FDS error

[ahmedahmed2056]

Hello
I am simulating wildfire with different environmental conditions .. all the environmental ranges works well except for one combination

that is temp = 0, wind speed=20, wind direction =4 and steep slope of 40

Slurm.out containing the error is as follow

Fire Dynamics Simulator

Time Step: 1, Simulation Time: 0.002 s
Time Step: 2, Simulation Time: 0.003 s
Time Step: 3, Simulation Time: 0.005 s
Time Step: 4, Simulation Time: 0.006 s
Time Step: 5, Simulation Time: 0.007 s
Time Step: 6, Simulation Time: 0.008 s
Time Step: 7, Simulation Time: 0.009 s
Time Step: 8, Simulation Time: 0.010 s
Time Step: 9, Simulation Time: 0.01 s
Time Step: 10, Simulation Time: 0.01 s
Time Step: 20, Simulation Time: 0.02 s
Time Step: 30, Simulation Time: 0.04 s
Time Step: 40, Simulation Time: 0.05 s
Time Step: 50, Simulation Time: 0.06 s
Time Step: 60, Simulation Time: 0.07 s
Time Step: 70, Simulation Time: 0.08 s
Time Step: 80, Simulation Time: 0.10 s
Time Step: 90, Simulation Time: 0.11 s
Time Step: 100, Simulation Time: 0.12 s
Time Step: 200, Simulation Time: 0.26 s
Time Step: 300, Simulation Time: 0.41 s
Time Step: 400, Simulation Time: 0.58 s
Time Step: 500, Simulation Time: 0.74 s
Time Step: 600, Simulation Time: 0.90 s
Time Step: 700, Simulation Time: 1.05 s
Time Step: 800, Simulation Time: 1.21 s
Time Step: 900, Simulation Time: 1.38 s
Time Step: 1000, Simulation Time: 1.54 s
Time Step: 1100, Simulation Time: 1.70 s
Time Step: 1200, Simulation Time: 1.86 s
Time Step: 1300, Simulation Time: 2.01 s
Time Step: 1400, Simulation Time: 2.18 s
Time Step: 1500, Simulation Time: 2.36 s
Time Step: 1600, Simulation Time: 2.54 s
Time Step: 1700, Simulation Time: 2.71 s
Time Step: 1800, Simulation Time: 2.89 s
Time Step: 1900, Simulation Time: 3.06 s
Time Step: 2000, Simulation Time: 3.24 s
Time Step: 2100, Simulation Time: 3.41 s
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
Time Step: 2200, Simulation Time: 3.59 s
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
WARNING: Minimum density, 0.129 kg/m3, clipped in Mesh 9
Time Step: 2222, Simulation Time: 3.59 s

[mcgratta]

Your simulation stopped with a numerical instability. I do not understand why you have dumped all this other information into your message. There is guidance in the User's Guide as to what to look for. If you cannot find the problem, start an issue and submit the FDS input file as a .txt.

[ahmedahmed2056]

Thanks for you reply. I have removed the unimportant information from the thread. and I will search for it as you said. Thanks