|March 8, 2011, 05:57||
Divergence detected in AMG solver : k
Join Date: Oct 2010
Posts: 6Rep Power: 10
I am currently trying to simulate a water flow into a nozzle for a atomisation. It's an internal flow with very small dimensions.
I am using the VOF method, with the water flow going through the air. Transient flow and turbulent (Realizable k-epsilon) are my conditions.
I have a Reynolds (for the Inlet) of about 3500.
I used a velocity inlet and pressure outlets. I used the turbulent intensity (that i calculated as a 5,7%) and turb viscosity ratio (that is around 12%)
My time step is 5e-7s, but my calculation always seem to diverge. (It says for the initialization that the courant number is around 3, but it gets very quickly to a higher number than the 250 bar over which Fluent doesn't continue)
Do i just adjust manually the under relaxation factors ? Is there may be something that some of you might help me with ?
Thank you in advance.
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