Divergence in AMG solver
 

Hi friends,

Please help me;

I am trying to simulate combustion and define combustion reaction of CH4 and H2. I use DO radiation model but after some iteration an error occur and diverge solution. The message of divergence appear: "divergence detected in AMG solver: temperature -> increasing relaxation sweeps!"

I dont know how to repair it.

Also how to increase relation sweeps (for temperature!!)?

Thanks,

Hi Esmaeil ,
Have you gone through the following threads.. might help u

https://www.cfd-online.com/Forums/fl...on-sweeps.html

https://www.cfd-online.com/Forums/fl...on-sweeps.html

Dear Kummi, thanks for your reply
I change turbulent intensity and turbulent length scale in BCs and reduce them and try again. Fortunately so far fluent is running without problem and that message not appear.
I hope converge solution.

Dear Kummi, thanks for your reply
I change turbulent intensity and turbulent length scale in BCs and reduce them and try again. Fortunately so far fluent is running without problem and that message not appear.
I hope converge solution.