Minimum yplus for SST

January 27, 2009, 19:21

Hello,

I am solving a model using SST turbulence and automatic wall treatment. I see that the maximum yplus must be less than 200 from the solver guide, but is there a minimum y+ value recommended for adequate near-wall modeling?

Thanks for your help.

January 28, 2009, 18:57

Please see Cyclone's detailed post titled "Re: YPlus value for SST" on Wed, 28 Jan 2009 at:

http://www.cfd-online.com/Forum/cfx.cgi?read=30632

for information.

January 28, 2009, 19:09

hi,

You will run into problems with very small y+ as round-off starts causing problems. When this happens is problem dependent. Need to do a sensitivity analysis to establish if it is important.

Glenn Horrocks

January 27, 2009, 19:21	Minimum yplus for SST	#1
EBM Guest Posts: n/a	Hello, I am solving a model using SST turbulence and automatic wall treatment. I see that the maximum yplus must be less than 200 from the solver guide, but is there a minimum y+ value recommended for adequate near-wall modeling? Thanks for your help.

January 28, 2009, 18:57	Re: Minimum yplus for SST	#2
andy2o Guest Posts: n/a	Please see Cyclone's detailed post titled "Re: YPlus value for SST" on Wed, 28 Jan 2009 at: http://www.cfd-online.com/Forum/cfx.cgi?read=30632 for information.

January 28, 2009, 19:09	Re: Minimum yplus for SST	#3
Glenn Horrocks Guest Posts: n/a	hi, You will run into problems with very small y+ as round-off starts causing problems. When this happens is problem dependent. Need to do a sensitivity analysis to establish if it is important. Glenn Horrocks

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