[cheetthe1]

Hi, I managed to overcome initial issues and would like to run my reactive jet-in-crossflow model. Cold flow converges well, for the reactive part I am running into stuck residuals. It seems the governing equtions (Coupled Implicit solver) give me some trouble.


1) Is it the proper way to start running with very small under-relax factors for the reactive part? This is the only way it would not diverge. The star guide recommends running with high values.


2) The highest under-relax factors I can really reach for the reactive part are 0.1 .. 0.2. Setting it higher will diverge. I have also tried starting off with lower order numerics, was not really helpful.


thank you for your recommendations


Cheet