Improving Parameterization of Combustion Processes in Coupled Fire-Atmosphere Models through Infrared Remote Sensing
Abstract
The overall goal of this project was to improve the representation of combustion processes in coupled fire-atmosphere models operating at the landscape level. Models intended to be used for landscape-scale fires (hundreds of meters to 10s of kilometers), typically divide the simulation domain up into a mesh of grid cells and these grid cells typically range in size from 1-30 meters on a side. As the processes governing combustion occur on considerably smaller scales, models require a means of describing these processes capable of dealing with heterogeneity within a cell and must also be scalable if the cell size is changed. A detailed examination of these combustion processes will improve our understanding of fine-fuel heat exchange, ignition, and fire spread and how fire behavior may be affected by fuel conditions. The specific objectives of the project are to: 1) Track real-time high-resolution fuel moisture dynamics and fuel consumption at sub-meter scale in natural fuel beds containing both live and dead fuels; 2) Evaluate the subgrid-scale parameterization of solid-phase combustion used in a coupled fire-atmosphere models; 3) Examine how model resolution affects the level of detail required in subgrid scale models of combustion processes; 4) Examine interactions among fuel heterogeneity, in both arrangement and load that influences fire spread, principally through fire-atmosphere interactions
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 2022
- Accession Number
- AD1223875
Entities
People
- E. L. Loudermilk
- Ginny Marshall
- Joseph J. O'Brien
- Rodman R. Linn
- Scott L. Goodrick
Organizations
- Canadian Forest Service
- Los Alamos National Laboratory