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

backward facing step problem

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 4, 1999, 16:32
Default backward facing step problem
  #1
Yung-Ming Chen
Guest
 
Posts: n/a
Hi, there,

I am trying to test a CFD code. One of the example I plan to test is the problem of "2D backward facing step" problem, i.e., a flow pass through a duct, at downstream the duct has a step down. Could any of you direct me to dig out some literature about the nature of this example? e.g., any analytical or approximation solution for this example, numerical difficulties perople are facing ... etc.. The following is a schematic picture of the duct. The flow is flowing from the left to the right. Any help is appreciate it.

----------------- ----

|____________

Yung
  Reply With Quote

Old   May 5, 1999, 00:17
Default Re: backward facing step problem
  #2
Tareq Al-shaalan
Guest
 
Posts: n/a
I know there are lots of work has been don on backward step. So you should not find a problem to find it in the literature
  Reply With Quote

Old   May 5, 1999, 09:25
Default Re: backward facing step problem
  #3
John C. Chien
Guest
 
Posts: n/a
It is one of the standard test case in CFD to test the numerical algorithm and turbulence modeling. It cas be either laminar or turbulent. You need to know the flow separation bubble size in order to make the computational domain large enough to cover the downstream duct and part of the upstream duct. The separation bubble size for turbulent flow is about six step heights. It is a function of Reynolds number for laminar flow.
  Reply With Quote

Old   May 11, 1999, 22:04
Default Re: backward facing step problem
  #4
Budi Dwisakti
Guest
 
Posts: n/a
Yung,

You may start with this

Speziale, C.G.; Thangam, S. Analysis of an RNG based turbulence modeling for separated flows. Int. Journal of Eng. Sci. 1992

OR

Turbulence Modeling for CFD by Wilcox

Hope this help

Budi
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Upgraded from Karmic Koala 9.10 to Lucid Lynx10.04.3 bookie56 OpenFOAM Installation 8 August 13, 2011 04:03
air-fuel mixing in backward facing step abdullahkarimi Main CFD Forum 0 March 19, 2011 18:39
Backward Facing Step on buoyantSimpleFoam tetsuro86 OpenFOAM Running, Solving & CFD 0 June 9, 2010 17:10
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 18:07
backward facing step ryoga Main CFD Forum 1 March 9, 2003 02:52


All times are GMT -4. The time now is 08:39.