|
[Sponsors] |
Does realizable k-e model with enhanced wall treatment work for surface roughness? |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
May 4, 2012, 12:38 |
Does realizable k-e model with enhanced wall treatment work for surface roughness?
|
#1 |
New Member
Yangyang
Join Date: Aug 2011
Posts: 9
Rep Power: 15 |
Hi everyone,
I am trying to simulate in duct flow with surface roughness. I am using realizable k-e model with enhanced wall treatment now. I know k-e model not good for boundary simulation, but how about the realizable k-e model with enhanced wall treatment. Does realizable k-e model with enhanced wall treatment work well with surface roughness simulation? Is this correct model. If not, which turbulence model I should use? I have try SST K-W model but the result seems not good. Thanks. |
|
May 4, 2012, 21:27 |
|
#2 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,741
Rep Power: 66 |
Quote:
Wall/surface roughness is a wall modelling problem, not strictly a turbulence modeling problem. Also, recall that SST k-w is just a hybrid standard k-epsilon with omega treatment near walls. I would imagine that neither model should have much difficulty simulation rough walls for simple duct flows. Last edited by LuckyTran; May 4, 2012 at 21:45. |
||
May 4, 2012, 23:19 |
|
#3 | |
New Member
Yangyang
Join Date: Aug 2011
Posts: 9
Rep Power: 15 |
Quote:
In my case, the intruduced roughness is for increasing the turbulence in duct, which increasing the reactant mass transfer to reaction surface (wall). So I think I should use a turbulence model. I have try the standard wall function (k-e model), but the turbulence intensity on duct wall go infinit. I think turbulence intensity on duct wall should be zero. Can you tell me which model is best in my case? k-e with standard wall treatment or k-e with enhanced wall treatment or SST k-w? Thanks. |
||
May 4, 2012, 23:54 |
|
#4 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,741
Rep Power: 66 |
Quote:
You cannot use enhanced wall treatment, see my last post. Both models are good, you can use either. I wouldn't use the standard k-epsilon model though, I'd go for realizable k-epsilon or SST k-omega model as they are superior. |
||
May 5, 2012, 00:22 |
|
#5 |
New Member
Yangyang
Join Date: Aug 2011
Posts: 9
Rep Power: 15 |
Thank you very much.
|
|
November 15, 2017, 16:13 |
|
#6 | |
Senior Member
Reviewer #2
Join Date: Jul 2015
Location: Knoxville, TN
Posts: 141
Rep Power: 11 |
Quote:
|
||
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
natural convection | mehrdadeng | CFX | 10 | February 25, 2011 05:25 |
Help: about the enhanced wall treatment | maximus | FLUENT | 0 | May 10, 2006 11:55 |
Y+ Values for Enhanced Wall Treatment | Gerd | FLUENT | 5 | November 21, 2005 08:23 |
Enhanced wall treatment? | bylin | FLUENT | 3 | November 21, 2003 12:33 |
Wall functions | Abhijit Tilak | Main CFD Forum | 6 | February 5, 1999 01:16 |