurate prediction of fire behaviour is essential for mitigation strategies and emergency response. While radiative heat transfer has traditionally been emphasized in …
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Experimental and computational study of flames venting externally during full scale flashover fires
… during two series of full scale flashover fires. The purpose of the work is to investigate the likelihood of external fire spread from a burn room window with standard glass, when the external facade is non-combustible. The effects on externally venting flames of internal ventilation …
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Fire modelling of passenger trains
ENGLISH ABSTRACT: Train fires continue to pose a significant threat both internationally and in South Africa, particularly with the increasing prevalence of emerging hazards such as lithium-ion battery devices carried by passengers. With the introduction of the new X’Trapolis Mega fleet, it is …
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A Study Of Intermittent Convective Heating Effects On Fine Fuel Ignition
… on the ignition of fine fuels during wildland fire spread. In this study, a novel pulsed-gas line burner similar to a Rubens' tube, driven by acoustic oscillations, is used to re-create the pulsations observed in wildland fires in a controlled environment. After acoustically stimulating a long …
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Do trees suppress grass fuel loads? : canopy cover effects in South African savannas
… analysis of the savanna biome indicated that fire did not spread at tree canopy cover above 40%. This study investigates this relationship in a field study. It is possible that the type of tree (forest vs. savanna) may influence the amount of shade experienced by the understory and therefore …
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A LARGE EDDY SIMULATION STUDY OF THE EFFECTS OF WIND AND SLOPE ON THE STRUCTURE OF A TURBULENT LINE FIRE
… current fundamental understanding of wildland fire spread is limited. Wildland fire spread is affected by many parameters, but two of the most important parameters are wind and slope both of which tilt the flame and plume and bring them closer to the unburnt fuel, which, among other things, …
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Oil palm expansion and land cover changes in the Peruvian Amazon: implications for forest conservation and fire mitigation
… changes in climate are expected to increase fire incidence in Amazonia with detrimental consequences to human health, climate, and natural ecosystems. In this dissertation I developed remote sensing methods to map and quantify land cover changes attributed to oil palm expansion in the …
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Potential key drivers of thicket expansion in savanna
… Data on height growth, root suckering and fire damage were collected for two thicket forming species. A simulation model was developed to evaluate the effect of different biotic and abiotic factors on the spread of a thickerclump in savanna in the Hluhluwe Game Reserve, South Africa. The …
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Model Reduction of Nonlinear Fire Dynamics Models
… nature of the mathematical models for fires, current numerical models require too much computational effort to be useful in design and real-time decision making, especially when dealing with fires over large domains. To reduce the computational time while retaining the complexity of the …
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Firestorms in a mesic savanna-forest mosaic
… are maintained by positive feedback loops with fires, promoting fires in savannas and excluding fires in forests. Occasional extreme fires do however burn into forest edges and cause extensive mortality. So, while our understanding of bistability in these systems has advanced, our understanding …
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Vegetation and Forest Fire Dynamics in Alberta: A Ground and Remote Sensing Data Analysis
… analysis of the interplay between forest fires and vegetation dynamics in Alberta, Canada, under the lens of climate change. By synthesizing data from remote sensing, climate records, and fire databases, the study reveals the intricate relationships between vegetation cover changes and …
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GPGPU enabled CFD simulation for fully coupled fire and evacuation modelling
Traditionally fire and evacuation models are run independently of one another to ascertain two key building safety parameters: ASET (available safe evacuation time) determined by the fire spread; RSET (required safe exit time) determined by the evacuation model. A building can be deemed to be safe …
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Effects of repeated fire on the savanna / forest boundary
… stable states, among others, determined by fire ecology feedbacks. Bush encroachment has become an ever-increasing trend converting grassland and savanna biomes to forest/thicket. A severe firestorm occurred in the Hluhluwe-Umfolozi Game Reserve in north-eastern South Africa in September …
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