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2007.137: A porous medium model for vegetation in bushfires

2007.137: J.W. Dold, J.B. Greenberg, R.O. Weber, A. Zinoviev and G. Sivashinsky (2005) A porous medium model for vegetation in bushfires. In: Proceedings of the 5th Asia Pacific Conference on Combustion, 17-20 July 2005, Adelaide.

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Abstract

The vegetation that burns in bushfires consists of water, pyrolysable material that can ultimately burn as a gas, solid combustible material (char) that is capable only of surface burning and unburnable material (ash). The vegetation is also a porous medium in which air, water vapour pyrolysis products and combustion products flow past solid material. This flow is strongly influenced by and interacts with the flow of air above the layer of vegetation. As unburnt vegetation, the material is all contained in objects of different size and shape, such as leaves, stalks, branches and trunks, all exhibiting different rates at which water and pyrolysis products can be generated through external heating, making some components much more susceptible to burning in a brief period while others would require longer time-scales; such material can often survive a fire. This article presents a sectional model for the vegetation in which different sizes of material are represented separately.

Item Type:Conference or Workshop Item (Paper)
Subjects:MSC 2000 > 35 Partial differential equations
MIMS number:2007.137
Deposited By:Mrs Louise Healey
Deposited On:14 November 2007

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