[ANSYS Meshing] Inflation layer thickness based on y+

ziggo · July 29, 2013, 13:21

Understanding that an inflation layer on walls is more or less mandatory for a turbulent flow I have begun researching that.
I don't understand completely what should fall in the y+ region. Is it the first prism cell or the full prism layer? To be more concrete, if my y+ value is 3.5e-4 m, should I set that value as the first layer thickness or total thickness in the inflation setup of Ansys meshing?

I found two contradicting statements on this topic. The manual states that all wall adjacent cells should be located within the log-law layer, but another site states that the y+ value is only related to the first prism layer.

Could somebody please explain this?

diamondx · July 29, 2013, 15:17

The first layer thickness

July 29, 2013, 13:21	Inflation layer thickness based on y+	#1
ziggo Member Bart A. Join Date: Feb 2012 Posts: 45 Rep Power: 0	Understanding that an inflation layer on walls is more or less mandatory for a turbulent flow I have begun researching that. I don't understand completely what should fall in the y+ region. Is it the first prism cell or the full prism layer? To be more concrete, if my y+ value is 3.5e-4 m, should I set that value as the first layer thickness or total thickness in the inflation setup of Ansys meshing? I found two contradicting statements on this topic. The manual states that all wall adjacent cells should be located within the log-law layer, but another site states that the y+ value is only related to the first prism layer. Could somebody please explain this? soheil_r7 likes this.

July 29, 2013, 15:17		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	The first layer thickness soheil_r7 and f.kh like this. __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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