CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM

turbulent round jet

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 3, 2010, 20:27
Default turbulent round jet
  #1
jet
New Member
 
Join Date: Nov 2009
Posts: 12
Rep Power: 16
jet is on a distinguished road
Hi,
I have a question about the self-similarity profile of turbulent round jets.
If I compare the mean velocity profile in the self-similar round jet calculated with the k-epsilon-turbulence-model by OpenFOAM with experimental data from for example Hussein et al. I get a good agreement between the profiles except at the edge of the jet!
Is there any question to this behaviour?

Thank's for your help!
jet is offline   Reply With Quote

Old   February 10, 2010, 09:04
Default
  #2
New Member
 
Paul Garlick
Join Date: Mar 2009
Location: Bournemouth, UK
Posts: 27
Rep Power: 17
pg22 is on a distinguished road
The standard k-epsilon model is not so accurate for the turbulent round jet. In particular, it tends to overpredict the spreading rate. This is often attributed to the epsilon equation and can be remedied by adjusting the model constants Ce1 and Ce2.

Alternatively, use the realizable k-epsilon model. This model correctly predicts the spreading rate of the round jet.

Paul.
pg22 is offline   Reply With Quote

Old   March 5, 2012, 23:42
Default
  #3
Member
 
skyinventorbt's Avatar
 
Dr. B T KANNAN
Join Date: Jul 2011
Location: CHENNAI (MADRAS), INDIA
Posts: 55
Rep Power: 14
skyinventorbt is on a distinguished road
I am new to OpenFOAM, Kindly tell me the possible way to create mesh for round jet in a circular domain (Like pipe with sudden expansion, pipe being the nozzle & enlarged pipe being the flow domain) using BlockMesh. If anybody have done it, kindly help me...
skyinventorbt is offline   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
CFD simulation of round turbulent jet Sheeko Main CFD Forum 4 June 18, 2013 21:53
Turbulent Round Jet Obnates FLUENT 8 May 14, 2009 10:55
Round jet model in FLUENT PurdueME Main CFD Forum 2 April 8, 2009 17:41
Turbulent Intensity good or bad for a jet Christian Main CFD Forum 0 November 19, 2003 06:47
Transient behaviour of a round jet Clifford Arnold Main CFD Forum 15 November 10, 1998 17:47


All times are GMT -4. The time now is 11:41.