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Y plus, fine mesh in wall, error

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Old   December 30, 2013, 08:19
Default Y plus, fine mesh in wall, error
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faza dzulhimam
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hello everyone, i have a problem about y plus in turbulent flow,
i'm trying to resolve turbulent flow with "STANDARD WALL FUNCTIONS",
later, the results will be validated with experimental results

the rules for y plus with "STANDARD WALL FUNCTIONS" must be 30 < Y plus < 60, but when i get y plus with range 30 - 60 i have big error after validated,

if range of y plus fulfilled, what the results are definitely correct?
i used standard k-epsilon model

thanks for the help
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Old   December 30, 2013, 08:29
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Jakob
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How many cells do you place within the boundary layer?
Do you know the thickness of your boundary layer?
Guidelines suggest that 8-10 cells should be placed within the boundary layer typically yPlus from 20 to 200.

I suggest you have a look at Best Practice Guidelines by ERCOFTAC.
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Old   December 30, 2013, 09:07
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faza dzulhimam
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thank you hrvig and thanks for your suggest
is that guidelines for FLUENT ?

i didn't see cells in the boundary layer,
in near wall, i added mesh with "inflation" with maximum layer => 5
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