how to start fire at a time different from 0?

42 views
Skip to first unread message

Mohammad Tavakol

unread,
Jan 27, 2023, 1:32:37 PMJan 27
to FDS and Smokeview Discussions
Hello everyone. 
I am trying to simulate some field-scale grassland fires but the problem is that the fire starts exactly when the simulation is started and does not let the wind fully develop. So, i would be very thankful if you could help me how to solve this issue. how to start the fire at a desired time? 
I am using vents to start the ignition. 
Thank you

Kevin McGrattan

unread,
Jan 27, 2023, 1:47:14 PMJan 27
to fds...@googlegroups.com
Use a RAMP. More in the FDS User Guide.

Dave Sheppard

unread,
Jan 28, 2023, 1:07:45 PMJan 28
to FDS and Smokeview Discussions
If you want to start a model where there is an existing velocity field, try using a UVWFILE. This functionality is described in the 'Velocity Field' section of the user's guide.

To use this functionality you run a model (with or without a fire) and have the model develop its initial velocity field.  The velocity field in the domain can be saved in a UVWFile.

Then in subsequent models the UVWFile from the first run is used to define the initial velocity field at the start of the model runs.

Mohammad Tavakol

unread,
Jan 29, 2023, 4:37:58 PMJan 29
to FDS and Smokeview Discussions
Thanks every body. that was really helpful.
Reply all
Reply to author
Forward
0 new messages