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A thought on Wall Y+

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Old   May 13, 2005, 07:07
Default A thought on Wall Y+
  #1
Sham
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hello all,

I am modelling flow ard cylinder for various Re ranging from 100 - 10^6. I get a low Y+ values for low velocity(low Re. However, when I move to higher Re, say 10m/s the Y+ increases tremendously. This is using the same model(same mesh). Now, I know that wall Y+ depends on the velocity of the flow.

For low Re, I do not adapt boundary since Y+ value is low. If I use adapt boundary for high Re(high Y+), will that be consistent? Or shall I just keep to that value with using any boundary adaption to make it consistent.

I am using ske model with enhanced wall treatment.

Thanks in advance.

Sham.
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Old   May 18, 2005, 00:48
Default Re: A thought on Wall Y+
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venugopal
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you can use same mesh for high reynold number flows. For high reynold number flows Y+ at the wall should be as low as possible. And max. Y+ away from the wall more or less 65. You can use adaption or you can use fine mesh at the wall.

VenuGopal. S
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