CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Low Reynolds Model Comparison

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 30, 2013, 07:47
Default Low Reynolds Model Comparison
  #1
New Member
 
R. Silva
Join Date: Apr 2011
Posts: 29
Rep Power: 6
RSilva is on a distinguished road
Hi folks!

I am coding some Low Reynolds k-ep models (Jones-Launder (JL) and
Abe-Kondoh-Nagano (AKN)) and i'm testing them in a rectangular duct of 1 meter long just to see if the results are similar.

However, after getting convergence and realiable (I believe) profiles for k, ep, and velocity, the pressure profiles are giving me some doubts.

For the same geometry( the rectangular 1 meter duct) I get different pressure drops. Namely, with the AKN Low Re k-ep model I get larger pressure drops.

Is this normal? Shouldn't the models provide similar results?
I know the damping functions are different but the physics are the same.

Hope some can clear this up.

Thanks.

Best regards,

Rui Silva
RSilva is offline   Reply With Quote

Old   February 5, 2013, 10:26
Default
  #2
New Member
 
R. Silva
Join Date: Apr 2011
Posts: 29
Rep Power: 6
RSilva is on a distinguished road
Could use some advice on this matter.

Also, does anyone have experience on the implementation of the epwall for earlier low reynolds models?

Rui
RSilva is offline   Reply With Quote

Reply

Tags
duct, k-epsilon turbulence, low reynolds

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
Enhanced Wall Treatment paduchev FLUENT 18 April 11, 2014 07:37
Use of k-epsilon and k-omega Models Jade M Main CFD Forum 11 December 21, 2013 05:50
Low Reynolds number k-E Turbulent Model Sohail FLUENT 13 December 3, 2013 12:59
Turbulence model for low Reynolds number flow? Nokadu Main CFD Forum 3 May 26, 2013 11:42
Turbulence Model and limitation to Reynolds number qascapri FLUENT 0 January 24, 2011 11:48


All times are GMT -4. The time now is 23:52.