Error subroutine erraction

eleazar · February 27, 2011, 04:44

Hi guys,

i am doing an aerodynamic calculation of an external aerodynamic of an aircraft, it is an supersonic simulation, 600meters per second, i apply the engine inlet as outlet, and the jet outle as inlet with 4 bar pressure and 800 miles per hour velocity and a temperature of 1000 C

my timestep is 1e-05 and i apply 1000 iterations on steady state.

after the 65 step i get this error....

any idea what is going on?

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Overflow |
|

ghorrocks · February 27, 2011, 06:36

Your simulation has had a divide by zero error. Usually this is because it diverged. You need to improve the numerical stability of your model with smaller timesteps, better initial conditions, better mesh quality or making sure your simulation is physically possible.

cfdgalaxy · February 28, 2011, 02:24

are you sure your units are all matching? i got this error when i was running a simulation and the problem turned out to be units.

February 27, 2011, 04:44	Error subroutine erraction	#1
eleazar Member Elena Cortin Join Date: Mar 2009 Location: Paris Posts: 65 Rep Power: 17	Hi guys, i am doing an aerodynamic calculation of an external aerodynamic of an aircraft, it is an supersonic simulation, 600meters per second, i apply the engine inlet as outlet, and the jet outle as inlet with 4 bar pressure and 800 miles per hour velocity and a temperature of 1000 C my timestep is 1e-05 and i apply 1000 iterations on steady state. after the 65 step i get this error.... any idea what is going on? +--------------------------------------------------------------------+ \| ERROR #001100279 has occurred in subroutine ErrAction. \| \| Message: \| \| Floating point exception: Overflow \| \|

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February 27, 2011, 06:36		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Your simulation has had a divide by zero error. Usually this is because it diverged. You need to improve the numerical stability of your model with smaller timesteps, better initial conditions, better mesh quality or making sure your simulation is physically possible.

February 28, 2011, 02:24		#3
cfdgalaxy New Member Join Date: Feb 2011 Posts: 4 Rep Power: 15	are you sure your units are all matching? i got this error when i was running a simulation and the problem turned out to be units.