Stirred tank convergence issue
 

hi friends
i am simulating a stirred tank using mrf in ansys 14.0 . i am using SIMPLE presure -velocity and first order discretization scheme, once it partially converge then i switch to QUICK..I am able to converge to 10^-3 but i want it to converge till 10^-4. the problem is that all the errors in residuals goes to 10^-4 exept for 'epsilon'.what should i do.plz help:confused:

the convergence graph is something like this
http://i39.tinypic.com/2z8bu6p.jpg
can i say that i converged it to 10^-4 .i did around 9000 iterations

Try to reduce the relaxation factor for turbulent quantities. I hope it can be help you.

Regards
Eakarach

Hi,
it seems converged to me; try to create some monitor surfaces and monitor some variables such as velocity for example; if that variable doesn't change solution is converged.

Daniele