Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"fire behaviour"”.
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Investigation of the Fire Behaviour of PEEK-based Polymers and Compounds
… to describe the decomposition and flammability behaviour of PEEK, in order to develop new fire safe PEEK-based materials. By relating the measured thermal decomposition behaviour and changes in physical properties of PEEK materials to their performance in standard flammability tests, the …
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The differences in grass species composition and the effects on fire behaviour in an African mesic savanna
Fire is a key determinant of savanna dynamics, particularly with respect to its influence on vegetation dynamics. The grass species composition and structure of savannas have impacts on fire behaviour through their differing fuel characteristics related to each species specific phenologies and …
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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 development in passenger trains
… consisting of experiments and analysis of fire development in a passenger train carriage. The aim of this research is to use experiments, particularly a full-scale passenger train fire experiment, to increase understanding of fire behaviour in passenger trains and evaluate existing design …
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Fuel moisture and fuel dynamics in woodland and heathland vegetation of the Sydney Basin
… highly flammable and subject to a wide range of fire regimes. Sclerophyllous shrubs and sedges are common and in some vegetation types up to 70 % of fuel consumed during a fire can be live. Research into fire behaviour and fuel dynamics has been minimal. To address this issue this thesis …
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The derivation of fire hazard indices and burning prescriptions from climatic and ecological features of the fynbos biome
This study deals with the development of fire behaviour prediction and fire danger rating systems, and their potential use in fynbos catchment areas. Fynbos catchments are managed for sustained water yields and for nature conservation. Wildfires have always been a problem in these areas, and early …
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The derivation of fire hazard indices and burning prescriptions from climatic and ecological features of the fynbos biome
This study deals with the development of fire behaviour prediction and fire danger rating systems, and their potential use in fynbos catchment areas. Fynbos catchments are managed for sustained water yields and for nature conservation. Wildfires have always been a problem in these areas, and early …
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Wildfire path spread prediction system using machine learning: use of ANN, convolutional autoencoder, and ConvLSTM ML model
… the years, the frequency and intensity of wildfires have increased due to climate change, old fire management practices, and other environmental factors [1]. These wildfires pose a threat to ecosystems, infrastructure, property, and lives, particularly in highly susceptible Mediterranean …
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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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Modeling full-scale fire test behaviour of polyurethane foams using cone calorimeter data
… use of these polymeric materials causes fire safety concerns. This has led to the development of various regulations and flammability test standards aimed at addressing the hazards associated with polyurethane foam fires. Several fire protection engineering correlations and thermal models …
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Behaviour of Fibre Reinforced Polymer Confined Reinforced Concrete Columns Under Fire Condition
… requirements. However, concerns associated with fire remain an obstacle to applications of FRP materials in buildings and parking garages due to FRP’s sensitivity to high temperatures as compared with other structural materials and to limited knowledge on their thermal and mechanical behaviour in …
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Response Surface Modelling of Monte-Carlo Fire Data
Deterministic computer fire models have progressed over recent years to the point of providing good predictions for some parameters of fire behaviour. However, input data are not always available, and many factors that affect the course of a fire are probabilistic in nature and cannot be determined …
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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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Turning up the heat: fire ecology and climate adaptive silviculture in longleaf pine forests
Frequent fire is required to maintain the characteristic structure, function, and high biodiversity of longleaf pine woodlands. Longleaf pine regeneration is exposed to this frequent fire, yet persists as both patches and single tree regeneration. While research has shown that this regeneration …
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Application of multiple unmanned aircraft systems (UAS) for bushfire mitigation
… making phases. Currently in the case of bushfires disaster response services rely on watchtowers, manned aircraft and satellite data for information. Advances in technology such as the development of sense-and-avoid systems will soon allow Unmanned Aircraft Systems (UAS) to be flown alongside …
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Experimental Testing and Numerical Modelling of Thermal Runaway in 18650 Lithium-Ion Batteries
… in seconds, and often resistant to conventional fire suppression systems. A deeper understanding of TR is vital for developing effective mitigation strategies. This research investigates TR behaviour in commercially available 18650 cylindrical LIBs and develops numerical models using ANSYS …
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Studying wildfire spread using stationary burners
… instabilities important to fundamental wildland fire behaviour has been developed. This thesis focuses on experiments performed with stationary fires to carefully study instabilities observed in spreading fires that suggest they play a critical role in fire spread. Two types of flow conditions …
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Anthropogenic modification of the natural fire landscape and its consequences for vegetation patterns on the Cape Peninsula
Understanding the spatial probability of fire and how urban development may alter natural patterns is particularly important in areas where alternate ecosystem states occur at fine spatial scales. The Cape Peninsula, South Africa, is a one such region where fire-sensitive forest patches occur …
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The Use of Numerical Methods to Interpret Polymer Decomposition Data
Polymer decomposition is the key to understanding fire behaviour. It is a complex process involving heat transfer, breakdown of the polymer chain, volatile fuel formation and gasification occurring as a moving interface through the polymer bulk. Two techniques, chemical analysis using STA-FTIR, and …
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