CFX - Post Boundary layer Quality Assessment

hseyaodnanref · November 19, 2015, 10:10

Hi,

I am struggling to find out how to asses the boundary layer quality from the Y+ distribution. If anyone knows how to asses the quality please i help me with this

Thank you,
Hseya

tomson199 · November 19, 2015, 11:12

Could you describe your problem wider? You want to see Y+ parameter on the monitor in CFX-Solver or i CFD Post? Anyway, it is a simple formulation:
areaAve(Yplus)@Locator. Done

ghorrocks · November 19, 2015, 16:18

You cannot assess the boundary layer quality simply from the y+ distribution. It is more complex than that.

But at the end of the day, you need to do a mesh sensitivity study and this will determine if your mesh (and therefore your y+) is adequate for your application.

November 19, 2015, 10:10	CFX - Post Boundary layer Quality Assessment	#1
hseyaodnanref New Member Merin Fernando Join Date: Nov 2015 Posts: 3 Rep Power: 10	Hi, I am struggling to find out how to asses the boundary layer quality from the Y+ distribution. If anyone knows how to asses the quality please i help me with this Thank you, Hseya

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November 19, 2015, 11:12		#2
tomson199 Member Thomas Join Date: Dec 2014 Location: Poland Posts: 49 Rep Power: 11	Could you describe your problem wider? You want to see Y+ parameter on the monitor in CFX-Solver or i CFD Post? Anyway, it is a simple formulation: areaAve(Yplus)@Locator. Done

November 19, 2015, 16:18		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	You cannot assess the boundary layer quality simply from the y+ distribution. It is more complex than that. But at the end of the day, you need to do a mesh sensitivity study and this will determine if your mesh (and therefore your y+) is adequate for your application.