More Realistic Model of Tree Trunk Heating and Injury in Wildland Fires Now Available
Forest Service fire scientists and partners have developed fire and stem-heating models that predict tree stem heating and injury from spreading flame fronts. Tree trunks, unless they are small, are not heated evenly in surface fires. Instead, the trunk separates the flow of flames and wind, causing an eddy and standing leeward flame. These scientists are using a sophisticated fire model---the Wildland-Urban Interface (WUI) Fire Dynamics Simulator---to describe the interaction of flame and tree stem and generate input data for a stem injury model. In turn, FireStem2D inputs stem-surface-heating information and tree characteristics and predicts temperature rise in the bark and wood around the circumference of the trunk and the tissue injury that results. The development and linking of WUI Fire Dynamics Simulator and FireStem2D for tree injury prediction is part of a larger effort to build a sophisticated next-generation fire effects model based on a strong foundation in the biophysical processes involved.
Forest Service Partners