CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Question about standard k-e and low-re-ke

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   September 23, 2009, 19:45
Default Question about standard k-e and low-re-ke
Join Date: Apr 2009
Posts: 78
Rep Power: 10
tstorm is on a distinguished road
I'm using a UDF v2-f model. The v2-f model uses a different formulation for epsilon, but the same formulation for k as the k-e model.

As far as I can tell, the only difference between the k-e and low-re-ke models are the damping functions included in the epsilon transport equation. So my first question is, is that true?

If it's true, then why am I seeing different results for my v2-f model when I use the standard k-e model's k equation and the low-re-ke model's k equation?
tstorm is offline   Reply With Quote

Old   September 27, 2009, 23:19
Senior Member
Eric Nutsch
Join Date: Sep 2009
Location: Eugene, Oregon USA
Posts: 113
Rep Power: 10
ericnutsch is on a distinguished road
Send a message via Skype™ to ericnutsch
Im no pro, but i figued you could use some input.

Damping ratio shouldnt change the end result, but it can...
It is possible that one of your solutions has found a "local min" for the residuals and has converged on a phantom solution as opposed to the desired solution.

I would try increasing the mesh resolution and attempt the model comparison again.

Best of Luck
ericnutsch is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Low Pressure, Low Temperature Luke CFX 0 August 4, 2006 18:36
y+ value too low for use in standard wall function Allan Cross FLUENT 3 August 26, 2005 03:11
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12
A question about the low Reynolds number k-¦Åmodel Haribort CFX 0 December 27, 2001 02:49
Question about Low Re turbulence modelling. ghlee Main CFD Forum 1 May 28, 1999 19:29

All times are GMT -4. The time now is 21:42.