LES and near wall treatment approach in Fluent

khosro1355 · July 9, 2009, 13:04

Hello,

I want to simulate turbulent airflow inside a chamber using Fluent 6.3.
I want to do it by choosing LES as the viscous model. When I choose LES the there is no explicit option for near wall treatment. Would you please let me know how can I define my near wall treatment approach when LES is selected as the viscous model?

Thanks

Khosrow

sbaffini · July 10, 2009, 11:49

Fluent automatically switch on the classical wall law wherever a high y+ is detected.
This is actually a blended linear-log profile dependent on the y+ value.

Another option available in fluent is to switch on the werner and wengle model via TUI. It follows a different approach based on a power law velocity profile.

July 9, 2009, 13:04	LES and near wall treatment approach in Fluent	#1
khosro1355 New Member Khosrow Ebrahimi Join Date: Jul 2009 Posts: 2 Rep Power: 0	Hello, I want to simulate turbulent airflow inside a chamber using Fluent 6.3. I want to do it by choosing LES as the viscous model. When I choose LES the there is no explicit option for near wall treatment. Would you please let me know how can I define my near wall treatment approach when LES is selected as the viscous model? Thanks Khosrow

July 10, 2009, 11:49		#2
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,192 Blog Entries: 29 Rep Power: 39	Fluent automatically switch on the classical wall law wherever a high y+ is detected. This is actually a blended linear-log profile dependent on the y+ value. Another option available in fluent is to switch on the werner and wengle model via TUI. It follows a different approach based on a power law velocity profile.