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

January 14, 2012, 00:25		#3
Far Senior Member Far (turboenginner@gmail.com) Join Date: Mar 2009 Location: Islamabad Pakistan Posts: 1,173 Blog Entries: 1 Rep Power: 14	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 __________________ Best Regards Far

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January 13, 2012, 16:07		#2
scipy Member Join Date: Aug 2011 Posts: 55 Rep Power: 2	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.