Divergence while using RSM turbulence model
Hello everyone,
i am running a simulation for different turbulence models for an airfoil. I am facing AMG divergence or sometimes FLOATING ERROR: OVERFLOW when i am shifting to RSM turbulence model. the procedure i am following is achieving convergence in Kepsilon at first place and then shifting to RSM, the following parameters i used in initial(Kepsilon) stage. Solver: pressure based, Greengauss node based Viscous: Standard Kepsilon Boundary conditions(under turbulence): K and epsilon Scheme: SIMPLE 1st order for 100 iterations then 2nd order(URF: momentum reduced to 0.5 from 2nd order) By about 4000 iterations convergence is achieved. NOW, i go back to viscous: under solver>viscous: RSM, linear pressure strain etc and rest kept the same(parameters which i used for kepsilon). By about 100 iterations AMG divergence occurred P.S: please correct me if i am doing anything wrong! do i have to initialize it again? thanks in advance bharat 
You don't have to initialize again, you can use the solution from kepsilon to converge with RSM.
I wonder if you are running into issues with your boundary conditions. Are you checking your Y+ values at the walls? 
Hey Casey,
Thanks for your comments. i'll keep that point in mind. and yes i am checking for y+ values. bharat 
Smells like a Fluent simulation to me. If so  why don't you post it in the Fluentdedicated forum?

All times are GMT 4. The time now is 16:57. 