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k-e convergence criteria

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Old   May 19, 2011, 23:53
Default k-e convergence criteria
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araz
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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?

thx
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Old   May 20, 2011, 06:29
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Hi,

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.
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Old   May 20, 2011, 08:53
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so, do you know what are the recommended y+ in fluent for k-e?
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Old   May 21, 2011, 08:44
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David Stanbridge
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This is clearly specified in the help files provided with Fluent
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