Wall functions

miad · April 19, 2017, 10:32

Dear members. I am working on viscous flow around airfoils.
Since I am using wall functions for high Reynolds number, I want to keep my y+>30. I have used the following link to calculate my wall distance for my desired y+ value.
https://www.cfd-online.com/Tools/yplus.php

I was wondering if this is a right method to obtain desired y+ values.

LuckyTran · April 24, 2017, 23:53

Yes, it's a good place to start. Try it and see what the actual y+ is from the result. Then adjust your mesh sizes accordingly. You can also apply a factor of safety, e.g. multiply by 2 and target y+>60.

miad · April 26, 2017, 12:33

Quote:

Originally Posted by LuckyTran

Yes, it's a good place to start. Try it and see what the actual y+ is from the result. Then adjust your mesh sizes accordingly. You can also apply a factor of safety, e.g. multiply by 2 and target y+>60.

Thank you for ur reply

April 19, 2017, 10:32	Wall functions	#1
miad New Member Miad Al Mursaline Join Date: Nov 2016 Posts: 15 Rep Power: 9	Dear members. I am working on viscous flow around airfoils. Since I am using wall functions for high Reynolds number, I want to keep my y+>30. I have used the following link to calculate my wall distance for my desired y+ value. https://www.cfd-online.com/Tools/yplus.php I was wondering if this is a right method to obtain desired y+ values.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wall functions - questions about implementation	AlmostSurelyRob	OpenFOAM Programming & Development	44	May 6, 2020 10:11
Boundary Field and Wall Functions, time 0 & time >0	NJG	OpenFOAM Running, Solving & CFD	1	April 5, 2013 10:48
wall functions implementation	besh	OpenFOAM Programming & Development	0	January 1, 2013 09:14
[ICEM] Export ICEM mesh to Gambit / Fluent	romekr	ANSYS Meshing & Geometry	1	November 26, 2011 12:11
Wall Functions	pierre	OpenFOAM Running, Solving & CFD	0	October 1, 2005 13:13

April 24, 2017, 23:53		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,668 Rep Power: 65	Yes, it's a good place to start. Try it and see what the actual y+ is from the result. Then adjust your mesh sizes accordingly. You can also apply a factor of safety, e.g. multiply by 2 and target y+>60.