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

can alternate combustion model by UDF?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 1, 2008, 02:08
Default can alternate combustion model by UDF?
  #1
Han Xingsi
Guest
 
Posts: n/a
I'm trying to use PDF turbulence combustion model to simulate supersonic combustion. But it seems that this model has difficulty in convergence. Personally i think it may result from that the averaged field is obtained by statistic average. In shock regions, parameters have great gradient, statistic method may lead to too much statistical discrepancy. Then i want to alternate the combustion model during calculations. In this step, combustion model is PDF, and then in the next few steps, it will be chaged to other combustion models (EDC for example), and then it is changed to PDF again, so repeatedly. use the smooth flow field of EDC to enhance the convergence of PDF combustion model. can this idea be achieved by UDF? Wish someone can help me or exchange ideas with me, thanks a lot!

Han Xingsi

  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
combustion model in premixed combustion chamber wuyu FLUENT 6 March 26, 2014 14:58
Alternate Rotation Model Adam Stuchlik CFX 2 March 27, 2009 14:36
Sawdust Combustion-Non-premixed Combustion Model Jessy FLUENT 1 June 19, 2007 10:59
Alternate mesher to Gambit that is free? Steven FLUENT 0 February 27, 2007 01:00
Alternate method to subtracting volumes? Daniel Lee FLUENT 2 July 25, 2005 08:58


All times are GMT -4. The time now is 00:06.