XiFoam simulation error
I am trying to run a simulation in XiFoam with an object from snappyHexMesh.
After running blockMesh, snappyHexMesh -overwrite and XiFoam in time step 0.00158 I get this error.
I suspect that somewhere XiFoam divides with 0 as it is a common problem with Floating Point error.
I would really appreciate any help that you could provide as this will help progress my dissertation.
The following link has the case file
Please take a look.
That error message is indicating that a square root has gone very wrong ;)
But you could have posted what truly lead to this crash:
:eek: although, around "Time=0.001523", it dropped "deltaT" to "9.26622e-12", making it rather impractical to simulate.
Oh, and the "sqrt" problem was due to the temperature being out of range and leading to one of the calculations after that to use bad values.
After taking a look at the geometry, I suggest the following:
Thanks a lot for the comments.
I know the simulation wasn't good as I started working with XiFoam this Friday and this was a first trial but I wanted to see what was wrong.
Do you have any suggestions for mesh in combustion? Actually at the end I want simulate a transition from subsonic combustion to supersonic combustion (detonation).
I changed the geometry a bit and the endTime of the simulation.
I left the mesh coarse as I want to run very quick simulations and I dont want to spend time waiting (I am not looking for results at this stage).
From paraView I can see the movement of the gas and the combustion which seems quite logical but after a certain time the temperature reaches weird numbers. I uploaded this case on the link above. Could you tell me what's the problem with the temperatures?
PS: Do you know anyone that could set up an accurate combustion with good mesh in case I need it? (with a payment of course for his time)
Thanks a lot
I'm really short for time. Only around the 28th will I be able to try and look into this :(.
As for someone to help you, right now I can only remember the freelancers forum: http://www.cfd-online.com/Forums/cfd-freelancers/
Now that I think a bit more about it... you can also try contacting Tobi: http://www.cfd-online.com/Forums/members/tobi.html
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