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Surface roughness?

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Old   September 16, 2012, 00:20
Default Surface roughness?
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If I have an object like this:

It's a model of an inductor, the coils are 18 gage wire. My question is do I need to apply a roughness to this surface, or will STAR recognize the "bumps" along the geometry? I had someone tell me that STAR will consider these surfaces smooth as part of wall treatment but applying a roughness seems unnecessary if the wires are modeled individually as they are. Now, if each coil pack was just a solid cylindrical shape then I could see why a roughness would be needed but I'm not sure.
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Old   September 17, 2012, 07:04
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siamak rahimi ardkapan
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I think it depends on the fineness of the mesh close to the wires.
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