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Title	A reexamination of fire spread in free-burning porous fuel beds.
Creator	Wilson, Ralph A.
Contributor	Intermountain Forest and Range Experiment Station (Ogden, Utah)
Description	Experimental evidence from 250 test fires confirms the general formulation of Rothermel's 1972 mathematical model for predicting fire spread in wildland fuels. Numerical coefficients are reevaluated for the empirical relations governed by fuel bed geometry. Fuel moisture damping is functionally separated from extinction phenomena. Hypotheses are proposed that propagation flux is related to the optical density of the fuel bed; that the burning mass loss rate of different fuel size classes is proportional to fuel particle surface area; and that the marginal limit of self-sustained burning is dependent on the total surface area in the bed as well as the fuel moisture content. Difficulties of measurement and physical interpretation of reaction intensities are discussed.
Publisher	Ogden, Utah : U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982.
Subject	Flame spread - - Mathematical models. ; <br> Wildfires - - Prevention and control - - Mathematical models.
Relation	Research paper INT ; 289
Source	A 13.78:INT-289
Date Original	1982-06-01
Date Digital	2007;
Type	text
Format	application/pdf
Resource Identifier	mtg002092
Contributing Institution	The University of Montana
Language	en
Digitization Specifications	Scanned by Lacey Gibbons using an OpticBook 3600 scanner at 400 dpi, 8 bit gray scale. Master images stored as TIFF and derivatives presented as PDF. Abbey FineReader 8.0 used for optical character recognition.

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