Convergence Question
 

Dear All,

I have a small question regarding convergence and I would be most grateful if any one can answer it.

I did a 2D problem earlier of a wing and it took the lift and drag about 8000 iterations to converge, however I modelled the similar wing in 3D and this time it the solver about 2500 iterations to converge on a solution.

My question is how come this happened even though I have used similar boundary conditions and turbulence model? Is 3D quick compared to 2D?

Any suggestions would be greatly appreciated.

Thanks in advance.

James

Re: Convergence Question
 

Looks like there might be some problem. Did you change any of the Under-relaxation factors?

Re: Convergence Question
 

Hi,

No I did not change any thing!

Thanks, James