CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

Weird Results for Launder-Gibson-RSTM

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 11, 2009, 14:29
Default Weird Results for Launder-Gibson-RSTM
  #1
Member
 
Sven Schweikert
Join Date: Jun 2009
Posts: 38
Rep Power: 8
svens is on a distinguished road
Hello together

I'm running a simple calculation of 2D turbulent channel flow with OF standard Launder-Gibson-RSTM.

Evaluating the results wih the Log-Wall-Law there are huge differences to u+=1/kappa*log(y+)+5.5.

Before I run the RSTM calc I did the same with OFs k-epsilon model. The k-epsioln results representat almost perfect the Log-Wall-Law chracteristics.

The only differnce between the 2 cases have been the mesh. I used for the RSTM a grid with bigger first cell (y+=35).

Did anyone made similar experiences? Or have an idea were I have to tune to adjust my case for the RSTM?

Thanks for your input!

Cheers - Sven
svens is offline   Reply With Quote

Reply

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
Different Results from Fluent 5.5 and Fluent 6.0 Rajeev Kumar Singh FLUENT 6 December 19, 2010 12:33
some weird results about a simple pipe flow: Ning FLUENT 2 March 11, 2007 14:23
Gas flow in cyclone trouble with Launder Gibson RSTM andras OpenFOAM Running, Solving & CFD 0 July 4, 2006 04:56


All times are GMT -4. The time now is 22:03.