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A Three-dimensional Mathematical Model For The Pyrolysis Of Wet Wood

Yuen, R., Casey, R., De Vahl Davis, G., Leonardi, E., Yeoh, G.H., Chandrasekaran, V. and Grubits, S.J., 1997. A Three-dimensional Mathematical Model For The Pyrolysis Of Wet Wood. Fire Safety Science 5: 189-200. doi:10.3801/IAFSS.FSS.5-189


A three-dimensional mathematical model for the pyrolysis of wet wood including a detailed consideration of the evaporation of moisture, anisotropic and variable properties, and pressure driven internal convection of gases in wood has been developed. A computational code has been formulated modeling multiple competing reactions for up to six constituents, although a single first order Arrhenius reaction is adopted in the results presented. The pyrolysis of a beech wood cube with different initial moisture contents has been computed for a range of furnace temperatures. The Arrhenius kinetic parameters have been determined by a method of best fit to the experimental results of Bonnefoy et a1 [16]. The values agree very we1 with the range of kinetic data reported by Tinney [4]. The computed results giving a full 3-D description of the transient chemical and physical processes of the pyrolysis of a wet wooden cube heated in a furnace are presented. The influences of the anisotropic properties due to the grain structure on heat and mass transfers in pyrolysing wood are discussed.


anisotropy, evaporation, heat transfer, kinetic data, mass transfer, modeling, moisture content, pyrolysis, wood

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