Hybrid Wall Treatment in OpenFOAM

cbarry · August 26, 2009, 09:47

Hi everyone,

In literature there is a lot of mention of blending low and high Re boundary conditions into hybrid wall functions. Several commercial codes also seem to be using this approach.

I've been reading up on some of the suggested approaches, but as I am fairly new to OpenFOAM I'm not sure how one would implement them.

Has anyone had a go at implementing such a model in OpenFOAM? Or do you have any suggestions where I could look?

Best regards,

Chris

ivan_cozza · August 27, 2009, 05:02

Hi Christopher,
up to release 1.5, there weren't anything like hybrid wall threatment in OF, as the wall functions were designed all for Hi-Re models (moreover, there weren't many Low-Re RANS models in OF 1.5....).
But I take now a rapid look in 1.6 implementation of wall functions, and it seems that the k-Omega SST could be used as an hybrid model without changes, just choose if put fixedValue or wallFunction on k bc (I suppose, still not tested...).
Anyway, any contribution in the direction of hybrid wall treatment could help to make OF more user-friendly and applicable to a wider range of cases.
Have a nice day,
Ivan

August 26, 2009, 09:47	Hybrid Wall Treatment in OpenFOAM	#1
cbarry New Member Christopher Barry Join Date: Aug 2009 Location: Switzerland Posts: 18 Rep Power: 17	Hi everyone, In literature there is a lot of mention of blending low and high Re boundary conditions into hybrid wall functions. Several commercial codes also seem to be using this approach. I've been reading up on some of the suggested approaches, but as I am fairly new to OpenFOAM I'm not sure how one would implement them. Has anyone had a go at implementing such a model in OpenFOAM? Or do you have any suggestions where I could look? Best regards, Chris

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
64bitrhel5 OF installation instructions	mirko	OpenFOAM Installation	2	August 12, 2008 19:07
OpenFOAM Debian packaging current status problems and TODOs	oseen	OpenFOAM Installation	9	August 26, 2007 14:50
Near wall treatment for k-e model	raik	Main CFD Forum	3	May 6, 2007 08:51
Enhanced Wall Treatment Problem	Andy Cong	FLUENT	0	November 13, 2005 23:55
Wall functions	Abhijit Tilak	Main CFD Forum	6	February 5, 1999 02:16

August 27, 2009, 05:02		#2
ivan_cozza Senior Member Ivan Flaminio Cozza Join Date: Mar 2009 Location: Torino, Piemonte, Italia Posts: 210 Rep Power: 18	Hi Christopher, up to release 1.5, there weren't anything like hybrid wall threatment in OF, as the wall functions were designed all for Hi-Re models (moreover, there weren't many Low-Re RANS models in OF 1.5....). But I take now a rapid look in 1.6 implementation of wall functions, and it seems that the k-Omega SST could be used as an hybrid model without changes, just choose if put fixedValue or wallFunction on k bc (I suppose, still not tested...). Anyway, any contribution in the direction of hybrid wall treatment could help to make OF more user-friendly and applicable to a wider range of cases. Have a nice day, Ivan