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aras May 19, 2011 23:53

k-e convergence criteria
I am solving a turbulence flow inside a pipe with many steps, complexities including lots of walls.

I am getting good convergence (below 1e-3) for velocities, and continuity.

but k and e are fluctuating in the range of 1e-2, is it ok? and generally what is the satisfactory range of convergence for k and e?


alastormoody11 May 20, 2011 06:29


Have you checked the validity of your mesh for using the k-e model, check whether the wall y plus values are in accordance with the recommended values suggested in the FLUENT manual.

I think the default values for the residuals are good enough. I would not recommend that you use unconverged results.

aras May 20, 2011 08:53

so, do you know what are the recommended y+ in fluent for k-e?

swiftaircraft May 21, 2011 08:44

This is clearly specified in the help files provided with Fluent

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