Curvature Correction & Reattachment Mod.

September 14, 2007, 09:41

Hello,

CFX 11.0 includes the SST Curvature Correction and SST Reattachment Modification as beta features. Can anyone give detailed information on what these options are and how they work ? Or alternatively does anyone know where I can learn more on this subject (published paper / book) ?

Also, how can I use these options in PRE ? Shouldn't they appear in the Expert Parameters section after I enable beta features ?

Thanks, your help is always appreciated !

Felix

September 18, 2007, 09:36

Hi Felix,

as far as the SST Curvature Correction is concerned I can tell from my own experience that this beta feature is not really implemented yet. I had only a vanishing influence on my test case with the CFX SSTCC activated or deactivated.

In a first test I found that the SST curvature correction proposed by Hellsten (AIAA-98-2554) gave much better results. But it also lead to higher residuals.

When you find out anything else please let me know.

Take care, Andreas

PCFD · July 14, 2010, 07:51

Hi Jeromin,

with which code did you test the cc-model proposed by Hellsten? It wasn't CFX, right?

Are you using the CC-model in version 12.1, CFX? HAve you varied the CScale-coefficient. Would be interesting to know if that impacts your flow as well. It had quite a big influence on my results - but my experience is limited to version 12.0!!! I will analyze it now in 12.1.

Regards.

stumpy · July 14, 2010, 08:53

Curvature Correction would only make a difference for strongly swirling flows. In my experience SST + CC gave results similar to a Reynolds Stress model, but without the added expense and with the wall treatment benefits that come with SST. The option appears in Pre on the Domain > Fluid Models panel, under Advanced Control below where you pick your turbulence model (not sure if it's there in 11.0 though). I haven't used the reattachment modification before.

ourdean · December 18, 2010, 15:28

Hi everyone, I was wondering if anyone had the source code for the curvature correction which i can eyeball and implement, I would really appreciate this please. Could you send/forward to ourdean@gmail.com
Cheers

ghorrocks · December 19, 2010, 16:04

The source code is not available.

September 14, 2007, 09:41	Curvature Correction & Reattachment Mod.	#1
Felix Guest Posts: n/a	Hello, CFX 11.0 includes the SST Curvature Correction and SST Reattachment Modification as beta features. Can anyone give detailed information on what these options are and how they work ? Or alternatively does anyone know where I can learn more on this subject (published paper / book) ? Also, how can I use these options in PRE ? Shouldn't they appear in the Expert Parameters section after I enable beta features ? Thanks, your help is always appreciated ! Felix

September 18, 2007, 09:36	Re: Curvature Correction & Reattachment Mod.	#2
Andreas Jeromin Guest Posts: n/a	Hi Felix, as far as the SST Curvature Correction is concerned I can tell from my own experience that this beta feature is not really implemented yet. I had only a vanishing influence on my test case with the CFX SSTCC activated or deactivated. In a first test I found that the SST curvature correction proposed by Hellsten (AIAA-98-2554) gave much better results. But it also lead to higher residuals. When you find out anything else please let me know. Take care, Andreas

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Floating point exception error	Alan	OpenFOAM Running, Solving & CFD	11	July 1, 2021 21:51
CFX Streamline Curvature Correction model	flow.pratish	CFX	8	August 29, 2012 18:32
How to use SST Curvature Correction	mike wilson	CFX	11	December 19, 2010 16:04
Curvature and Rotation Correction	ourdean	Main CFD Forum	0	December 18, 2010 08:46
curvature correction term, material derivative of a tensor	volker	OpenFOAM Programming & Development	7	June 3, 2010 08:08

July 14, 2010, 07:51		#3
PCFD New Member Join Date: May 2009 Posts: 24 Rep Power: 16	Hi Jeromin, with which code did you test the cc-model proposed by Hellsten? It wasn't CFX, right? Are you using the CC-model in version 12.1, CFX? HAve you varied the CScale-coefficient. Would be interesting to know if that impacts your flow as well. It had quite a big influence on my results - but my experience is limited to version 12.0!!! I will analyze it now in 12.1. Regards.

July 14, 2010, 08:53		#4
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	Curvature Correction would only make a difference for strongly swirling flows. In my experience SST + CC gave results similar to a Reynolds Stress model, but without the added expense and with the wall treatment benefits that come with SST. The option appears in Pre on the Domain > Fluid Models panel, under Advanced Control below where you pick your turbulence model (not sure if it's there in 11.0 though). I haven't used the reattachment modification before.

December 18, 2010, 15:28		#5
ourdean New Member dean Join Date: Dec 2010 Posts: 4 Rep Power: 15	Hi everyone, I was wondering if anyone had the source code for the curvature correction which i can eyeball and implement, I would really appreciate this please. Could you send/forward to ourdean@gmail.com Cheers

December 19, 2010, 16:04		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,692 Rep Power: 143	The source code is not available.