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Surface roughness and y+

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Old   November 15, 2023, 10:55
Default Surface roughness and y+
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Hi!

I have added surface roughness in my k-omega sst model and I don't know how to think about the y+ value. For a smooth pipe it should be around 1, but I can't get it below 20 with my added roughness and I can't find any information about this when I try to google, only for the wall functions but not when I want to be in the viscous layer.

Would really appreciate some insight in this and how to think or if anyone know where I can find information about the y+ for the k-omega sst model with roughness.

Thanks!!
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Old   November 16, 2023, 07:09
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Up! Would really need some help here if someone knows!!
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