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Results N0012 with y+<65 or y+<15 ?

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Old   February 4, 2011, 12:05
Default Results N0012 with y+<65 or y+<15 ?
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Hello!

My test:
Profil NACA0012
Re=1M
alpha=15
K-Omega SST with Trans. Flow

I read that when i use K-omega theory, i should have an y+<1. With my first mesh, I had an yplus < 65, and the profil is not in stall.

I use the "adapt" funtion to reduce the yplus. I used max. yplus=1, min. yplus=0. Then I iterate one more time, and now the profil is in stall (more accuracy?) and the yplus was < 15.

Which result has more accuracy? Can I use K-omega with yplus more than 1, or maybe should I use K-Epsylon?



Thank you!!
Ferran PM
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Old   February 5, 2011, 06:06
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Hello again,

I read about K-Omega SST and with Trans. flow I need y+<1. Should I suppose that my results are not so good enough?

Thank you

Ferran
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Old   February 5, 2011, 18:07
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y+ between 1 and 30 typically means bad results in Fluent, so your simulation with y+ < 15 is not to be trusted.

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