Airfoil surface roughness

CMurphy · January 11, 2012, 18:09

Hi,

I am in final year in university and as part of my project I need to model an airfoil under different surface roughness conditions. I have gone through the Workbench airfoil tutorial and was wondering if this can be modified to vary the surface roughness? Any help that would put me in the right direction would be much appreciated!

Cheers

scipy · January 13, 2012, 16:07

I'm not familiar with the tutorial you've mentioned, but I know there's a surface roughness option in Fluent (under boundary conditions, pick the wall that represents the airfoil and it should be there..).

Other than that, I'm guessing you'd have to actually make the geometry rougher and have a pretty fine mesh to capture the roughness.

Maybe someone with more experience can correct me.

Far · January 14, 2012, 00:25

It is not practical to make the CAD model with these surfaces and it is near to impossible to mesh relatively very small geometric features (microns I am sure). You need to select this as option available in boundary conditions. Also read the turbulence model section related to roughness modeling

January 11, 2012, 18:09	Airfoil surface roughness	#1
CMurphy New Member Join Date: Jan 2012 Posts: 1 Rep Power: 0	Hi, I am in final year in university and as part of my project I need to model an airfoil under different surface roughness conditions. I have gone through the Workbench airfoil tutorial and was wondering if this can be modified to vary the surface roughness? Any help that would put me in the right direction would be much appreciated! Cheers

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January 13, 2012, 16:07		#2
scipy Senior Member Alex Pasic Join Date: Aug 2011 Location: Croatia Posts: 199 Rep Power: 15	I'm not familiar with the tutorial you've mentioned, but I know there's a surface roughness option in Fluent (under boundary conditions, pick the wall that represents the airfoil and it should be there..). Other than that, I'm guessing you'd have to actually make the geometry rougher and have a pretty fine mesh to capture the roughness. Maybe someone with more experience can correct me.

January 14, 2012, 00:25		#3
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	It is not practical to make the CAD model with these surfaces and it is near to impossible to mesh relatively very small geometric features (microns I am sure). You need to select this as option available in boundary conditions. Also read the turbulence model section related to roughness modeling