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[ANSYS Meshing] Meshing Micro Channel with surface Roughness

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Old   February 5, 2018, 08:04
Post Meshing Micro Channel with surface Roughness
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Jonathan
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Hi there,

I am trying to model a micro channel using the K-omega SST turbulence model.

Firstly I modeled this for smooth flow and everything was great and I was getting a Y+ of 1. Now I have added a surface roughness the Y+ has shot up to 100, I have read the law of the wall and adjusted my geometry appropriately and my roughness size according to the virtually shifting wall but my Y+ is still up around 20-50, I have made many attempts at adjusting the mesh but nothing seems to bring it down.

Any recommendations???

If any more info is required please ask
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Old   February 5, 2018, 10:26
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What is the point of of resolving the viscous sublayer?
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Old   February 8, 2018, 17:52
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Its so that I can see how surface roughness influences heat transfer in additively manufactured gas turbine vanes.

apologies for taking so long to get back.
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Old   February 14, 2018, 06:31
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Hey there its because we want to monitor the heat transfer effects from the rough surface.
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