WRF-SFIRE ignition - Revision history

Jmandel: Jmandel moved page WRF-Fire ignition to WRF-SFIRE ignition

2021-08-03T04:06:00Z

Jmandel moved page WRF-Fire ignition to WRF-SFIRE ignition

← Older revision	Revision as of 04:06, 3 August 2021
(No difference)

Jmandel at 22:57, 6 January 2016

2016-01-06T22:57:30Z

← Older revision		Revision as of 22:57, 6 January 2016
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	You can pick your ignition point from the fire mesh nodes. Their coordinates are in the variables '''FXLONG''' and '''FXLAT''' in the '''wrfinput''' file, after you run '''real.exe''' or '''ideal.exe'''.		You can pick your ignition point from the fire mesh nodes. Their coordinates are in the variables '''FXLONG''' and '''FXLAT''' in the '''wrfinput''' file, after you run '''real.exe''' or '''ideal.exe'''.

	Alternatively, you can use the interactive Matlab utility ~~'''~~clamp2mesh~~'''~~ to find the nearest mesh point to your desired ignition location automatically:		Alternatively, you can use the interactive Matlab utility {{wrf-fire-path\|other/Matlab/vis3d/clamp2mesh.m\|clamp2mesh.m}} to find the nearest mesh point to your desired ignition location automatically:

	# run '''real.exe''' or '''ideal.exe''' to create your '''wrfinput''' files		# run '''real.exe''' or '''ideal.exe''' to create your '''wrfinput''' files

Jmandel at 21:04, 15 June 2013

2013-06-15T21:04:27Z

← Older revision		Revision as of 21:04, 15 June 2013
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	The fire starts from ignition lines with the given omidirectional ignition spread '''fire_ignition_ros''' rate until		The fire starts from ignition lines with the given omidirectional ignition spread '''fire_ignition_ros''' rate until
	the given ignition radius, '''fire_ignition_radius''', is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified in 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 to ~~make~~ ignition points (or endpoints of the ignition line) from fire model 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.		the given ignition radius, '''fire_ignition_radius''', is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified in 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 to choose ignition points (or endpoints of the ignition line) from fire model 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.

	==Choosing ignition points on the mesh==		==Choosing ignition points on the mesh==

Jmandel: lead

2013-06-15T21:03:50Z

lead

← Older revision		Revision as of 21:03, 15 June 2013
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	{{users guide}}		{{users guide}}

	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 '''fire_ignition_ros''' 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.		the given ignition radius, '''fire_ignition_radius''', is reached. A single ignition point is specified as a line with both ends the same. The ignition is specified in 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 to make ignition points (or endpoints of the ignition line) from fire model 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.

	==Choosing ignition points on the mesh==		==Choosing ignition points on the mesh==

Jmandel: /* How to find the nearest meshpoint */

2013-06-15T21:00:28Z

How to find the nearest meshpoint

← Older revision		Revision as of 21:00, 15 June 2013
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	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.

	==~~How to find~~ the ~~nearest meshpoint~~==		==Choosing ignition points on the mesh==

	You can pick your ignition point from the fire mesh nodes. Their coordinates are in the variables '''FXLONG''' and '''FXLAT''' in the '''wrfinput''' file, after you run '''real.exe''' or '''ideal.exe'''.		You can pick your ignition point from the fire mesh nodes. Their coordinates are in the variables '''FXLONG''' and '''FXLAT''' in the '''wrfinput''' file, after you run '''real.exe''' or '''ideal.exe'''.

Jmandel: /* Works with */

2013-06-15T20:59:40Z

Works with

← Older revision		Revision as of 20:59, 15 June 2013
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	==Works with==		==Works with==
	* Matlab 2012a (~~possible~~ earlier versions with native NetCDF support, starting from 2008)		* Matlab 2012a (probably also earlier versions with native NetCDF support, starting from 2008)
	* {{WRF-Fire-commit\|e5b6a70fb937534e6cc5868b727fb941bfc04f8a\|WRF-SFIRE June 15, 2013}} or later		* {{WRF-Fire-commit\|e5b6a70fb937534e6cc5868b727fb941bfc04f8a\|WRF-SFIRE June 15, 2013}} or later

	[[Category:WRF-Fire]]		[[Category:WRF-Fire]]

Jmandel: /* Utility to find the nearest meshpoint */

2013-06-15T20:56:56Z

Utility to find the nearest meshpoint

← Older revision		Revision as of 20:56, 15 June 2013
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	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==		==How to find the nearest meshpoint==

	~~Use~~ the interactive Matlab utility '''clamp2mesh''' to find the nearest mesh point to your desired ignition location:		You can pick your ignition point from the fire mesh nodes. Their coordinates are in the variables '''FXLONG''' and '''FXLAT''' in the '''wrfinput''' file, after you run '''real.exe''' or '''ideal.exe'''.

			Alternatively, you can use the interactive Matlab utility '''clamp2mesh''' to find the nearest mesh point to your desired ignition location automatically:

	# run '''real.exe''' or '''ideal.exe''' to create your '''wrfinput''' files		# 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		# 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'''		# '''cd''' in Matlab to your run directory and run '''clamp2mesh'''

	==Works with==		==Works with==

Jmandel: clamp2mesh

2013-06-15T20:48:35Z

clamp2mesh

@@ Line 3: / Line 3: @@
 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.
 [[Category:WRF-Fire]]

Jmandel: {{users guide}}

2011-09-18T09:01:17Z

← Older revision		Revision as of 09:01, 18 September 2011
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			{{users guide}}

	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.

	[[Category:WRF-Fire]]		[[Category:WRF-Fire]]

Jmandel: cp from old guide, wikified by Minjeong Kim

2011-09-18T08:59:40Z

cp from old guide, wikified by Minjeong Kim

New page

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.

[[Category:WRF-Fire]]