CFD Online Logo CFD Online URL
Home > Forums > CD-adapco

How to define flame zone

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

LinkBack Thread Tools Display Modes
Old   March 3, 2001, 09:35
Default How to define flame zone
Posts: n/a
Hi,Friends, I am doing combustion simulation.I met a problem: 1,How to define the flame zone in difference combustiom model,ie. PDF model and EDBR model with Star-CD? 2,How to calculate temperature variance in star-cd results ? Any message is welcome.If your working is combustion simulation,we can disscuss some combustion model theroy. Thanks. Regards, Yang
  Reply With Quote

Old   March 14, 2001, 06:55
Default Re: How to define flame zone
Matej Forman
Posts: n/a
Hi Yang, For presumed PDF models location of flame zone can be defined as place with maximum variance of mixture fraction. this is the place, where it happends. For EDBR it could be either by temperature field or by fuel concentration. At least thats how i see it. I am using method "Look and see". I do not know the exact method for EDBR. If you want to compare the models, i would choose comparing concentrations of fuel. Hope this helps. matej
  Reply With Quote

Old   May 4, 2001, 02:35
Default Re: How to define flame zone
Hyun Roh
Posts: n/a
Hi Yang. I Think the flame region can be determined by CO destuction Zone (in the case of hydro carbon combustion). When U use multi step EBU model, U may put CO + 0.5 O2 -> CO2 step. And after U solve the model, U can get CO concentration distribution ans CO2 field. Then U may find some region where CO concentration decreases and CO2 goes higher. That may be the flame front.

I hope it helps U just a little bit.
  Reply With Quote

Old   May 16, 2001, 10:25
Default Re: How to define flame zone
Posts: n/a
Hi,thanks a lots I have fixed this promble
  Reply With Quote


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
define mass diffusivity for each zone kim FLUENT 1 October 17, 2011 20:36
how to define a local zone in whole fluid zone? Lcw FLUENT 3 September 21, 2004 08:33
how to pass bc from one zone to second zone Maria FLUENT 2 March 16, 2004 00:12
how to change inteior zone into fluid zone zwdi FLUENT 3 March 2, 2004 21:25
Define a zone to patch Maurizio Barbato FLUENT 1 October 13, 2000 00:10

All times are GMT -4. The time now is 00:58.