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Sam0508 March 25, 2013 19:33

Roughness Height
 
Hi,
I would like analyze the pressure drop in a circular pipe.Here I known wall roughness height.How could i setup the prism layer thickness to capture the roughness effect i.e the first prism layer near to the wall should be higher than roughness height or Lower than roughness height.Adv thanx

siara817 March 26, 2013 04:15

Do you have any experimental result to prove your CFD? if Yes then try first with a prism layer, small enough to solve the viscous boundary layer. Otherwise you need to refine the mesh. I suggest you once without prism layer as well. Since, the prism layer is not an essential mesher.

Sam0508 March 29, 2013 04:29

Roughness Height- STAR CCM+
 
1 Attachment(s)
Quote:

Originally Posted by siara817 (Post 416404)
Do you have any experimental result to prove your CFD? if Yes then try first with a prism layer, small enough to solve the viscous boundary layer. Otherwise you need to refine the mesh. I suggest you once without prism layer as well. Since, the prism layer is not an essential mesher.


Hello siara,
Thank you.do u know roughness height Vs Prism layer Thickness.Plz ref attachment.


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