Difference between revisions of "WRF-SFIRE ignition"
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The fire starts from ignition lines with the given omidirectional ignition spread rate until | The fire starts from ignition lines with the given omidirectional ignition spread rate until | ||
a given ignition radius is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified the file namelist.input. Once a node is ignited, the normal fire propagation algorithm takes over from that node. For this reason, it is best when ignition points or lines lie on mesh nodes. Otherwise, if the ignition rate of spread is low, it may take a long time for the fire to reach mesh nodes, and nodes at different but small distances from the ignition line may ignite at times that are not intended. | a given ignition radius is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified the file namelist.input. Once a node is ignited, the normal fire propagation algorithm takes over from that node. For this reason, it is best when ignition points or lines lie on mesh nodes. Otherwise, if the ignition rate of spread is low, it may take a long time for the fire to reach mesh nodes, and nodes at different but small distances from the ignition line may ignite at times that are not intended. | ||
| + | |||
| + | ==Utility to find the nearest meshpoint== | ||
| + | |||
| + | Use the interactive Matlab utility '''clamp2mesh''' to find the nearest mesh point to your desired ignition location: | ||
| + | |||
| + | # run '''real.exe''' or '''ideal.exe''' to create your '''wrfinput''' files | ||
| + | # start Matlab in the '''WRFV3/test/em_fire''' directory in order to set up the search paths properly | ||
| + | # '''cd''' in Matlab to your run directory and run '''clamp2mesh''' | ||
| + | |||
| + | ==Works with== | ||
| + | * Matlab 2012a (possible earlier versions with native NetCDF support, starting from 2008) | ||
| + | * {{WRF-Fire-commit|e5b6a70fb937534e6cc5868b727fb941bfc04f8a|WRF-SFIRE June 15, 2013}} or later | ||
[[Category:WRF-Fire]] | [[Category:WRF-Fire]] | ||
Revision as of 20:48, 15 June 2013
- Back to the WRF-SFIRE user guide.
The fire starts from ignition lines with the given omidirectional ignition spread rate until a given ignition radius is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified the file namelist.input. Once a node is ignited, the normal fire propagation algorithm takes over from that node. For this reason, it is best when ignition points or lines lie on mesh nodes. Otherwise, if the ignition rate of spread is low, it may take a long time for the fire to reach mesh nodes, and nodes at different but small distances from the ignition line may ignite at times that are not intended.
Utility to find the nearest meshpoint
Use the interactive Matlab utility clamp2mesh to find the nearest mesh point to your desired ignition location:
- run real.exe or ideal.exe to create your wrfinput files
- start Matlab in the WRFV3/test/em_fire directory in order to set up the search paths properly
- cd in Matlab to your run directory and run clamp2mesh
Works with
- Matlab 2012a (possible earlier versions with native NetCDF support, starting from 2008)
- WRF-SFIRE June 15, 2013 or later