Numerical Investigation of the Effects of Environmental Parameters on the Simulation of Spread of Fire in Grasslands

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Norouzi, Mohammad | 2020

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 53260 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Farhanieh, Bijan; Afshin, Hossein
Abstract:
Fire in Grasslands is one of the most dangerous natural disasters that is uncontrollable at the time of its occurrence and will continue until there is a fundamental change in the conditions of the fire. Fire in Grasslands due to the high density of vegetation can produce a large amount of heat energy in a short time and in a very large area, which alone can cause the spread of fire in Grasslands. Today, numerical studies of fire behaviour and propagation are given more attention than experimental studies due to their lower costs and limitations. In the present study, the numerical simulation of the fire spread with the influence of climate parameters such as humidity, rainfall during fire and wind speed is investigated in FARSITE software. The simulation results show that the maximum Sorensen coefficient for changes in humidity, wind speed and precipitation duration is 0.8, 0.82 and 0.71, respectively. 0.58, 0.55 and 0.41 are obtained. The mean values of fire spread rate, flame length and fire line intensity between all scenarios in the study area are 0.09
Keywords:
Moisture ; Numerical Simulation ; Fire Dynamics ; Wind Speed Forecasting ; Rainfall During Fires ; Ambient Parameters ; Grasslands Fire ; Fire

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