Problems with residuals
 

Hello again,

at first I want to thank you for replying my posts. It's a real luck that there are platforms like this where helpful people support beginners like me with software proplems. So here is my question: For my steadystate simulation of an agitator vessel I cannot find a good timescale mode to minimize the residuals. I think that y know the reason for this unsatisfactory residuals: as a result of the turbulence eddies the cfx solver cannot find a steady state operating point in the agitator area. So I think it is necessary to know the frequency of this eddy formation. Is there a possibillity to calculate this frequency with cfx?

Thank you very much for replying Martin

Re: Problems with residuals
 

Estimate it analytically using the tangential velocity of the blades and a guestimated strouhal number.

Analytical fluid dynamics + CFD = Win

CFD on its own = Colourfull fluid dynamics

Re: Problems with residuals
 

Joe , good job Indeed, the basics of CFD is fluid dynamics.