Hi!

I was checking the monitored values of omega while running a k-w model. The w value seems to ever-increase while all others are decreasing. Is there a way to rectify this for k-w? Or should I ignore it? Is this due to free-stream w value?

How did you define your inlet w value? Check the following

VIST=DEN*TE/ED(omega)= 0.09*DEN*TE**2/ED(epsilon)

usually VIST and freestream turbulence is given.

If the above is not the problem, try decreasing relaxation factor.

Sheila

Thank u! I resolved the increasing w monitored value by letting it run another 1000+ iterations more where it eventually came to rest. But, your pointer is interesting! Where would I put this calculated w value in star-cd actually?

OK... understand your question from the other link now...

The values I mentioned are for INLET boundary condition.

Make sure your residual is low enough, the stopping of the changing of values does not necessarrily mean convergence.

Hope that helps. Sheila

BTW, when you are using k-w/SST models the w values have to be entered in the designated place of e. STAR will take these values as w.

Sheila

Ah thank u very much! All the while I've been using only the TI & Length. Forgot about the option of k-e which is k-w in the kw-sst model!! I hope u'd find answers to your q's. Sorry I couldn't help u there. U're more advanced.

Sorry, one last question! If I leave the turb. switch as TI & Length instead of k & E or w, will star-cd automatically convert the L into w?

I would assume so...