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Divergence problem in jet engine combustion

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Old   July 7, 2014, 11:44
Default Divergence problem in jet engine combustion
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Ahmed
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Hi all,

I am modelling the combustion in a small turbojet engine (just the combustion chamber). I have built the solid model to be just the fluid domain (how do I add a screenshot?).

Its a non-premixed combustion, k-epsilon viscous model and P1 radiation. I haven't altered anything else in the solution controls before initialisation and solving.

The error I'm countering is this (after only <5 iterations):

# Divergence detected in AMG solver: pressure correction -> Turning off correction scaling!
# Divergence detected in AMG solver: pressure correction -> Increasing relaxation sweeps!

Error: Divergence detected in AMG solver: pressure correction
Error Object: #f

I suspect the problem is in the way I've set up the solver so I was hoping someone with more experience can tell me some potential causes.
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