Weather

rate of wildfire spread

rate of wildfire spread

Postby armer » Thu Nov 26, 2009 4:38 pm
It would be cool to add this. Got this from the forest encyclopedia at

http://www.forestencyclopedia.net/p/p478

R=IR ξ(1+ ΦW + ΦS) / ρη ε Qig

where:

* R = rate of spread of the flaming front
* IR = reaction intensity (defined in Fire Intensity)
* ξ = proportion of the reaction intensity that heats adjacent fuel particles to ignition
* ΦW = dimensionless multiplier accounting for the effect of wind in increasing the proportion of heat that reaches adjacent fuels
* ΦS = dimensionless multiplier accounting for the effect of slope in increasing the proportion of heat that reaches adjacent fuels
* ρη = ovendry fuel per cubic foot of fuel bed (lb/ft)
* ε = dimensionless number accounting for the proportion of a fuel particle that is heated to ignition temperature at the time flaming combustion starts (near unity for fine fuels and decreases toward zero as fuel size increases)
* Qig = heat of pre-ignition, or the amount of heat required to ignite one pound of fuel (Btu/lb) (Pyne et al. 1996).
armer
 
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Re: rate of wildfire spread

Postby webalpha » Tue Dec 28, 2010 6:55 am
Could you please specify what you are supposed to mean by posting this thread. Would you like to integrate this information in this search engine?
webalpha
 
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