CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   STAR-CCM+ (http://www.cfd-online.com/Forums/star-ccm/)
-   -   Stable LowRE model (http://www.cfd-online.com/Forums/star-ccm/98350-stable-lowre-model.html)

M10 March 8, 2012 15:00

Stable LowRE model
 
Hi,

I'm having difficulty obtaining a cleanly converged solution when for lowRe simulation. I've tried Standard k-e lowRe, AKN-k-e, and both of them produce answers that are quite oscillatory for all iteration counts. For the range of Re = 1e4-1e5, what are the reasonable turbulence models people use?

Thanks.

abdul099 March 10, 2012 03:46

Usually oscillations are no issue but physical behaviour. There are just a few really steady flows, you can nearly count them with the fingers of your hands. Most physical problems are unsteady, especially for higher Reynolds numbers.
So I assume, your chosen turbulence model is fine and the oscillations are just because the sovler tries to solve the physics.


All times are GMT -4. The time now is 20:19.